1000 Sentences With "sexual maturity" | Random Sentence Generator

Or the heat could have delayed the animal's sexual maturity.

Many Ruddy Ducks failed to reach sexual maturity until the second year of the experiment (most Ruddy ducks typically reach sexual maturity at two years, but fewer reached maturity at one year than normal).

Once the females started reaching sexual maturity, it was fuck time.

The PHV also couldn't measure if boys hit sexual maturity earlier.

She watches her playmates get castrated when they reach sexual maturity.

This includes conversations about masturbating and self-pleasure once your child reaches sexual maturity.

Equally impressive is the advanced age at which female Greenland sharks reach sexual maturity.

This lazy-looking, Arctic predator reaches sexual maturity when it's about 5073 years old.

But it is absolutely true that these animals keep growing long after they reach sexual maturity.

Once she reaches sexual maturity, around 5 or 6 years old, she will acquire a boyfriend.

It's also no coincidence that the family's suspicion of Thomasin coincides with her budding sexual maturity.

Zebra finches learn their courtship song from their fathers and reach sexual maturity in about 100 days.

Mice have a three-week gestation period, or pregnancy, and take eight weeks to reach sexual maturity.

Corals are slow to reach sexual maturity, and, when they do, most spawn only once a year.

It takes 35 to 40 years for a green sea turtle to reach sexual maturity, she said.

In as little as two weeks after entering the final phase, they themselves will have reached sexual maturity.

" As for marriage, she added: "Females reach sexual maturity at around 14 years old, and males at 303.

Adult females reach sexual maturity between 20 and 50 years of age, when they then start laying eggs.

Ceremonies surrounding stages of life, such as birth and reaching sexual maturity, create different ways for disease to spread.

"The turtle takes a long time to reach sexual maturity, taking up to 25 to 30 years," he said.

Male spiders will live two or three months after reaching sexual maturity -- if the females don't eat them first.

He will enter the giant panda breeding program when he reaches sexual maturity, between 5 and 7 years old.

Trapdoor spiders take several years to reach sexual maturity, and because they hardly disperse, their colonies are fairly confined.

They age much more rapidly in their first year of life than we do, reaching sexual maturity around age one.

They're quick: quick to reach sexual maturity and quick to gestate (you can get a new generation every three weeks).

Unusual among amphibians for not undergoing metamorphosis, it reaches sexual maturity and spends its life as a giant tadpole baby.

Trilobites The African annual fish can reach sexual maturity in about two weeks, scientists found, the fastest known among vertebrates.

"By then, Meng Meng will have reached sexual maturity and could focus all her energy on seducing her partner," Knieriem said.

Nielsen's analysis, which determined that the animals do not reach sexual maturity until they're about 150, seems to support that hypothesis.

The carnivore doesn't even reach sexual maturity until age 150, according to a new study published this week in the journal Science.

Further analysis suggested the lifespan of Greenland sharks was at least 400 years, with sexual maturity reached around the age of 150.

He had chosen the species because, in theory, it can't reach sexual maturity in humans and spread from one person to another.

Natural selection reaches a crescendo at sexual maturity, when most individuals in a population are alive and striving to produce viable offspring.

It takes a rat just six weeks to reach sexual maturity, and from there only 70 days to produce seven to nine babies.

The mammal doesn't reach sexual maturity until it's 10, and females typically give birth to only one calf every three to five years.

Abalone grow slowly, taking seven years to reach sexual maturity and one or two more to reach the minimum size to be taken legally.

The mating squad began to reach sexual maturity a few years ago and this year managed to breed, said the center's manager, Yaniv Levi.

It takes a long time for emperor and giant forest scorpions to reach sexual maturity, and both types can live for more than thirty years.

Fibrolamellar bone is typically found in rapidly-growing dinosaurs, birds, and mammals, so the researchers suggest dodos grew very quickly until they reached their sexual maturity.

After reaching sexual maturity, drones that had been subjected to insecticides were dissected, and had their testes and mucous glands removed and analyzed for sperm viability.

After chicks hatched, they would rapidly grow to almost the size of an adult and reach sexual maturity within two to four months, before the cyclones began.

ECONOMISTS RARELY think about the average gestation period of pigs (115 days) or the length of time a sow needs to reach sexual maturity (roughly six months).

As part of the program, pandas return to China at 4 years old so that they can breed when they reach sexual maturity at 5 years old.

This "lack of sync," both in terms of delaying sexual maturity and penis growth, may have something to do with the intense level of male-on-male competition.

Tragically for conservation efforts, a female takes two years to produce a single calf, and two years to reach sexual maturity, so replacing each lost animal takes years.

Captive giraffes of both genders tend to be removed from their family groups before they reach sexual maturity, to avoid inbreeding; many are then transferred to another zoo.

Many shark species invest enormous time and energy into producing a small number of pups, and it can take several years for these juveniles to reach sexual maturity.

A few of the virgins had already boned in the wild before reaching sexual maturity and stored the sperm, so the researchers didn't include them in the final analysis.

Looking back on my experience with Plan B, I think it marked a turning point in my sexual maturity and a turning point in my relationship with my mom.

Pepperberg also noted that the birds used in the study were all quite young—none had reached sexual maturity, which might play a part in how or why they blush.

Plus, with such a long wait to get to sexual maturity, it means the number of young produced by a female in her lifetime is very low compared to other species.

"Sexual maturity by the children is reached between six and nine weeks, and so very quickly the second generation also starts reproducing, then the third generation and so on," he said.

The first thing we can say, therefore, is that age-of-consent laws that draw a bright line of sexual maturity at 18 or younger fail to consider the scientific data.

Her obsessive need to taste blood and the accompanying shock she feels at herself can stand in for the first terrifying brushes with sexual maturity, or personal reconciliation with an outré fetish.

Through a sustained reflection on Adam and Eve, Augustine came to understand that what was crucial in his experience was not the budding of sexual maturity but, rather, its unquiet, involuntary character.

It claims having accurate data of this kind is necessary for estimating the age-at-sexual-maturity (ASM) of the whales, which gives a better read on the health of whale populations.

In a paper published on Monday in Current Biology, a team of Czech researchers report that N. furzeri has the quickest known rate of sexual maturity of any vertebrate — approximately two weeks.

If the problem is lifelong, it will have been an issue since they reached sexual maturity, whereas acquired will have happened after they had normal sexual functioning for an extended period of time.

Though the time at which a person reaches sexual maturity may not seem obviously significant, hitting puberty early has been linked to higher risks of certain illnesses, such as diabetes and heart disease.

Attempts to protect turtle nests ramped up around 40 years ago, he said, and since loggerheads can take about 30 years to reach sexual maturity, saved hatchlings are getting old enough to mate.

The Texas brown tarantula, with a leg span of about 4 to 5 inches, typically makes the journey from late August to October once it reaches sexual maturity at around 10 years old.

It's one of a group of fairy tales — "Look at Snow White!" says Zipes — in which the heroine reaches sexual maturity and promptly becomes the object of intense sexual jealousy from her mother figure.

The patient had been taking feminizing hormone treatments for the past six years to develop fully grown breasts (Tanner stage v, according to the standard sexual maturity rating) using spironolactone, progesterone, and a type of estrogen.

Born out of Japanese street style culture in the 70s, Lolita fashion is intricate, layered, and visually modest; a version of femmehood that doesn't hinge on sexual maturity, or traditional notions of (straight male-centric) sexuality.

According to Toribio-Mateas, the results confirm earlier theories that "some hormone-like growth factors that are required during development to grow, then become promoting agents of aging after development and sexual maturity have been reached".

Although the colonies used in the experiment were subjected to realistic amounts of the insecticides, the drones were raised to sexual maturity after being removed from the colonies in which they were exposed to the chemicals.

In lieu of that, he makes a woman, his love interest Grace (Rose Byrne), present talking points about sexual maturity and why what he suspects is happening between Goodwin and his daughter might not be so bad.

Plus, using a color associated with "youthfulness" to market a product that monetizes the period — the traditional marker of the end of childhood and the beginning of sexual maturity — denies, shushes even, the full-fledged womanhood that a period represents.

And as scientists came to understand the genes' activities, it became increasingly clear that aging is not separate from the processes that control an organism's development before the age of sexual maturity; it makes use of the same biochemical machinery.

With a huge share of Africa's population reaching sexual maturity in the next four years, the virus could again imperil much of the continent if fewer people are treated, said Brian Honermann, deputy director at amfAR, a foundation that invests in AIDS research.

All this in spite of the males being physically larger and ensconced within a kin network of automatic allies (female bonobos leave their families, their natural power base, at sexual maturity, in order to join another troop and better avoid in-breeding).

Thanks to second-wave feminism, it's widely accepted that his theory left a legacy of collective psycho-sexual baggage we've barely begun to slough off, but even he couldn't have anticipated the climax cottage industry that his dubious claims about "sexual maturity" ushered in.

When the tigers reach sexual maturity and can no longer be handled safely, they often disappear, sold on the black market for up to $2200,2160, according to Karl Ammann, a Kenya-based investigative filmmaker who is making a documentary about the tiger farming industry.

Multiple births among these Jurassic reptiles suggests conditions were tough for offspring, which likely had to fend for themselves in what was surely an intensely dangerous environment; the high volume of offspring meant that at least some would likely be able to survive until sexual maturity.

The boys would have their testicles "surgically" removed in order to cut off the testosterone supply to the body and stunt sexual maturity; the boy would grow, but his voice would not, leaving him with the lungs of a man and the high notes of Mariah Carey.

Despite the relative squalor (friendly piece of advice: if you're ever suffering from an infestation of rats, don't google how quickly they reach sexual maturity and can start breeding, because you will never fucking sleep again) the quality of the company made living there more than bearable.

Researchers at Holekamp's lab think there could be an adaptive influence for female hyenas' aggression too: Spotted hyenas have a powerful skull and jaw—their teeth can crush bones up to 3 inches in diameter—but they don't achieve that level of strength until sexual maturity.

Murray cod reach sexual maturity between four and six years of age, generally five years. Sexual maturity in Murray cod is dependent on age. Therefore, roughly 70% of wild river Murray cod, with their slower growth rate, have reached sexual maturity by in length. Wild Murray cod in impoundments like Lake Mulwala, with their faster growth rates, do not reach sexual maturity until they are well over in length.

Sexual maturity is reached after about two years.Kawamichi, Takeo. "The age of sexual maturity in Japanese giant flying squirrels, Petaurista leucogenys." Mammal Study 22.1+ 2 (1997): 81-87.

Parameters of sexual maturity in man. In E. Hafetz (Ed.), Perspectives in human reproduction, Vol. 3: Sexual maturity: Physiological and clinical parameters. Ann Arbor, MI: Ann Arbor Science Publishers.

Females reach sexual maturity at 9–12 months of age and males reach sexual maturity at 12–18 months. Cephalophus zebra is the only duiker species with the diploid number 2n=58.

Sexual maturity is reached around for males and for females.

Females reach sexual maturity at a carapace length of around .

Following the larval stage, further nutrition is required for the development of internal reproductive structures to reach sexual maturity. Breeding experiments typically assign three to six weeks for these flies to reach sexual maturity, but a value for wild fly populations has not been determined with confidence. Sexual maturity can be indicated by accessory gland growth, maturing of sperm bundles, and sperm motility. Accessory gland growth was found to have the largest effect on sexual maturity, but it is not the sole effect.

Both males and females reach sexual maturity during the first year.

Sexual maturity is attained when the fish reaches a length of .

Sexual maturity is attained at a length of about 120 mm.

Their gestation period, lactation period, and sexual maturity age are unknown.

In banded mongoose (Mungos mungo) juvenile male helpers contribute far less than females. This is due to a difference in the age of sexual maturity. Female banded mongooses reach sexual maturity at one year of age, but males reach sexual maturity at two years of age. The difference in age causes the prolonged energy allocation to be detrimental to a specific sex.

Early Life History of Sauger in Missouri River Reservoirs. Department of Wildlife and Fisheries Sciences. Brookings, SD. Sexual maturity is reached between 2 and 5 years old. Other measures of sexual maturity are related to size.

As infants grow, however, they become very playful. Juveniles reach sexual maturity at an age of about 3 years. Daughters remain in their mothers' social groups, while males leave their natal groups shortly before attaining sexual maturity.

Males and females attain sexual maturity at lengths of around and , respectively.

Sexual maturity in snakes is regarded by experts as difficult to determine; however, it can be assessed by the snout-vent length (SVL). Sexual maturity is positively correlated to mean body size. In order to determine the sexual maturity of an Erythrolamprus, scientists have determined the diameter of ovarian follicles if seen to be >10 as indicative of sexual maturity in females, as is the presence of oviducal eggs. Males were considered mature if the testes were large and turgid or if the deferent ducts were opaque and convoluted, indicating the presence of sperm.

The calf suckling lasts 18 and 20 months. Sexual maturity varies by population, and ranges from 5–14 years of age; sexual maturity occurs between 8 to 13 years for males and 5 to 10 years for females.

Five-week-old fry. The convict cichlid can reach sexual maturity as young as 16 weeks, though sexual maturity more commonly occurs at 6 months. Sexually mature convicts form monogamous pairs and spawn in small caves or crevices.

A. azare represents an exception reaching sexual maturity by the age of 4.

Sexual maturity is usually reached at around eight to ten months of age.

Birds in juvenile plumage reach sexual maturity within their first year of age.

A blue whale calf with its mother Using the number of earwax lamina deposited in the earplug and development of sexual organs from dead whales, it has been determined blue whales reach sexual maturity at about 10 years old and at an average length of 23.5 m for female Antarctic blue whales. Another method for determining age at sexual maturity, involves measurements of testosterone from the baleen of male blue whales. Testosterone concentrations measured from baleen suggest that the age at sexual maturity for one blue whale was 9 years. Male pygmy blue whales averaged 61.4 ft (18.7 m) at sexual maturity. Female pygmy blue whales are 68.9–71.2 ft (21.0–21.7 m) in length and roughly 10 years old at age of sexual maturity.

Extended high water temperatures result in higher juvenile and adult mortality, and less egg survivability. Warmer water will bring invertebrates to sexual maturity earlier but with a smaller body size than cold water. A cold water environment will slow down invertebrate sexual maturity; consequently the shrimp have longer to grow, have a larger body size at sexual maturity than if they had been brought up in warmer water.

Females reach sexual maturity after 10–11 months and males at 21–22 months.

Newly emerged young measure under long; sexual maturity is attained at a length of .

The juveniles typically remain with their mother until they reach close to sexual maturity.

Growth is rapid as these lizards reach sexual maturity in 4 to 5 months.

They reach sexual maturity at less than 210 days in the wild. Males reach sexual maturity earlier than females. In captive populations, males mature 140 days after hatching at most. Females will begin spawning at around 156 to 196 days after hatching.

As a juvenile, her face is light colored, but it will darken upon sexual maturity.

S. sanniolus reaches sexual maturity in eight months and produces a single clutch per year.

Fur Seals (Arctocephalinae). afsc.noaa.gov Females typically reach sexual maturity around 3–4 years. The males reach sexual maturity around the same time, but do not become territorial or mate until 6–10 years. The breeding season typically begins in November and lasts 2–3 months.

They are found to share the same habitat as adults, and the older stages of the tadpoles are also toxic to many predators. The males reach sexual maturity in a year, while the females reach sexual maturity in at 1–2 years of age.

Macropis species are protandrous, as male bees emerge from their cocoons 1–2 weeks before females emerge. Because M. nuda males emerge before females, they also reach sexual maturity earlier. Females reach sexual maturity shortly after they emerge when they begin constructing their nests.

Cuscuses can live to be 11 years old, and reach sexual maturity around one year old.

The young armadillo is weaned at 10 weeks and reaches sexual maturity at 9–12 months.

Growth and maturity Atlantic blue marlin reach sexual maturity at the age of two to four years. Males reach sexual maturity at a weight of and females at . Blue marlin breed in late summer and fall. Females may spawn as many as four times in one season.

Males reach sexual maturity between 2 and 3 years or 68 and 93 cm in length. Females reach sexual maturity between 4 and 5 years or 70 and 130 cm in length. Smooth dogfish have a relatively low population doubling time of 4.5 to 14 years.

As with other howler monkey species, the majority of the Guatemalan black howler's day is spent resting. Eating makes up about a quarter of the day, moving about 10% of the day, and the remainder of the day is spent in socializing and other activities. Females reach sexual maturity at four, and males reach sexual maturity between six and eight years old. Males leave their natal group upon reaching sexual maturity, but females generally remain with their natal group.

Weight at sexual maturity per one study was stated as averaging while adult weight was claimed as .

Pangolins reach sexual maturity at 2 years old, when they leave their mothers and begin living alone.

Females generally reach sexual maturity between 12 and 17 months, and males between 15 and 25 months.

Both sexes reach sexual maturity by the time they are 20 cm long from snout to vent.

They reach sexual maturity at ten months. The ringtail's lifespan in the wild is about seven years.

Sexual maturity is reached at approximately five to six weeks (range 34 – 90 days). Timing of sexual maturity, as well as dispersal age, depends on environmental factors (e.g. resource availability), social cues (e.g. the presence of older, reproductively active animals), as well as the animal’s developmental history (e.g.

Alfaro, Roberto Mendoza, et al. (2008). Gar biology and culture: status and prospects. Aquaculture Research 39:748-763 Overfishing is a large issue for this fish, especially when the fish have not reached sexual maturity due to the female not reaching sexual maturity until about six years of age.

Catla attains sexual maturity at an average age of two years and an average weight of 2 kg.

The males do not care for the eggs. These fish attain sexual maturity at a length of around .

The slot limit protects the medium-sized fish, which can be considered to be at prime sexual maturity.

They grow to sexual maturity in two to three years and can live up to approximately 15 years.

A float of Nile crocodiles in Kilimanjaro Safaris at Disney's Animal Kingdom. On average, sexual maturity is obtained from 12 to 16 years of age. For males, the onset of sexual maturity occurs when they are about long and mass of , being fairly consistent.Loveridge, J. P., & Blake, D. K. (1972).

Newborn cookiecutter sharks measure long. Males attain sexual maturity at a length of , and females at a length of .

Males and females reach sexual maturity at disc widths of and respectively. The maximum lifespan is 15–25 years.

Hatchlings are long and are difficult to find. Sexual maturity is attained at three or four years of age.

The same growth model indicated Apatosaurus sp.BYU 601–17328 weighed , reached sexual maturity at 19years, and died aged 31.

The same growth model indicated that the diplodocid MfN.R.NW4 weighed , and died at age 23, before reaching sexual maturity.

Virtually nothing is known of the natural history of the magnificent catshark. Males attain sexual maturity at around long.

Little is known of the natural history of the northern sawtail catshark. Males attain sexual maturity at approximately long.

At birth, they are around in total length and at Sexual maturity, around in width and in total length.

This is the case in duikers and other small bovids. The time taken for the attainment of sexual maturity by either sex varies broadly among bovids. Sexual maturity may even precede or follow mating. For instance, the impala males, though sexually mature by a year, can mate only after four years of age.

Eudaniela has been recorded to reach sexual maturity at a large size and also at a relatively old age. The female reaches its sexual maturity at about three years of age. There is not enough data or information known to determine if the Eudaniela is in threat of being an endangered species.

The Philippine mouse-deer can be classified as a r-selected species. This type of organism lives in habitats that can be described as unstable or changing. Those falling under this category normally reach sexual maturity at a young age. T. nigricans is thought to reach sexual maturity at 5 months of age.

Females become sexually mature at two years of age, while males will acquire sexual maturity at three years of age.

Kittens generally reach sexual maturity at around seven months old. A cat reaches full "adulthood" around one year of age.

Females reach sexual maturity at four years, and males at five years; the total life expectancy is around 20 years.

The Baikal yellowfin can reach an age of up to six years and reach sexual maturity when two or three.

Typically a litter consists of only a single pup, born at around long. Males reach sexual maturity at around long.

Lifespan estimate is unknown. Sexual maturity might be reached at 9 years old. Calving interval and gestation period are unknown.

Young fish often inhabit the shallow reef waters, but move offshore once they reach sexual maturity. Due to a lack of discernible otolith rings, no studies on the growth of the bar jack have been published. Males and females reach sexual maturity at different lengths; males at 25 cm and females at 31 cm.

Their oldest male reached sexual maturity around 2012 and began to show an interest in females in 2014. The current female on display (another is maintained offshow) is long and expected to reach sexual maturity when . The aquarium holds 80 species of coral. Their corals have spawned every year at the aquarium since 2001.

Gerenuk reproduce throughout the year. Females reach sexual maturity at around one year, and males reach sexual maturity at 1.5 years, although in the wild they may only be successful after acquiring a territory (perhaps 3.5 years). The gestation period is about seven months. They are born one at a time, weighing about at birth.

In terms of maturity, female greater kudus reach sexual maturity at 15–21 months. Males reach maturity at 21–24 months.

The largest little tunny on record is and . Females reach sexual maturity at in fork length, while males mature at about .

The bird reaches sexual maturity around 3–4 years old. The oldest recorded Major Mitchell's cockatoo died at 83 years old.

Young darters reach sexual maturity after one year. Niangua Darter eat the nymphs of stoneflies and mayflies, and other aquatic insects.

At physical maturity, females average and males . At sexual maturity, females average and males . Calves are estimated to be at birth.

Adult size and sexual maturity is reached between two and three years of age. Mating usually occurs between January and March.

Sahih Muslim permits marriage once a person reaches sexual maturity (i.e.: menstruation, voice changing, wet dreams) (baligh). Sexual maturity in Sharia law is typically understood to mean puberty.Islam and the Everyday World: Public Policy Dilemmas Page 102, Sohrab Behdad, Farhad Nomani, Farhad Nomani 2006 At the same time, intercourse is forbidden until they are able to physically bear it.

They reach sexual maturity in five to eight years. Baboon males leave their birth group, usually before they reach sexual maturity, whereas females are philopatric and stay in the same group their whole lives. Baboons in captivity have been known to live up to 45 years, while in the wild their life expectancy is between 20 to 30 years.

The yellow-faced pocket gopher, Pappogeomys castanops, in Kansas. Trans. Kansas Acad. Sci., 73:368-375 There is sexual dimorphism in the yellow-faced pocket gophers; the males are larger than the females. The males of all genera of pocket gophers continue to grow after attaining sexual maturity, but females grow little after reaching sexual maturity.

The coconut crab reaches sexual maturity around 5 years after hatching. They reach their maximum size only after 40 to 60 years.

In this, they are similar to species such as snapping turtles, with late-aged sexual maturity, albeit not to the same extent.

Virtually nothing is known of the natural history of the Izu stingray. It attains sexual maturity at a disc width of around .

This process takes around 28 days. After one year, the crab reaches sexual maturity, and adult life span is typically 12–18 months.

The females attain sexual maturity at a standard length of and a female may produce 24,000 eggs and one at can produce 113,200.

Young bat-eared foxes disperse and leave their family groups at 5–6 months old and reach sexual maturity at 8–9 months.

Sexual maturity is reached at one year of age. As with many other species, habitat destruction is the primary threat to this species.

The species is long-lived, taking at least four years to reach sexual maturity and living for several decades, possibly over a century.

Techniques in the immobilisation and handling of the Nile crocodile, Crocodylus niloticus. National Museums and Monuments of Rhodesia. On the other hand, that for females is rather more variable, and may be indicative of the health of a regional population based on size at sexual maturity. On average, according to Cott (1961), female sexual maturity occurs when they reach in length.

For other gerbils such as the hairy footed gerbil, sexual maturity has a slightly earlier and longer window of 60-90 days in comparison with a later and shorter window for Mongolian gerbils, 70-84 days . Females reach sexual maturity shortly after this opening occurs. They experience oestrus cycles every 4-6 days. Mongolian gerbils are regarded as monogamous within science.

Mating Calf suckling Camels have a slow growth rate and reach sexual maturity slower than sheep or goat. The age of sexual maturity varies geographically and depends on the individual, as does the reproductive period. Both sexes might mature by three to five years of age, though successful breeding could take longer. Mating occurs once a year, and peaks in the rainy season.

Breeding and reproduction usually happen in the winter months. Females reach sexual maturity at the age of 22–40 days, while males reach sexual maturity beginning around 44 days old and not before they reach a body weight of 20 grams. Females are able to have two or three litters per year. Litter sizes usually range from three to seven young.

Breeding typically occurs three to four times per year.Jensen,2006 Females reach sexual maturity at eight to ten years, while males reach sexual maturity at four to five years.Koch,2008 Amyda cartilaginea is oviparous and builds protective nests at night. The incubation period ranges from 18–20 weeks,Kaplan,2016 with the size of each clutch ranging from one to 30 eggs.

Later the Horned grebe will take their first flight at 55–60 days old. The species finally reaches sexual maturity at 2 years old.

They are weaned at around five months and reach sexual maturity at around ten months. In captivity they live for eight to eleven years.

Females bear litters of 1–15 pups every year; the newborn rays measure about long. Males and females reach sexual maturity at long respectively.

Eastern brown snakes can reach sexual maturity by 31 months of age, and have been reported to live up to 15 years in captivity.

Newborn rays measure long, and still have the anterior notches in the disc. Males and females reach sexual maturity at lengths of and respectively.

After another four weeks the chicks are left to their own devices and reach sexual maturity at about nine to twelve months of age.

Sexual maturity varies depending on sex. Females mature for breeding after 15 months while males do not mature until they are roughly three years old.

They also have low fecundity due to their long gestation period, around 12 months, though not much is known about their age of sexual maturity.

This trade, combined with habitat destruction and a high rate of mortality prior to sexual maturity, means that T. vagans is considered vulnerable to extinction.

In its natural habitat, Chinese high-fin banded sharks live for more than 25 years and reaches sexual maturity when 5 to 6 years old.

Breeding occurs in the austral summer when water temperatures approach 20 °C. Sexual maturity is attained in about one year at 65 mm standard length.

Geo- locators fitted on young birds revealed some circumnavigate Australia in an anti-clockwise direction in the 4–5 years leading up to sexual maturity.

The litters of three to nine young reach sexual maturity at six to eight weeks of age. Individuals rarely live for more than nine months.

Males and females reach sexual maturity at around across respectively. The maximum lifespan is at least 11 years for males and 18 years for females.

The largest fetuses on record measured long, which is presumably close to the birth size. Males reach sexual maturity at long, and females at long.

Male ringed Seals reach sexual maturity as late as 7 years old. For females, sexual maturity can be as late as 9 years, but it can be as early as 3 years for both sexes. Ringed seals breed annually, but the timing varies based on the region. Though the timing varies with latitude, pupping usually occurs in late March through April in the Arctic.

Results showed how and when the modern tortoise appeared in the fossil record, with both species reaching their adult sizes over 40 years. This allowed an understanding in the carrying capacity of the habitat, sexual maturity and individual lifespan. It also confirmed that Gopherus species most adapted to the Badlands habitat due to faster growing individuals and their shorter time to reach sexual maturity.

Young boas tend to be arboreal in nature, but as they grow larger and heavier, they become more terrestrial. Boa constrictor occidentalis reach sexual maturity around 2–3 years. Young Boa constrictor occidentalis will shed their skin up to 9 times a year if intensely fed. As the subspecies reaches sexual maturity, this shedding process slows down to four to five sheds per year.

The sexual maturity of females is around 10 months of age. Kits begin to hunt with their parents at the age of 3 months. By the time that they are four months old, the kits will have developed their permanent dentition and can now easily forage on their own. The family group remains together until the autumn, when the young males reach sexual maturity, then they disperse.

Male lake sturgeon typically reach sexual maturity at 8 to 12 years, but may take up to 22 years. Females reach sexual maturity at 14 to 33 years, most often from 24 to 26 years of age. These sturgeon spawn on clean, gravel shoals and stream rapids, usually from April to June. They prefer to spawn in temperatures between 55 and 64 degrees Fahrenheit.

This relationship that was analyzed, was that there was a positive correlation, meaning that the larger the carapace, the more offspring that the female fiddlers would be able to have. This idea also relates with sexual maturity. In the mangrove fiddler crab, to determine sexual maturity in both the male and female crabs, the size of the male cheliped and the female abdomen controls it.

In Turkey spawning occurred between November and January. In India, December–April and August–September are the two main spawning seasons. Similarly, minimum size at sexual maturity also varied across range and possibly with sampling seasons, with males reaching sexual maturity from in Turkey, in Tunisia, and in India and Egypt. Size at maturity for females were in India, in Turkey and in Tunisia.

The sexes are separate. Eggs are usually laid in the spring. The snails often reach sexual maturity in a year, and can live for 5 years.

This species sexual maturity after attaining a total length of , they are most commonly recorded at total lengths of around and the longest recorded fish was .

Males and females attain sexual maturity at approximately and long respectively; rays found around Lakes Entrance, Victoria apparently have a smaller maturation size than those elsewhere.

Males compete for females by ramming their horns with amazing force. Gestation periods last 150–165 days. They reach sexual maturity at one year of age.

P. argus may reach up to long, but typically around , and is fished throughout its range. Sexual maturity in females is reached at a carapace length of .

Reproduction in the species is poorly understood, although observations indicate it spawns in the more tropical regions of its range, with sexual maturity reached at 50 cm.

None are fully terrestrial as they must enter the water to breed. Juvenile newts, which are known as "efts", are primarily terrestrial until they reach sexual maturity.

The young fledge at 65 to 75 days of age. Around 64% of young successful reach adulthood, attaining sexual maturity at 3 to 4 years of age.

G. equulus is a multiple spawner. Its spawning season is continuous from June to September. The female gains sexual maturity at a minimum of 141 mm long.

Female ferrets reach sexual maturity at around 8 –12 months of age. A ferret gives birth to an average of 8 kits, gestation last about 41 days.

Fry rear in still waters on the edge of streams. They reach sexual maturity in their first year and have an average lifespan around 3–4 years.

The young are born at a length of . Juvenile sharks grow slowly, at a rate of per year. Both sexes attain sexual maturity at a length of .

The time of onset of sexual maturity may be earlier or later, depending on local climate conditions, with an earlier age of onset in warmer areas. Males apparently reach sexual maturity two weeks earlier than females. Since pregnant females have been found, which are still lactating, it is suspected that they became pregnant while nursing the young from prior broods. The average brood size is around 3-5.

Depending on the size, the average female may lay 195,000 – 8 million eggs during spawning season, with the average female laying 2.3 million eggs. In response to the overfishing, the tilefish's age of sexual maturity has been dramatically affected. From 1978 to 1982, the median age of sexual maturity in males declined by 2.5 years from 7.1 to 4.6 years. This resulted in the males becoming sexually mature before females.

They are extremely vulnerable to extinction by poaching because they have late sexual maturity. On average their sexual maturity lasts from 6 to 25 years of age. Sturgeon Caviar output, including the Kaluga, from 1957 to 2005, averaged about 117 tons per year. The animals are being hunted down for their unfertilized eggs because sturgeon roe is considered a delicacy to people all across the world (Yang et al. 2006).

Coimbra Filho's titi, like most titis, is a folivore-frugivore, with a diet consisting mostly of leaves, but also including various fruits. Coimbra Filho's titi generally lives in small groups consisting of three to five members. Such a group generally contains a breeding pair and its direct offspring that have yet to reach sexual maturity. However, upon reaching sexual maturity, individuals leave their natal groups, and often immigrate to new areas.

Sexual maturity occurs at about 18 months, and females give birth to their first young at 2 years old. Life span can be as long as 30+ years.

Males and females reach sexual maturity at disc widths of and respectively. The maximum lifespan is estimated to be 9 years for males and 13 years for females.

The mantled howler differs from other howler monkey species in that the males' testes do not descend until they reach sexual maturity. Upon reaching sexual maturity, the young monkeys are usually evicted from their natal group, although the offspring of a high-ranking female may get to stay in its natal group. However, many infants do not reach sexual maturity; high-ranking adults sometimes harass or kill the offspring of lower-ranking monkeys to eliminate competition to their own offspring for an opportunity to remain with the group upon reaching maturity. Natal emigration is performed by both sexes, with 79% of all males and 96% of the females leaving their original social group.

Both sexes reach their sexual maturity at three months, but the lifespan of a typical mouse living in the wild is only a few weeks to a few months.

Weaning occurs at 4–5 months. Sexual maturity is reached at the age of 3–5 years. In Thailand, they have been trained for 400 years to harvest coconuts.

Babies usually weigh about at birth. The young stay with the mother but are weaned by six months old. Sexual maturity is reached between one and two years old.

Lactation ends at around 52 days. Males reach sexual maturity at eight months while female mature at 10 months. The former leave their natal groups while the latter remain.

Adults emerge in May and their young in June. Female marmots reach sexual maturity at three years of age, and produce litters of 1–6 every other mating season.

Sexual maturity is thought to occur around six years, with only one calf born at a time. Gestation is approximately one year, and lactation lasts for over six months.

The collective results of this study indicate that the Gulf corvina is a fast growing sciaenid fish that attains sexual maturity at a relatively small size and young age.

Males reach sexual maturity around at around 16 years of age, while females reach sexual maturity at and 12–14 years of age. Saltwater crocodiles mate in the wet season, when water levels are at their highest. In Australia, the male and female engage in courtship in September and October, and the female lays eggs between November and March. It is possible the rising temperatures of the wet season provoke reproductive behaviour in this species.

As with most ancestral species, alligator gar are long-lived, and sexually late maturing. Most females do not reach sexual maturity until after their first decade of life, while males reach sexual maturity in half that time. The conditions must be precise for a successful spawning to occur. Preparation for spawning begins in the spring with the extended photoperiod and rising water temperatures, but flooding is also necessary to trigger the event.

The tangerine darter spawns in shallow sandy gravel riffles that have consistent flowing water. The tangerine is a late spring to summer spawner. The breeding season, which is triggered by water temperature, begins in May and runs through July. Spawning occurs at about three to four years of age, although sexual maturity comes much earlier for tangerine darters, with males reaching sexual maturity at one year of age and females two years of age.

A newborn is weaned from its mother at 6–9 months of age, when it is long, so weaning takes place at the summer or autumn feeding grounds. Females reproduce every 2–3 years, usually to a single calf. In the Northern Hemisphere, males are usually and females at sexual maturity, while in the Southern Hemisphere, males average and females . The average age of sexual maturity of both sexes is 8–10 years.

Although it can swim, using its pleopods, the post-larva soon settles to the bottom and lives as a juvenile for 3–5 years. As adults, Homarus species moult increasingly infrequently. The size at sexual maturity varies with temperature; it is around for female H. americanus in southern New England, but around the Bay of Fundy. In H. gammarus, the size at sexual maturity is less well defined, but is in the range .

Male narwhals attain sexual maturity at 11 to 13 years of age, when they are about long. Females become sexually mature at a younger age, between 5 and 8 years old, when they are around long. The pigmentation of narwhals is a mottled pattern, with blackish- brown markings over a white background. They are darkest when born and become whiter with age; white patches develop on the navel and genital slit at sexual maturity.

The average life span for Psammodromus hispanicus is only 2 to 3 years, many specimens die after their first mating season. They reach their sexual maturity in their first year.

Females produce offspring starting at age 5, and thereafter in a cycle of 2 years. Typically, Bactrian camels seen alone are postdispersal young individuals which have just reached sexual maturity.

Hedgehogs can breed multiple times in one year and the baby hedgehogs reach sexual maturity 61–68 weeks of age. Males take no part in the raising of the young.

Studies have found that it takes approximately 3 years for the little tunny's gonads to reach sexual maturity. The average size of a sexually mature individual is in fork length.

At three months old, the young have grown by and their coloration has faded to match that of the adults. Males and females attain sexual maturity at around and respectively.

Like many reptiles, all marine turtles of a same aggregation are highly unlikely to reach sexual maturity at the same size and thus age.Limpus, C.J., P.J. Couper & M.A. Read. 1994.

Side view of skeleton Dysalotosaurus was a precocial dinosaur, which experienced sexual maturity at ten years, had an indeterminate growth pattern, and maximum growth rates comparable to a large kangaroo.

Male white- bearded gibbons weigh about 6.1 to 6.9 kg and females weigh 5.5 to 6.4 kg. Female white-bearded gibbons tend to reach sexual maturity in about 48 months.

She donated to low standard of living children for their education her all income from the art exhibition. And she created and give video lesson about sexual maturity for adolescence.

Mottled sculpin reach sexual maturity at the age of two.Hann, H.W. 1927. The history of the germ cells of Cottus bairdi Girard. Journal of Morphology and Physiology 43:427-497 .

Size and age at maturity increase with latitude; at the northern edge of their range, males reach sexual maturity at 7–9 years of age and females at 11–16.

Both sexes reach sexual maturity at two years of age. The expected lifespan of D. tinctorius azureus is about 10 years in the wild, and about 12 years in captivity.

Males and females from Greece have a reproductive cycle that begins in April and ends in July. Both sexes achieve sexual maturity when they reach approximately 80 millimeters in body size.

On average, males tend to grow slightly larger than females. Little is known of this species’ reproductive biology. Research suggests that males reach sexual maturity at lengths between and females between .

Sexual maturity is reached after 7–40 days, and the animal's longevity depends on the temperature and the season, ranging from 30 days in summer to over 60 days in winter.

Lang, J. W. (1987). "Crocodilian behaviour: implications for management", pp. 273–294 in Wildlife management: crocodiles and alligators. However, even females will not reach proper sexual maturity for another 10 years.

Sexual maturity in females is apparently attained between 115–130 mm carapace length. Clutch size is estimated to range from 2-4. Several clutches may be laid in a reproductive season.

By the time the next set of cubs is born, the older cubs have moved on. Aardwolves generally achieve sexual maturity at one and a half to two years of age.

The Dalmatian pelican, Pelecanus crispus, nesting in Mediterranean lagoons in Albania and Turkey. Colonial Waterbirds, 184-189. Sexual maturity is thought to be obtained at three or four years of age.

The litter size varies between two and eleven pups, and newborns measure long. Sexual maturity is attained at lengths of for males and over in females. Females grow larger than males.

Males grow to 140cm at the withers and weigh 875-950kg. The coat colour is black. They have a calm and docile nature. Heifers reach sexual maturity between 18-20 months.

Those that do survive reach sexual maturity between 3-5 years. Males generally leave the group to join a neighboring group while adult females tend to stay with their natal group.

Juvenile crystal darters grow rapidly and reach sexual maturity before age one, but do not spawn until the following season. Most females reach sexual maturity by 50 mm standard length, but males do not mature until they reach 61 mm standard length. Males grow faster and, consequently, adults males are larger than females of the same age. The difference in growth rates and size is probably due to females allocating more of their energy for reproduction.

While males consistently reach sexual maturity at small sizes, that size is larger and more variable in females. Some may reach maturity at a plastron length of 24 cm, and others may not mature until they reach a length closer to 30 cm. The onset of sexual maturity will occur anywhere from 5 – 8 years of age. The female nesting season can range anywhere from early April to early August, and incubation lasts an average of 60 – 90 days.

The high iron content and low levels of free lactose differ from eutherian mammals. Lactose production is believed to proceed along the same lines as in the platypus. The age of sexual maturity is uncertain, but may be four to five years. A 12-year field study found the short-beaked echidna reaches sexual maturity between five and 12 years of age, and the frequency of reproduction varies from once every two years to once every six years.

The bluefin's slow growth and late sexual maturity compound its problems. The Atlantic population has declined by nearly 90% since the 1970s. In Europe and Australia, scientists have used light- manipulation technology and time-release hormone implants to bring about the first large-scale captive spawning of Atlantic and southern bluefins. The technology involves implanting gonadotropin-releasing hormone in the fish to stimulate fertile egg production and may push the fish to reach sexual maturity at younger ages.

Little is known about the reproductive cycle of giant squid. They are thought to reach sexual maturity at about three years old; males reach sexual maturity at a smaller size than females. Females produce large quantities of eggs, sometimes more than , that average long and wide. Females have a single median ovary in the rear end of the mantle cavity and paired, convoluted oviducts, where mature eggs pass exiting through the oviducal glands, then through the nidamental glands.

D. wrighti courtship differs from other members of Desmognathus in the phenology of oviposition which is in late summer into autumn. Males reach sexual maturity by their second or third year while females reach their sexual maturity by their third year. Males normally have two testes lobes but this number can increase with body size. In courtship males use their vomerine teeth to bite the female which in turn allows pheromone secretion to enter directly into the female circulation.

Males weigh about and females weight about . It lives in groups with multiple males and females. It reaches sexual maturity at 18 months. Both males and females emigrate from their natal group.

Kids are weaned after 6 months. Female goats reach sexual maturity at 1½–2½ years, males at 3½–4 years. The lifespan of a goat can be from 12 to 22 years.

After hatching, young B. paludosa spend 20–30 days as larvae, before reaching sexual maturity between the end of July and middle of August. They are then reproductive for 35–45 days.

Predator-prey interactions with delays due to juvenile maturation. SIAM Journal on Applied Mathematics, 66(3), pp. 1050-1079. When this generation reaches sexual maturity there are fewer offspring, continuing the pattern.

The age of sexual maturity is unknown, although probably around three or four years, as it is in the closely related onager. Kiang live for up to 20 years in the wild.

The body of the tadpole stage also is covered with variable sized bony portions protruding out of the body, which will eventually disappear in only the males who have reached sexual maturity.

Virtually nothing is known of the natural history of the yellow shovelnose stingaree. It is presumably aplacental viviparous like other stingrays. Newborns probably measure around long; males reach sexual maturity at long.

The types of barriers that can cause this isolation include: different habitats, physical barriers, and a difference in the time of sexual maturity or flowering.Levine, L. 1979. Biología del gen. Ed. Omega, Barcelona. .

At birth, Cardabiodon individuals measured between in length and reached sexual maturity at around five to seven years of age, but no conclusive estimates on the maximum lifespan of Cardabiodon have been made.

The Gulf salt marsh snake reaches sexual maturity at three years. Females give birth to 2-44 live young that range from in total length. Their typical lifespan is up to 20 years.

They are grey-brown with dark and pale dorsal stripes. They reach adult size in 6–8 weeks and adult-like plumage at 2–3 months. They reach sexual maturity at 6 months.

USGS Western Fisheries Research Center, Klamath Falls Field Station. Retrieved October 6, 2011. It does not reach sexual maturity until six to 14 years of age, most maturing around age 9.Deltistes luxatus.

There is a report of mating being observed inside a cave at night. Newborns measure approximately long. Size at sexual maturity is uncertain; one recorded male was found to be adult at long.

In 2008, the median age of sexual maturity in males had risen to 5.9 years. Females of the species also exhibit low reproductive ability after becoming sexually mature, instead increasing with age and their sexual maturity has varied to a lesser extent than the male population across the years. A small percentage of golden tilefish is known to be intersexual, having opposite nonfunctional sex tissues. Male tilefish specimens also inhibited a cavity that came from ovarian tissue and sperm sinuses.

This study was the first estimation of age structure for amphibians using skeletochronologically. E. Kyoko & M. Masafumi’s study of Salamanders involved analysing age at first reproduction and growth patterns as local populations were declining. Each individual was marked by toe clippings while their body size was measured, with the study beginning in 1983. Results showed that male salamander growth decreased greatly after reaching sexual maturity while females grew larger as they do not reach sexual maturity as early as the males.

Both sexes of the eastern school whiting reach sexual maturity at around 170 mm in size and 2 years of age, with males reaching maturity slightly before females. Once at sexual maturity, they move offshore into deeper waters to over 180 m in depth where they remain and spawn. Females produce between 30 000 and 110 000 eggs per season, which occurs between October and January, with two spawning periods identified in populations occurring in Bass Strait.Hobday, D.K. & J.W.J. Wankowski. 1987.

Rosenthal (1970) reported onset of sexual maturity at c. 60 mm in shell length (defined as maximum shell length from the tip of the spire to the tip of the siphonal canal). having reached sexual maturity, growth slows considerably and it has been suggested that it takes at least 20 years to reach 3.5 inches (9.0 centimeters). In a year-long tagging study in southern California the majority of the 188 animals recaptured showed no growth at the end of the year.

As well as being 'followers', larger specimens have also been observed as the 'followed' species. The species has also been observed living in close relationships with spinner dolphins, feeding off the dolphin's waste products. This behavior has also been observed in a number of other jacks living in the region. Yellow jacks reach maturity at different times in different locations, with studies around Cuba showing males reach sexual maturity at and females at , while in Jamaica, males reach sexual maturity at .

They may be external, such as drought, or internal, such as percentage of body fat (such internal cues are not to be confused with hormones which directly produce sexual maturity). Sexual maturity is brought about by a maturing of the reproductive organs and the production of gametes. It may also be accompanied by a growth spurt or other physical changes which distinguish the immature organism from its adult form. These are termed secondary sex characteristics, and often represent an increase in sexual dimorphism.

Relative to the control group, the exposed boys had high levels of endosulfan in their bodies, lower levels of testosterone, and delays in reaching sexual maturity. Birth defects of the male reproductive system, including cryptorchidism, were also more prevalent in the study group. The researchers concluded, "our study results suggest that endosulfan exposure in male children may delay sexual maturity and interfere with sex hormone synthesis." Increased incidences of cryptorchidism have been observed in other studies of endosulfan exposed populations.

A male will threaten another male by bobbing his head and opening the mouth, displaying the reddish pink interior During territorial fights males headbutt, each attempting to push away the opponent A marine iguana nest hole (center of image) Juveniles on Isabela Island Female marine iguanas reach sexual maturity at the age of 3–5 years, while males reach sexual maturity at the age of 6–8 years. Sexual maturity is marked by the first steep and abrupt decline in bone growth cycle thickness. Marine iguanas can reach an age of up to 60 years, but average is 12 years or less. Reproduction in the marine iguana begins during the last part of the cold and dry season, with breeding from December to March and nesting from January to April.

Females are thought to reach sexual maturity by 170mm standard length. Egg diameter ranges from 0.3mm - 1.6mm, depending on the gonosomatic index (GSI), with larger eggs being present in females with a high GSI.

Sexual maturity in S. p. hefneri begins at about nine months of age. Researchers have found that the majority of males disperse at this time, yet females remain in their home range. S. p.

Female can have up to 10 litters. Young (10-12 per litter) are born blind and naked. Young reach sexual maturity around 60 days after birth. Lifespan of adults is about 8–9 months.

The individuals reach sexual maturity at around ten months, also assumed from similar species, and the midpoint of these ages is inferred for the generation length of O. cobourgianus as four to five years.

If there are more than two chicks the other chicks often do not survive. The chicks fledge properly at around 21 or 22 days old and reach sexual maturity at about a year old.

Sexual maturity is reached at 10 months, and the females usually breed within the first year. Island foxes live for 4–6 years in the wild and for up to 8 years in captivity.

Their pectoral fins are leg-like with extremities resembling a human hand (hence their common name). Females are believed to reach sexual maturity after two to three years at lengths of 75–80 mm.

The eggs hatch in one to four weeks according to temperature, and metamorphosis may occur at twelve weeks, but at higher altitudes, the tadpoles may overwinter. Sexual maturity is reached at about three years.

Sexual maturity for both males and females is reached around 4 to 5 years of age. In the Gulf of Mexico, females live up to 18 years, and males only live up to 16 years.

Following metamorphosis, adult spend around 6 months in fresh water, where they gain sufficient growth and energy to begin investing in reproduction. Males generally reach sexual maturity earlier and at a smaller size than females.

Infants become independent at the age of two and reach sexual maturity at the age of four for females and five for males. Males use genital swelling to communicate that they are ready for sex.

Females attain sexual maturity at around 5years old and at a length of around and the chenge of sex to males occurs when they are around 15 years old and at a mean length of .

97–124 in M. Bekoff, (ed.) Coyotes: Biology, Behavior, and Management. Academic Press, New York. . Hybrids also reach sexual maturity when they are two years old, which is much later than occurs in pure coyotes.

The young leave the pouch after five to 11 months, and are weaned after a further two to six months. Macropods reach sexual maturity at one to three years of age, depending on the species.

The embryos lose their external gills at a length of , have developed colouration by a length of , and are born at a length of . Males and females reach sexual maturity at approximately and long respectively.

Females become sexually mature at about three years of age and can then become pregnant; in comparison, males reach sexual maturity when they are about four years old, although they can produce sperm as early as two years.Martin and Handasyde, pp. 66–69. While the chest glands can be functional as early as 18 months of age, males do not begin scent-marking behaviours until they reach sexual maturity. Because the offspring have a long dependent period, female koalas usually breed in alternate years.

The small size of Ozark hellbender populations combined with their isolation from each other puts them at greater risk of extinction, as does the documented loss of genetic diversity within those populations. They also suffer from very low reproductive rates as a result of their late sexual maturity and long lifespans. Their late sexual maturity makes them more likely to die before reproducing and the time between generations is extended when reproduction does occur. Very low numbers of juvenile Ozark hellbenders in most populations confirm these problems.

Male red-eared sliders reach sexual maturity when their carapaces' diameters measure and females reach maturity when their carapaces measure 15 cm. Both male and females reach sexual maturity at five to six years. The male is normally smaller than the female, although this parameter is sometimes difficult to apply as individuals being compared could be of different ages. Males have longer claws on their front feet than the females; this helps them to hold on to a female during mating and is used during courtship displays.

The females leave their natal group upon reaching sexual maturity, while males usually remain with their group for their entire lives. This is different from South American squirrel monkey species, where either males disperse from their natal group or both sexes disperse. Males of the same age tend to associate with each other in age cohorts. Upon reaching sexual maturity, an age cohort may choose to leave the group and attempt to oust the males from another group in order to attain increased reproductive opportunities.

The Arabian scad is semi-pelagic, demersal fish which forms schools in nearshore waters at depths between , but mostly frequently recorded in waters of less tha depth. It apparently is not recorded where the water temperature is below or where the saturation level of oxygen is less than 30%. Sexual maturity is reached in the fish's first year of life when it attains a length of . In the seas off Oman, however, sexual maturity was attained at about in total length for males and for females.

Females reach sexual maturity at an approximate age of 9 to 10 years, while males reach sexual maturity at an approximate age of 12 to 14 years. The Indian Ocean humpback dolphin exhibits a peak birthing season between the months of May and June, although they are capable of reproducing year round. This peak season, however, confers survival advantages to neonatal calves as it correlates with rising air and water temperatures during the later spring and early summer months. Gestation lasts between 10 and 12 months.

The maximum age for males is around 23 months and 25 months for females. Sexual maturity typically occurs by 12 months of age for most individuals with the exception of a few that will become sexually mature by 24 months of age. The maximum age of a little over 24 months and sexual maturity occurring in most individuals by 12 months of age, suggests no more than two spawning seasons for any individual. Spawning occurs in 16-25 °C waters in late spring/early summer.

After 8-10 days the eggs will begin to hatch and the male will leave. After around 2 days the larvae will begin to swim on their own before reaching sexual maturity at 6-8 months.

Cherry darter spawning peaks in April and early May, and they reach sexual maturity at the age of two. The cherry darter has not been studied extensively, so little else is known of its life history.

Spawning occurs in the autumn. Eggs are deposited over the lake bottom in deep water and develop over three to four months, depending on water temperature. This fish reaches sexual maturity at five years of age.

No parental care of the young has been noted. The silversides reach sexual maturity by the following spring, spawn, and then shortly thereafter most of the adults die off. A few may survive a second winter.

Mothers carry their infants with their mouths to nests and leave them while they forage, returning to nurse their young. Infants are weaned by the 5th week and reach sexual maturity by 20 months of age.

The female gives birth after a gestation period of 170–218 days, usually to a single offspring. The young are weaned at 7 or 8 months of age and reach sexual maturity at around 3 years.

In domestic canines, sexual maturity (puberty) occurs between the ages of 6 to 12 months for both males and females, although this can be delayed until up to two years of age for some large breeds.

Breeding in P. spiloides takes place from April to July. Females reach sexual maturity at 7–9 years of age. They deposit 5 to 27 eggs around mid-summer, and the hatchlings usually emerge in September.

Metacarcinus anthonyi reaches sexual maturity after 10–12 molts. Mating typically takes place in June, and occurs shortly after the females have molted. Before molting, females release a pheromone which induces courtship behavior in the males.

They reach sexual maturity at approximately three years. Mating occurs in October with usually two cubs born in February, while the mother is still hibernating. The offspring usually stay with their mother into the second year.

The species reaches sexual maturity at the end of its first year of age, spawning in batches between December and February The species is taken as bycatch with other species of whiting and shrimps in Australia.

Duncker & Humblot, Berlin. 1954. They hatch in about a month. The tiny slugs which emerge from the eggs need at least two years to reach sexual maturity. The lifespan of Limax maximus is 2.5–3 years.

The teeth are much larger, like canines. The body is more pigmented. This small fish is also known to reach sexual maturity very quickly, at about 42 to 67 days of age.Kon, T. and T. Yoshino. (2002).

Once mature, the typical female Kodiak bear can range in body mass from and from sexual maturity onward, males range from .Troyer, W.A. & Hensel, R.J. (1969). The Brown Bear of Kodiak Island. Kodiak National Wildlife Refuge Report.

By the end of their first week, young are well furred. They open their eyes at about 12 days of age. They are weaned at 3 weeks. Male southern bog lemmings reach sexual maturity in 5 weeks.

Birth length is 80–90 cm. Adults are about 2.5 m long and weigh 120 kg. Sexual maturity is reached at 10 years in females and 12 years in males. The average lifespan is around 40 years.

The minimum total length for a gravid female is about . It seems that sexual maturity is achieved in 2–3 years. In one case, it took a specimen nearly 4.5 hours to give birth to 11 young.

The gray brocket reaches sexual maturity around 18 months old.Black-Dècima, P. 2000. Home range, social structure, and scent marking behavior in brown brocket deer (Mazama gouazoubira) in a large enclosure. Mastozoologia Neotropical, 7(1): 5-14.

Little is known of the New Caledonian stingaree's natural history. It is presumed to be aplacental viviparous, bearing small litters, like other members of its family. Newborns measure roughly long; males attain sexual maturity at roughly long.

Reproduction is slow, as gray silverfish reach sexual maturity at the age of two to three years. They will reproduce for at least three years. The related firebrat reproduces only once a year and in irregular intervals.

Females reach sexual maturity after as little as three weeks, while males become sexually mature after six weeks. The lifespan is correspondingly short, with individuals living for less than a year, even in the absence of predators.

The eyes open 11 days after birth. At 18 days, the kittens begin to leave the burrow. Sexual maturity in bucks is attained at four months, while does can begin to breed at three to five months.

Immature birds have shorter bills. The head and neck are feathered in juveniles. The call is a long croak. The Australian white ibis reaches sexual maturity in three years, and can reach twenty-eight years of age.

Night snakes mate in the spring, and females lay a clutch of 2–9 eggs from April to August. Eggs hatch in 7 to 8 weeks, usually in late summer. Males reach sexual maturity after one year.

In some instances, submissive males are tolerated by the resident male for short periods of time; however, they rarely remain in the group for more than several days. Young males have been observed to leave their natal groups anywhere from two to four years of age. However, one study showed that most juveniles left before they were three, which is before most males reach sexual maturity. This contrasts with an earlier study in which juveniles were observed to leave later, at sexual maturity, indicating that there may be variation between groups.

It becomes flight-ready after five or six months when it reaches an estimated forearm length of and weight of , respectively 86.3% and 41.2% of their adult dimensions. Males begin to mature at 15 months of age and are sexually mature by 27 months; females reach physical maturity at 24 months, and sexual maturity by 28 months. This is one of the oldest ages of maturation of any known bat. For example, the grey- headed flying fox reaches sexual maturity at 16 and 11 months for males and females respectively.

Females lay pale yellow sticky eggs which adhere to the gravel, weed and stones in flowing water. Sexual maturity in chub is influenced by environmental factors with males reaching sexual maturity at the age of 2–4 years while females reach it at 4-6 although some individuals may mature much later than this. The fish can live for up to 22 years in the wild, where the age of fish can be assessed through by the number of rings that are visible in scales, these represent seasonal growth patterns.

The stout whiting reaches sexual maturity by the end of its second year of life, with around 50% of fish accomplishing this after only one year. The fish are around 13 cm once they reach sexual maturity. The patterns of spawning and movement of the juveniles differs between the eastern and western populations. In the western population, unlike many co-occurring sillaginids, stout whiting do not move inshore to spawn and the juveniles do not make their way to shallower waters; instead they spawn offshore, with the fish spending their entire lives in this environment.

Their analysis showed that while juveniles were rare in the fossil record, subadults in the rapid growth phase and adults were far more common. Over half of the known T. rex specimens appear to have died within six years of reaching sexual maturity, a pattern that is also seen in other tyrannosaurs and in some large, long-lived birds and mammals today. These species are characterized by high infant mortality rates, followed by relatively low mortality among juveniles. Mortality increases again following sexual maturity, partly due to the stresses of reproduction.

At sexual maturity, the male shell becomes slightly larger than the female's. Males have been found to greatly outnumber females in practically all published studies, accounting for 60 to 94% of all recorded individuals at different sites. The lifespan of nautiluses may exceed 20 years, which is exceptionally lengthy for a cephalopod, many of whom live less than three even in captivity and under ideal living conditions. However, nautiluses typically do not reach sexual maturity until they are about 15 years old, limiting their reproductive lifespan to often less than five years.

Weaning and sexual maturity of the subspecies Neotoma albigula venusta in western Arizona, Sonora, and Baja California occur earlier: young are weaned between 27 and 40 days, and reach sexual maturity 80 to 87 days after birth. In Joshua Tree National Monument, California, young white-throated woodrats establish their own dens by August and September, several months after birth. Descriptions of the home range of the white-throated woodrat are lacking. The home range of 1 immature female white-throated woodrat on the Coconino National Forest, Arizona, was 47,760 ft2 (4,437 m2).

The young reach sexual maturity at six to eight months of age, and typically begin to leave when 11 months old. The side-striped jackal is among the few mammal species that mate for life, forming monogamous pairs.

This species occurs in Singapore, Malaysia,Daston M. M. & Copeland J. (1993) "The luminescent organ and sexual maturity in Dyakia striata". Malacologia 35(1): 9-19. abstract Cambodia, the Philippines, Fiji, and some islands in the Rhio Archipelago.

Virtually nothing is known of the dwarf black stingray's natural history. It is presumably aplacental viviparous, with the developing embryos sustained by maternally produced histotroph ("uterine milk") as in other stingrays. Males attain sexual maturity at around across.

Crotalus unicolor at the Columbus Zoo and Aquarium. Males reach sexual maturity in four years; females in five. After a gestation time of four months, females give birth to between five and fifteen live young at a time.

Juvenile P. esculentus live in seagrass beds, and reach sexual maturity at a carapace length of around . Adults grow up to long, and resemble Penaeus monodon, albeit smaller and browner. They live offshore at depths of up to .

Individuals reach sexual maturity by age two. While lifespans typically do not exceed six or seven years, some individuals may have extraordinarily long lives. A greater horseshoe bat individual was once banded and then rediscovered thirty years later.

Males of this species reach sexual maturity at small sizes (below 0.7 kg), allowing them to begin reproducing quickly following birth. This implies that some males may be able to reproduce as young as two years of age.

After both sexes have reached full sexual maturity copulation occurs, after which the male dies. The female then loses all external segmentation and grows drastically in size. Both temperature and salinity are important factors to ensure successful reproduction.

The life history of the Mexican salamander Ambystoma ordinarium Taylor. Herpetologica, 27, 165-176.cited at At sexual maturity, these salamanders measure between 70 and 75 mm SVL. Terrestrial adults reach a maximum size of 86 mm SVL.

Saithe reach sexual maturity at 4–9 years old and are iteroparous, batch spawners with determinate fecundity. Females produce, depending on their size, between 500 thousand and 9 million eggs which are 1.0 to 1.3 mm in diameter.

The snail darter reaches sexual maturity at one year. The snail darter life span is 2 to 4 years, depending on predation and access to the breeding ground. More research on the snail darter life history is needed.

Unusually for snakes, their mother may remain with the newly hatched juveniles for a few days. Males and females reach sexual maturity at approximately 5 years of age, when they reach a length of 50 and 65 cm, respectively.

On the other hand, Bristol Bay blackfish are much slower growing and longer lived. Four- year-old fish are approximately in length, but can live up to 8 years. Female blackfish have been shown to reach sexual maturity at .

Lifespan around 4–5 years. Sexual maturity is reached in their second year. Breeding takes place in spring after they wake from winter hibernation. 1-5 eggs are laid, each around 9x15mm, in cracks in rocks or under stones.

It can produce 2 to 3 litters (2 to 4 young per litter) of young each year after a gestation period of 8 weeks. The young wean at 3 weeks old and reach sexual maturity at 9 months old.

Larvae are becoming more demersal as they are approaching competency. Kelletia kelletii is slow-growing, and slow to mature. Studies have suggested a growth rate of 0.3 to 0.4 inches (7 to 10 millimeters) per year until sexual maturity.

There is scant natural history information on the painted swellshark. Like other Cephaloscyllium species, it is capable of taking in water or air to increase its girth when threatened. In males, sexual maturity is attained under a length of .

The mode of reproduction is both sexual and asexual. S. muticum reaches sexual maturity in the summer when gamete production takes place in receptacles. The species is monoecious, i.e. an individual is capable of producing male and female gametes.

Females reach sexual maturity at a length around , while males are mature at . The young hatch from their eggs into planktonic larvae. These pass through five moults before reaching the postlarval stage, when they settle to the sea-floor.

They gain a bright yellow cast on their undersides by a length of , which turns to orange by a length of . The golden color is brightest in sharks long, and tends to fade with the onset of sexual maturity.

6 Dec. 2015. The larvae period lasts around 1–2 years. It generally takes 3–4 years to mature for breeding, and males reach sexual maturity earlier than females. Unfortunately, not much is known about their expected life-span.

She writes that a father will sometimes break his relationship with his daughter when she approaches the age of sexual maturity. Helene later attributed her father's resistance to his subservience to his wife and desire for peace at home.

The kits remain in the family burrow for 2.0-2.5 months. The kits begin to disperse from July or later, and attain sexual maturity at the age of 10 months. They reach adulthood at the age of two years.

P. carteri reaches sexual maturity in roughly 10 months. Adult females lay 1–2 hard shelled eggs that are incubated at 28 °C (82.4 °F) for 70–90 days. Each neonate hatches out at a total length of about .

The larvae hatch after a week to ten days. In the aquarium they reach sexual maturity between 9–12 months old and may have a lifespan of up to 4 years. The spawning season runs from November to January.

Egg, Collection Museum Wiesbaden This eagle lays 1–3 eggs in a tree nest. Generally territorial, juveniles spend some time with their parents after fledging, until they reach sexual maturity and seek out a territory and a mate of their own.

It avoids humans in the natural environment. Agitated males raise the hairs on their backs.ebcc Lifespan and gestation period are unknown, although sexual maturity is reached at three years of age, which is relatively late compared to other canid species.

Breeding occurs roughly between March and April, with births about three months later. Most births are singletons, with only about 5% being twins. Weaning occurs at six to eight weeks of age, and females reach sexual maturity in their first year.

Adultery is forbidden in order to uphold is mission to protect the livelihood of its citizens. Rape, is extremely unacceptable in this country. The age of sexual maturity is fourteen. (13) Both women and men can be considered the culprit.

During this period, the juveniles sing the female form of call, and regularly engage in play behaviour. Northern white-cheeked gibbons reach sexual maturity at seven or eight years, and have lived for at least 28 years in the wild.

The species undergoes a protandrous sex change starting as juveniles, becoming hermaphrodites and ending as females progression. They first reach sexual maturity as hermaphrodites which function as males and there is no evidence which suggests that females develop directly from juveniles.

Also in contrast to those two species, young leopard whiprays across have still not developed the dorsal denticle band. Sexual maturity is attained at across for males. Known parasites of this species include the tapeworms Parachristianella indonesiensis and P. baverstocki.

Newborns measure about across, comparable to H. uarnak and larger than H. leoparda. Also like H. uarnak but unlike H. leoparda, by a disc width of juvenile rays have a well-developed dorsal denticle band. Males reach sexual maturity at across.

Kittens are weaned between six and seven weeks of age. Queens normally reach sexual maturity at 5–10 months, and males at 5–7 months. This varies depending on breed. Kittens reach puberty at the age of 9–10 months.

Tarpons breed offshore in warm, isolated areas. Females have high fecundity and can lay up to 12 million eggs at once. They reach sexual maturity once they are about in length. Spawning usually occurs in late spring to early summer.

Males leave their birth group, usually before they reach sexual maturity, whereas most females stay in the same group for their lives. Baboons in captivity live up to 45 years, while in the wild they average between 20 to 30 years.

This catfish is sexually dimorphic. At a young age the sexes differ mainly in coloration; males are mottled, females are plain. Once sexual maturity is reached, however, males grow a large dorsal spine. Males can reach a 20 cm total length.

Nature, 409(6823), pp. 1001-1006. The delay to sexual maturity introduces delayed density dependence in many instances. In this case there is density dependent inhibition applied to organisms when they are sexually immature.COOKE, K.L., ELDERKIN, R.H. and HUANG, W., 2006.

Spawning habitat characteristics of Great Lake fishes. Canadian Manuscript Report of Fisheries and Aquatic Science 2368: v-48. The water levels substantially rise before spawning and stabilize afterwards. The sexual maturity of bigmouths is mostly unknown and likely varies with latitude.

As in other stingrays, it is presumably aplacental viviparous with the developing embryos being nourished via maternal histotroph ("uterine milk"). Females can produce litters of up to 13 pups. Males and females reach sexual maturity at approximately and long respectively.

Little is known of the natural history of the Chesterfield Island stingaree. It is presumably aplacental viviparous with a small litter size, as in other members of its family. Newborns measure around long and males reach sexual maturity at under long.

Lear's macaw's rate of reproduction is one or two eggs per year during their mating season from December to May. However, not all pairs of birds mate often or at all. Juveniles reach sexual maturity around 2–4 years of age.

Long-bone histology enables researchers to estimate the age that a specific individual reached. A study by Eva Griebeler etal. (2013) examined long-bone histological data and concluded the Apatosaurus sp.SMA0014 weighed , reached sexual maturity at 21years, and died aged 28.

Hatchlings are usually first observed between late August and early October (pers. observ.). The time required to reach reproductive maturity in the field is unknown, but captive L. z. pulchra required 4–5 years to reach sexual maturity (McGurty 1988).

The caudal fin is also silvery white. At maximum length, the albacore is the smallest of the bluefin tuna. It reaches sexual maturity at and its common length is only slightly larger at . Males and females exhibit no sexual dimorphism.

The lines also showed a general slowing of the growth after the fifth year. This could have been an indication sexual maturity was reached at that age. If so, the onset of maturity was about two years later than with Maiasaura.

Males and females of the black-banded sea krait reach sexual maturity at snout-vent lengths (SVL) of , respectively. Females lay 3–7 eggs that hatch after 4–5 months. L. semifasciata can reach a total length (including tail) of .

Girella cyanea is a fast-growing and long-lived fish, with the oldest observed specimen being 41 years old. It is believed they transition into sexual maturity between 2 and 5 years of age or when they reach in length.

Kids are killed when they are 35 days old for their white, curly pelts. Zhongwei reach sexual maturity at 5–6 months of age, and are typically mated at 18 months of age with a kidding percentage of 104-106%.

In captivity studies, it has been discovered that most of the hybrids do not follow Haldane's Rule, but sometimes hybrid females die before they reach sexual maturity, thereby supporting the case for the American black duck being a distinct species.

The saddled madtom has not been researched enough to determine things such as when, where and how often it breeds, how long it takes to reach sexual maturity, or the life span of the species. Using sister species, such as Noturus elegans, crypticus, and baileyi, we can gather a general idea of its life history. Based on the sister species, the saddled madtom breeds between late May and August, breeding on rocks and gravel substrate. The average brood size would be around 50 and the average life span would be two years, reaching sexual maturity after the first year of life.

Dugong mother and offspring from East Timor A dugong reaches sexual maturity between the ages of eight and eighteen, older than in most other mammals. The way that females know how a male has reached sexual maturity is by the eruption of tusks in the male since tusks erupt in males when testosterone levels reach a high enough level. The age when a female first gives birth is disputed, with some studies placing the age between ten and seventeen years, while others place it as early as six years. There is evidence that male dugongs lose fertility at older ages.

In some seasons, as many as 65% are unable to reach three months of age, possibly due to falls and related injuries, although in some seasons infant mortality is as low as 0%. For those that do survive to adulthood, sexual maturity is attained at 18 to 20 months in females and 32 to 48 months in males. Sexual maturity may take longer to reach in the wild compared to captivity. For females, the inter-birth interval, or time between successive offspring, is typically one year, and in captivity, females can remain reproductively active until the age of 23.

The snowy grouper is found at depths of between over rock substrates in offshore waters, although they are commonest between .. The juveniles are found in shallower, coastal waters and are frequently found along the northeastern coast of the United States. Like most groupers this species is predatory and prey items recorded for adults include fishes, gastropods, cephalopods, and brachyuran crustaceans. They are protogynous hermaphrodites and form aggragations for spawning. Females attain sexual maturity at ages between 3 and 5 years old and total lengths of , changing to males 3 to 4 years after attaining sexual maturity as females.

The brown rat can breed throughout the year if conditions are suitable, with a female producing up to five litters a year. The gestation period is only 21 days, and litters can number up to 14, although seven is common. They reach sexual maturity in about five weeks. Under ideal conditions (for the rat), this means that the population of females could increase by a factor of three and a half (half a litter of 7) in 8 weeks (5 weeks for sexual maturity and 3 weeks of gestation), corresponding to a population growing by a factor of 10 in just 15 weeks.

Trout cod reach sexual maturity at 3 to 5 years (which corresponds to about 35 cm in males and 43 cm in females). Trout cod reach sexual maturity at a smaller size than Murray cod, which is an adaptation to the rocky, low nutrient and often quite small upland habitats trout cod were found in. Spawning of trout cod has never been observed in the wild and is not well understood. It is believed to be essentially the same as Murray cod but occurs about three weeks earlier and at significantly lower temperatures in waters shared by the two species.

They begin to take solid food at three weeks, and are fully weaned some time after the first month. The young initially have soft greyish-brown fur, which darkens and becomes rougher as they age. They reach sexual maturity at around three years.

American marten reach sexual maturity by 1 year of age, but effective breeding may not occur before 2 years of age. In captivity, 15-year-old females bred successfully.Strickland, Marjorie A.; Douglas, Carman W.; Novak, Milan; Hunziger, Nadine P. (1982). "Marten: Martes americana".

The young are fully grown, with an adult set of teeth, by six months, reaching sexual maturity within a year of birth. Most Brazilian gracile opossums do not survive for much longer than a year, but some can reach two years of age.

Estimation of the size at sexual maturity of the bat ray (Myliobatis californica) in northwestern Mexico through a multi-model inference. Fisheries Research, 231 Bat rays are euryhaline, i.e. they are able to live in environments with a wide range of salinities.

The common logperch does not reach sexual maturity until approximately 2 years of age. The common logperch spawns numerous times in the warmer months of the year, typically during spring and summer.Platania, S. 1990. Reports and verified occurrence of logperches in Colorado.

Females reach sexual maturity in their first year of age but usually do not breed until their second. Males usually mate in their third year of life. The life- span the Siberian roe deer does not usually exceed 10 years. in Sokolov (1992).

Ewes reach sexual maturity at 230 days old and weigh approximately 49 kg. Ewes lamb at eight-month intervals in February and October; the length of gestation is typically 147 days. About 65% of ewes produce multiple births. Ewes lamb without difficulty.

In some species, they may form pendulous structures of erectile tissue, such as the "snood" of the domestic turkey. Caruncles are sometimes secondary sexual characteristics, having a more intense color or even a different color, developing as the male reaches sexual maturity.

Mudpuppies take six years to reach sexual maturity. Mating typically takes place in autumn, though eggs are not laid till much later. When males are ready to breed, their cloacae become swollen. Males deposit their spermatophores in the substratum of the environment.

In addition, their pups are toxic as soon as they are born. They reach sexual maturity at three years of age. It is also common for females to give birth at communal den sites with the young born between August and October.C. virdis.

They breed year round, usually having one to three litters per year and one to three young per pregnancy. Gestation last around 76 days and the young are weaned from the mother within 33 days. They reach sexual maturity at 133 days.

They can be a challenge to breed for the novice. These fish are cave spawners and will spawn under terracotta pot saucers or in large snail shells. They are a rather slow growing Lamprologine taking approximately two years to reach sexual maturity.

The thinlip splitfin is dark brownish above and paler below. It has 10 dorsal spines, 9 dorsal soft rays, 2 anal spines, and 9 anal soft rays. It attains a maximum size of total length , reaching sexual maturity at a total length of .

As in other stingrays, the Jenkins' whipray is aplacental viviparous: the developing embryos are sustained at first by yolk, which is later supplanted by histotroph ("uterine milk") produced by the mother. The newborns measure across, and males reach sexual maturity at across.

A lack of mating scars has been found on mature females. Unlike females, males reach sexual maturity at a much smaller size. The male-to-female ratio of the scalloped hammerhead is 1:1.29. Females probably are capable of giving birth annually.

The Animal Files with medians of (B.b. bison) and (B.b.athabascae) in males, and with medians of medians of in females, although the lowest weights probably representing typical weight around the age of sexual maturity at 2 to 3 years of age.Castelló, J.R. (2016).

Little information is available on the natural history of the circular stingaree. It is aplacental viviparous, with the developing embryos sustained by maternally produced histotroph ("uterine milk"). Judging from related species, litter sizes are probably small. Males attain sexual maturity at below long.

They share similar characteristics of gestation length (four months), age of sexual maturity, female dominance, life expectancy (18 years) and propensity for sunbathing while stretched out on a branch. They differ distinctly in colouration and markings, except for having universally totally black faces.

The young remain in the yolk sac for another week, then they feed on insect larvae and small crustaceans. Young gar typically lead solitary lives and sexual maturity is achieved around three years of age when the gar reaches about in length.

Males reach sexual maturity at the age of 48 to 60 months. The average lifespan for Siberian tigers ranges from 16–18 years. Wild individuals tend to live between 10–15 years, while in captivity individuals may live up to 25 years.

Pups are thought to be weaned around 6 weeks and reach sexual maturity at 3 years. Their typical lifespan is 25 to 30 years. Not much is known of the Caribbean monk seal's reproduction. They likely bore a single pup every two years.

When adult, the colors may vary from yellowish orange to deep red. Tomato frogs will reach sexual maturity in 9–14 months. Females are larger than males and can reach 4 inches in length. Males can reach 2 to 3 inches in length.

Burnie D and Wilson DE (Eds.), Animal: The Definitive Visual Guide to the World's Wildlife. DK Adult (2005), Kingdon, Jonathan Kingdon Guide to African Mammals (1993) Mandrills can live up to 31 years in captivity. Females reach sexual maturity at about 3.5 years.

The Gambian pouched rat reaches sexual maturity at 5–7 months of age. It has up to four litters every nine months, with up to six offspring in each litter. Males are territorial and tend to be aggressive when they encounter one another.

The bonnethead shark is viviparous. Females reach sexual maturity around , while males reach maturity around . Four to 12 pups are born in late summer and early fall, measuring . Bonnetheads have one of the shortest gestation periods among sharks, lasting only 4.5–5.0 months.

Their biphasic life cycle includes an aquatic state of seven to 16 months, followed by a semi- terrestrial adult stage. The northern dusky salamander attains sexual maturity at approximately three to four years of age. Life expectancy is 10 to 15 years.

Life cycle of P. hawaiensis that takes about two months at 26 °C. Females produce embryos every 2 weeks once they reach sexual maturity. Embryogenesis is relatively short, lasting about 10 days at . Females normally brood the embryos in a ventral brood pouch.

The young are occasionally taken by hyenas and lions. Sexual maturity is reached from 5 to 7 years old for females, and 7 to 8 years for males. The life expectancy in natural conditions (without poaching pressure) is from 35 to 50 years.

Audubon Field Guide. Retrieved 7 October 2019. Chicks will come back to the nest for several weeks after hatching and will eventually follow the adults at sea where they spend the winter. Kittiwakes reach sexual maturity at around 4–5 years old.

Baby bearded dragon The age of sexual maturity has not been measured, although it is estimated to be about one or two years.DPIPWE (2011) Pest Risk Assessment: Central bearded dragon (Pogona vitticeps). Department of Primary Industries, Parks, Water and Environment. Hobart, Tasmania.

Sexual maturity is generally attained between 2 and 4 years,O'Brien, L., J. Burnett, and R. K. Mayo. (1993) Maturation of Nineteen Species of Finfish off the Northeast Coast of the United States, 1985-1990. NOAA Tech. Report. NMFS 113, 66 p.

Pandalus Marine Macrofauns Genus Trait Handbook. Retrieved 2011-11-04. Their lifespan is typically three to five years, with sexual maturity being reached at an early age. Members of this genus are protandric hermaphrodites, starting life as males and later becoming females.

Includes a photograph and detailed description of the species. Observations of captive animals suggest the Chinhai spiny newt is a late-maturing, long-lived species: they reach sexual maturity at 10 years age or later, and their lifespans are at least 20 years.

A female has between 8 and 10 litters during her life. The young (8–14 rat pups per litter) are born blind and naked. Young reach sexual maturity around 50 to 60 days after birth. The lifespan of adults is around a year.

They feed on zooplankton and bottom-dwelling crustaceans in summer. Males and females reach sexual maturity at two or three years. The mating takes place every one to two years. The spawning takes place in depth in the vicinity of underwater springs.

Gestation lasts between 40 and 60 days and one or two offspring are born. The young are born in a highly developed state and are weaned by their mothers after 15–25 days; the young reach full sexual maturity close to 50 days after birth.

They have orange heads and black bodies, in contrast to the much more subdued coloring and yellow heads of females, juveniles, and immature males. Males that reach sexual maturity also have enlarged testes when compared to those of males that have not done so.

As they reach sexual maturity, Trowbridge shrews gain whole body mass. Non- breeding shrews weigh around while breeding shrews average around . The size of the testes in males increases, while the uterine horns widen in females. Once the breeding season has concluded, these structures atrophy.

They are nursed for about 1.5 years. The young calf stays with its mother for three to five years, until it reaches sexual maturity, and often serves to help raise subsequent generations for those years. Wild camels sometimes breed with domesticated or feral camels.

The young tend to grow rapidly, reaching sexual maturity between the ages of 4 and 10 years. Bog turtles live for an average of 20 to 30 years in the wild. Since 1973, the Bronx Zoo has successfully bred the bog turtle in captivity.

Males reach sexual maturity at across and two years of age, and females at and three years of age. This species may live up to 10-12 years. One of the most prolific rays, its intrinsic population growth rate is up to 31% a year.

Eggs hatch at different times and the young ones immediately leave the nest site. After hatching around November the froglets are grown-up enough to move around and be easily detected in January and February. Callulina dawida reaches sexual maturity within eight months of hatching.

At 29 °C (84 °F) the incubation time was 55 to 57 days. Hatchlings measured in snout-to-vent length and in tail length and had a mass of 0.23 to 0.25 g. Sexual maturity is reached in 1.5 to 2 years in captivity.

Even after this occurs, it has been observed that young blue-throated macaws will stay with their parents up to a year. During this time, the parents will skip an entire breeding season. Blue-throated macaws reach sexual maturity at about 5 years of age.

Parturition usually occurs in June. The litter size is usually one young, called a pup, though in some populations, twins are regularly produced. Females nurse their pups through July; pups are usually weaned by August. Females reach sexual maturity at one year of age.

Bearded seal pup Bearded seals give birth in the spring. In the Canadian Arctic, seal pupping occurs in May. In Svalbard, bearded seals reach sexual maturity at 5 or 6 years of age. Further south, in Alaska, most pups are born in late April.

Females never exhibited territorial behavior in the field, but were seen defending feeding areas in the aquaria. Sexual maturity is reached at 1 year with a maximum lifespan of 3 years, though most individuals do not live that long and die off after spawning.

The pouch opening is 3.5mm long and 2mm wide. A thin skin fold covers the teats and is held firmly against the abdomen. The sub-adult, female paucident planigale experiences changes during its first breeding season when sexual maturity is reached at 5 months old.

The eyes open after 14 to 19 days and the pups first emerge from the nativity den shortly thereafter. The young are weaned at around four weeks and reach sexual maturity at one year. They can live for up to 10 years in captivity.

The maximum observed age is 28 years. Sexual maturity is reached at approximately 18 years for females and 14 years for males. The sex ratio is slightly skewed toward female. Like most skates, the graytail skate is oviparious, laying paired eggs with horn-like projections.

Long-bone histology enables researchers to estimate the age that a specific individual reached. A study by Griebeler et al. (2013) examined long bone histological data and concluded that the diplodocid MfN.R.2625 weighed , reached sexual maturity at 23 years and died at age 24.

This gravid proglottid contains the fertilized eggs, which are sometimes expelled with the feces. However, most of the time, the egg may also settle in the microvilli of the small intestine, hatch, and the larvae can develop to sexual maturity without ever leaving the host.

Red deer mating juvenile Female red deer reach sexual maturity at 2 years of age.Clutton–Brock, T. H., and T. Coulson. "Comparative ungulate dynamics: the devil is in the detail." Philosophical Transactions of the Royal Society of London B: Biological Sciences 357.1425 (2002): 1285–1298.

Offspring are born without developed spines, which form within a few weeks. Weaning occurs around 4–6 weeks. Sexual maturity is reached around 12 months. The average life span is 2–5 years while in captivity lifespan can reach as much as 10 years.

The gestation period is 28 days. An average of 5.4 pups are born in each litter. They reach sexual maturity at 325 days. There is little information on the longevity of these animals but one wild born specimen lived to approximately 8.9 years in captivity.

The ovaries become a dark orange color and eggs are visible on the surface. Embryonic development occurs in 24–26 hours. Eggs are pelagic and in length. Sexual maturity is reached at 2 years of age and around in length for both males and females.

The pups emerge tail first, and their cephalofoils remain folded until after birth to facilitate passage through the cloaca. The newborns measure in length. Sexual maturity is reached at around long for males and long for females. The maximum lifespan is at least 21 years.

The organism has a head to body length 14–25 cm with a short tail of 1–3 cm. It weighs 310-435 g. The bare-bellied hedgehog reaches sexual maturity in about 10 months and gives birth to 4-6 young per litter.

Aside from the mother, all other adults leave the nest when the litter is born. Newborn golden mice have a rapid growth and development rate and are able to achieve independence by three weeks of age, with sexual maturity following within a few weeks.

Newly hatched young are able to jet propel themselves round and squirt ink, much like their parents. In just 14 weeks, the hatchlings are 75% of their full-grown size and in just 140 days, male hatchlings reach sexual maturity, and 150 days for females.

Breeding takes place in the spring. 20 to 30 eggs are laid in late spring and summer, and hatchlings appear after 85 to 88 days in summer and early fall. Sexual maturity is reached after about 2 years with a life expectancy of 20 years.

Vermont: Chelsea Green Publishing Co.. The calves grow rapidly and can soon accompany their mothers in the nursery herds. Their horns grow rapidly and begin to show in 3.5 months. They are weaned after six months and reach sexual maturity at about 20 months.

Once settled, females rarely migrate. New juveniles can usually join groups easily. As they reach sexual maturity, they usually lose their "eyespot" on their dorsal fin. P. amboinensis is a protogynous species - all individuals start out as females and later can turn into males.

Newborns grow quickly, and reach full adult body weight after about 10–13 weeks, and will usually leave the parental harem after about 16 weeks. All females will reach sexual maturity by the time they're one year old, and males will reach sexual maturity within the first two years of being born. Mothers will communicate with their offspring though vocalization, and it has even been shown that a mother can discriminate between the calls of its offspring and the offspring of other females. They exhibit more maternal approach behaviors when hearing the calls of their own offspring, and more experienced mothers show more approach behavior as opposed to new mothers.

Liza carinata is a pelagic and euryhaline species, which is also tolerant of wide temperature variations, occurring mainly in marine coastal waters migrating inshore to lagoons and estuaries where there is abundant macrophyte vegetation in the spring, moving out to deeper coastal waters in the winter. The juveniles are associated with drifting seaweed. A study in the Great Bitter Lake found that the lifespan of L. carinata is normally three years but that the most rapid growth occurs in the first year of life. Males reach their first sexual maturity at 12.5 cm in total length while the females attain sexual maturity at 13.4 cm.

Attainment of sexual maturity in Tarebia granifera is generally indicated by the size of the smallest snail observed to give birth rather than a histological assessment of the development of the gonad and associated reproductive structures. Appleton & Nadasan (2002) estimated onset of maturity at 10–12 mm shell height but unpublished data suggest a height closer to 8 mm in line with other published studies. Tucker Abbott (1952) estimated sexual maturity at between 5.5 and 8.0 mm at different stations over a short stretch of river in Florida. Chaniotis et al. (1980) gave a similar estimate of 6.0–7.0 mm from a cohort of laboratory-bred snails in Puerto Rico.

Over half of the known T. rex specimens appear to have died within six years of reaching sexual maturity, a pattern which is also seen in other tyrannosaurs and in some large, long-lived birds and mammals today. These species are characterized by high infant mortality rates, followed by relatively low mortality among juveniles. Mortality increases again following sexual maturity, partly due to the stresses of reproduction. One study suggests that the rarity of juvenile T. rex fossils is due in part to low juvenile mortality rates; the animals were not dying in large numbers at these ages, and so were not often fossilized.

A juvenile smalltooth sawfish being released Relatively little is known about the reproductive habits of the sawfish, but all species are ovoviviparous with the adult females giving birth to live young once a year or every second year. In general, males appear to reach sexual maturity at a slightly younger age and smaller size than females. As far as known, sexual maturity is reached at an age of 7–12 years in Pristis and 2–3 years in Anoxypristis. In the smalltooth and green sawfish this equals a total length of , in the largetooth sawfish at , in the dwarf sawfish about , and in the narrow sawfish at .

Merluccius senegalensis is a bathypelagic and demersal species which prefers to live the over sandy or muddy substrates at relatively shallow depths between about 18m and 500 m. The spawning period most likely takes place from January to March at depths of around 300m and at temperatures of about 12°C. The main prey is fish such as Synagrops microlepis, the Shortnose greeneye (Chlorophthalmus agassizi), the Cunene horse mackerel (Trachurus trecae), mackerel, whiptails, lanternfish and merlucids; as well as crustaceans including Munida iris, Parapenaeus longirostris, Plesionika edwardsii and Plesionika heterocarpus; and cephalopods. Females attain sexual maturity at about 39cm while males reach sexual maturity between 22cm and 28cm.

These are small to medium-sized chameleons. Adult males reach a total length (including tail) of up to and females up to , but more typical lengths are . They have a saw-tooth shaped dorsal ridge and no gular crest. They attain sexual maturity after five months.

Many human activities have negative effects on loggerhead sea turtle populations. The prolonged time required for loggerheads to reach sexual maturity and the high mortality rates of eggs and young turtles from natural phenomena compound the problems of population reduction as a consequence of human activities.

Gestation is 5–6 months. Litter size is usually one, but, occasionally, two pups may be born. Bats are typically full-grown at 15 months. Females are able to reproduce at 12 months old, while males reach sexual maturity after this but before 18 months of age.

Similarly, a wide range of studies from southern Africa found that the average length for females at the onset of sexual maturity was .Bourquin, S. L. (2008). The population ecology of the Nile Crocodile (Crocodylus niloticus) in the Panhandle Region of the Okavango Delta, Botswana. Doctoral dissertation.

Ball python eggs incubating Females are oviparous and lay three to 11 rather large, leathery eggs. They incubate them underground with a shivering motion. They hatch after 55 to 60 days. Young male pythons reach sexual maturity at 11–18 months, and females at 20–36 months.

A single account exists of a pregnant female long that contained four late-term foetuses each long; the young were similar in form and colouration to the adult, but had thicker discs. Males reach sexual maturity at around in length, and females at around in length.

Females carry their eggs until they hatch. Upon hatching, the juvenile spiders remain in their mother's web. They cooperatively capture and feed on prey caught in the web. Upon reaching sexual maturity, the young spiders leave the web, move a short distance away and exhibit solitary behavior.

The diet of the blurred lanternshark consists of squid, smaller dogfish sharks, lanternfishes, and fish eggs. Reproduction is ovoviviparous, with developing embryos being sustained by a yolk sac and being born live at a length of . Males attain sexual maturity at around long, and females at long.

Consider the Lake Sturgeon as but one example. Lake sturgeon are huge fish—they can grow up to three meters long and exceed 190 kg in weight. The females mature slowly and require decades to reach sexual maturity. It was once an abundant species in Lake Ontario.

The female is typically larger than the male by . Males attain sexual maturity at and females about . In the Gulf of Mexico in the 1950s, the mean weight of oceanic whitetip sharks was . In the 1990s, the sharks of the species from the same area averaged only .

Females grow at about half the rate of males, probably due to the energetic demands of egg laying. Sexual maturity is reached at a carapace width of in females, and in males. Longevity is typically 25–30 years, although exceptional individuals may live up to 100 years.

Mole skinks reach sexual maturity after one year. They mate in winter; the female lays three to seven eggs in spring in a shallow nest cavity less than below the surface. The eggs incubate for 31 to 51 days, during which time the female tends the nest.

Males and females of the subdivision P. macdonellensis reach sexual maturity at about 350 days of age. A single gestation period takes about 43 days in the females, and produces a single litter of about six. The interval in between gestation periods is about 365 days.

Females reach sexual maturity when they are long, and grow up to long; males reach only . Unpublished records exist of individuals up to long. Despite being the largest species, B. gigas has the proportionally smallest eyes of any species in the family, and possibly in all Anostraca.

Ecological niche modeling as a predictive tool: Asiatic freshwater fishes in North America. pp. 133-134. University of Kansas. Sexual maturity is reached when five to six years old and at least long. The maximum size reached by this fish is in lengthFishing World Records: Myxocyprinus asiaticus.

While they may be in the earliest stages of sexual maturity, they are considered too young to be breeding stock. Yearlings may be further defined by sex, using the term "colt" to describe any male horse under age four, and filly for any female under four.

Since 2001, the age of consent in Albania is 14, regardless of gender and sexual orientation. In the case of a girl, however, sex is illegal if she is over 14 but has not reached "sexual maturity", as provided by article 100 of the criminal code.

The chicks leave the nest about 84 days after hatching. and are independent in 15–18 weeks. Juveniles reach sexual maturity in 3–4 years. As part of the courtship behavior, the male ruffles his feathers, spreads his tail feathers, extends his wings, and erects his crest.

Long-bone histology enables researchers to estimate the age that a specific individual reached. A study by Griebeler et al. (2013) examined long-bone histological data and concluded that the Camarasaurus sp. CM 36664 weighed , reached sexual maturity at 20 years and died at age 26.

Most species are primarily frugivorous and several are nectarivorous. Other less common food resources include leaves, pollen, twigs, and bark. They reach sexual maturity slowly and have a low reproductive output. Most species have one offspring at a time after a pregnancy of four to six months.

Even at this stage, the black colouration of the unpaired fins will be incompletely developed, and it will not be until sexual maturity is achieved (approximately 8 to 9 months after hatching) that the black border on the anal fin will become a reliable gender differentiation characteristic.

This species is ovoviviparous, with males carrying eggs in a brood pouch before giving birth to live young. Individuals reach sexual maturity at . The specific name and the common name honours the Indian physician, linguist and ichthyologist Dr. Surgeon-Major Atmaram Sadashiv "Muscati" Jayakar (1844-1911).

Bird-Banding, 42:103-105. Birds may not breed for another year or two, and are often vagrants ("floaters") until they establish their own territories. Based on the development of the bursa, great horned owls reach sexual maturity at two years of age.Weller, M. W. 1965.

Males attain sexual maturity at long, and females at long. Their lifespan has been estimated to be 25-30 years in the wild. There have been two reports of female zebra sharks producing young asexually."Zebra shark at centre of 'virgin birth' mystery" (January 5, 2012).

Florida sand skinks are most active in spring, during their mating season. They reach sexual maturity after one to two years and remain reproductively active for two to three years. About 55 days after mating, the female lays about two eggs, which hatch in June or July.

While O. agassizii exists across a wide depth range, heavier octopuses generally live 700 meters or more from the ocean's surface. As age and sexual maturity correlate with weight in this species, this means octopuses at a greater depth are more likely to be sexually mature.

Lambs are vigorous, keen to suck and have a rapid growth rate. Ewe lambs can be bred at seven months, when they reach sexual maturity. Birth weights average 5.0 kg (11 lbs) for singles, 4.0 kg (9 lbs) for twins and 3.5 kg (8 lbs) for triplets.

The eggs are pelagic and are laid upstream after the fish migrate there, they hatch after around 30 hours. The male guards and fans the eggs. They attain sexual maturity when they reach a length of about . A female of length may lay up to 100,000 eggs.

The infants remain hidden with their mother for the first two weeks of life, before rejoining the herd. The age of sexual maturity in goas is unknown, but is probably around 18 months. Goas have lived for up to five years and seven months in captivity.

The bursa of Fabricus is a globular or spherical lymphoepithelial organ. The inner surface is littered with folds, which resemble Peyer's patches in mammals and obscure the lumen. Its growth is correlated with the rapid body growth. It regresses and disappears about the time of sexual maturity.

Once reaching sexual maturity in the Atlantic Oceans, the female Loggerhead makes the long trip back to her natal beach to lay her eggs. The Loggerhead sea turtle in the North Atlantic cover more than 9,000 miles round trip to lay eggs on the North American shore.

The river darter attains much of its adult size during the first year of development, and reaches sexual maturity by the age of one. Males tend to develop faster and become larger than females. The average lifespan of a river darter is between 3–4 years.

The infant will stay with the mother for 18–24 months. After males reach sexual maturity, they are expelled from their natal group. The male must then invade a foreign group. There, the male kills off the other leader and whatever offspring the first leader sired.

Spawning can also occur throughout the warm months. Eastern oysters can reach sexual maturity at four months old.Smithsonian Marine Station at Fort Pierce The eastern oyster has a complex reproductive cycle. The cycle begins during late summer and autumn months with the storage of glycogen energy reserves.

The gestation period is roughly 200-220 days and females bear only one fawn at a time. The young stay with the mother, keeping concealed until large enough to accompany her. They are normally weaned around six months of age and reach sexual maturity after a year.

It is insectivorous, feeding primarily on moths. Moth species in the Saturniidae, Noctuidae, and Geometridae families seem to be preferred. Males and females both reach sexual maturity at around one year of age and a body mass of . Females are monoestrous, with one breeding season per year.

When a colony is in a new location with an inferior food source, the ratio will be biased towards more females, which will disperse from the colony at sexual maturity. Once the food supply has been increased, the brood sex ratio is shifted towards future helping males.

This species is common in estuaries, usually in eelgras beds, but has also been found offshore to depths of 110 m. Sexual maturity is reached at 12 cm, and breeding occurs from March to November. Males carry the developing embryos in a brood pouch on their belly.

The dark freckled catshark (Scyliorhinus ugoi) is a catshark of the family Scyliorhinidae. It is found in Northeastern and Southeastern Brazil. This species differs from Scyliorhinus besnardi, Scyliorhinus haeckelii group and Scyliorhinus hesperius, in background coloration, head width, sexual maturity, and in cranial and body proportions.

Black marsh turtles reach sexual maturity at five years. Nesting season occurs in the summer, between April and the end of June. In courtship, males will bob their heads up and down while chasing a female. It may bite the legs of the females several times before mating.

Their eyes open after 25 days, with weaning occurring after five weeks. The kits begin hunting after eight weeks of age, but stay close to their mother until autumn, when they become independent. Sexual maturity is attained during the kit's first spring, when they are about 10 months old.

Young reach sexual maturity the following spring. Though not known, it is expected that like other relatives, the Lodgepole chipmunk exhibit a polygynous system of mating. Also, parental investment rests solely on the mother as the father of the litter does not provide parental care to his offspring.

Their eyes open at around 12 days, and the kittens begin to take solid food at two months, around the time that they begin actively climbing. Marbled cats reach sexual maturity at 21 or 22 months of age, and have lived for up to 12 years in captivity.

Herrings reach sexual maturity when they are 3 to 5 years old. The life expectancy once mature is 12 to 16 years. Atlantic herring may have different spawning components within a single stock which spawn during different seasons. They spawn in estuaries, coastal waters or in offshore banks.

The number of teeth range from 48 to 61 on each side of its upper and lower jaw. The La Plata dolphin weighs up to , and lives for up to 20 years. Sexual maturity is reached between two and three years. Females have a two-year reproductive cycle.

A young scimitar oryx A young scimitar oryx with its mother Both males and females reach sexual maturity at 1.5 to 2 years of age. Births peak between March and October. Mating frequency is greater when environmental conditions are favorable. In zoos, males are sexually most active in autumn.

They feed on zooplankton and bottom-dwelling crustaceans in summer. Males and females reach sexual maturity at two or three years. The mating takes place every one to two years. The spawning takes place either winter or summer at a depth of in the vicinity of underwater springs.

Yellow perch typically reach sexual maturity in 2–3 years for males and 3–4 years for females. They are iteroparous, spawning annually in the spring when water temperatures are between . Spawning is communal and typically occurs at night. Yellow perch are oviparous, as eggs are fertilized externally.

The kittens start hunting with their mother at the age of 60 days, and start moving independently after 140–150 days. Lactation lasts 3–4 months, though the kittens eat meat as early as 1.5 months of age. Sexual maturity is attained at the age of 300 days.

The bluestripe snapper reaches sexual maturity at . Spawning occurs throughout most of the year in lower latitudes, with peak activity reported for November and December in the Andaman Sea. Its eggs measure from in diameter and hatch when temperatures reach 22 to 25 °C (72 to 77 °F).

Veterinary Immunology: An Introduction. 6th ed. Saunders. Ewes are often revaccinated annually about 3 weeks before lambing, to provide high antibody concentrations in colostrum during the first several hours after lambing. Ram lambs that will either be slaughtered or separated from ewes before sexual maturity are not usually castrated.

Sexual maturity is reached between 2.5 and 3 years. Male involvement in infant rearing is limited, although the entire troop, regardless of age or sex, can be seen caring for the young. Alloparenting between troop females has been reported. Kidnapping by females and infanticide by males also occur occasionally.

The young fish stay on or near the shallow breeding area and grow to about in their first year. Sexual maturity is usually achieved by age two. Pumpkinseeds have lived to be 12 years old in captivity, but in nature most do not exceed six to eight years old.

It reaches sexual maturity in the first full summer after metamorphosis. Breeding season begins in early spring and lasts through the summer. Females lay 2,000–4,000 eggs in small masses attached to underwater vegetation. Eggs are 1.5 mm when laid, but grow to 6 mm as cells divide.

Some vixens may reach sexual maturity at the age of 9–10 months, thus bearing their first litters at one year of age. In captivity, their longevity can be as long as 15 years, though in the wild they typically do not survive past 5 years of age.

Collins, P. M. and Tsang, W. N. (1987). Growth and reproductive development in the male treeshrew (Tupaia belangeri) from birth to sexual maturity. Biology of reproduction 37(2): 261–267. The young remain in the nest for 33 days on average, developing gradually before they exit the nest.

Young can eat solid food after two weeks and are weaned when they are four weeks old. While young of either sex commonly explore their surroundings, natal dispersal tends to be greater in males. Sexual maturity occurs at seven or eight months for females and six months for males.

Hippocampus spinosissimus is an ovoviviparous species, with the female using an ovipositor to transfer eggs to an enclosed brood pouch on the male's stomach. The male then fertilizes and protects the developing embryos before giving birth to tiny () independent young. Individuals reach sexual maturity when they are around .

H. anomala breeds from April to September / October. Sexual maturity occurs in 45 days; life span is about 9 months. Females become ovigerous at and produce 2 to 4 broods per year. Brood size is correlated with female length and ranges from 6 to 70 embryos per individual.

Black Katy chitons are primarily dioecious, diploid organisms. They reach sexual maturity at about 35mm in length. The decrease in temperature experienced around fall will trigger within a newly settled organism the growth of the gonads. Around springtime, the increase in temperatures will trigger the actual production of gametes.

The "scalpel" does not appear until they are about 13 mm long. As the "scalpel" grows, the anal and dorsal spines shrink. Once the fish reaches around 25 mm in length, it moves to the bottom where it continues to grow, eventually reaching sexual maturity in roughly nine months.

Sexual maturity is reached at about one year, when the fish is 80 to 100 mm in length. Spawning season is in the fall and winter. Eggs are broadcast in the water by the female, then fertilized by the male. The number of eggs varies from 7,000 to 90,000.

As ephraye mature, the tentacles elongate and become filiform. Medusae reach larger bell diameters, additional tentacles form and oral arms elongate. Gastric system develops in a centrifugal direction. After roughly 9 months (under laboratory conditions), sexual maturity is achieved and reproduction can be achieved within the water column.

Gundis make chirp-like sounds to communicate with each other. If alarmed, they thump their hind feet as well. A gundi reaches sexual maturity at the age of nine to twelve months. The gestation period is estimated to be 57 days and the litter size averages just under two.

They reach sexual maturity 1.0-1.5 yr after metamorphosis which occurs between 4.5 and 5.0 yr. This species feeds on small insects and spiders. Although it is found over a large area, it is not a migratory creature. It is preyed on by Pacific giant salamanders and garter snakes.

Poultry Science vol.52:2012-2013 but classification is more precise when the chickens are five months old or more. At this point differences between normal and dwarf sibs is evident in all males and in 98% of the females. Dwarfs chickens reach sexual maturity and reproduce normally.

Egg, Collection Museum Wiesbaden Sexual maturity is attained at one year. Breeding season in the northern hemisphere lasts from March to June, peaking in April. During this time these owls may gather in flocks. During breeding season, the males make great spectacles of themselves in flight to attract females.

Spiders from the north have a two-year cycle, having to go through two hibernations before reaching sexual maturity. Spiders in Western and Central Europe have a mix of both one- and two-year cycles. Males have a two-month period to reproduce; females three and a half.

Mimic shiners are reported to only live a total of three years, and are suspected to reach sexual maturity after one year. In lakes, fish spawn in large schools located over beds of aquatic plants.Moyle, P.B. 1973. Ecological Segregation Among Three Species of Minnows (Cyprinidae) in a Minnesota Lake.

D. parva have been breed in captivity. But due to wētā being captured at different ages and conditions, breeding pairs were hard to establish. Young wētā come to sexual maturity successfully in captivity but some fail to lay eggs. Females lay eggs in the soil with an ovipositor.

A P. tetrazona close to sexual maturity The tiger barb usually attains sexual maturity at a body length of in total length, or at approximately six to seven weeks of age. The females are larger with a rounder belly and a mainly black dorsal fin, while the males have a bright, red nose with a distinct red line above the black on their dorsal fins. The egg-layers tend to spawn several hundred eggs in the early morning in clumps of plants. On average, 300 eggs can be expected from each spawn in a mature broodstock population, although the number of eggs released will increase with the maturity and size of the fish.

Nearly complete skeleton of a subadult Gorgosaurus libratus, from the Royal Tyrrell Museum of Palaeontology The end of the rapid growth phase suggests the onset of sexual maturity in Albertosaurus, although growth continued at a slower rate throughout the animals' lives. Sexual maturation while still actively growing appears to be a shared trait among small and large dinosaurs as well as in large mammals, such as humans and elephants. This pattern of relatively early sexual maturation differs strikingly from the pattern in birds, which delay their sexual maturity until after they have finished growing. By tabulating the number of specimens of each age group, Erickson and his colleagues were able to draw conclusions about life history in tyranosauridae populations.

Sexual maturity can be reached at 3 years. But on average, females give birth for the first time at 7 years old and give birth every 26 months thereafter. Males attain reproductive maturity at 10 years old. The Panamanian white-faced capuchin has a long life span given its size.

It is solitary and territorial. Female pygmy shrews give birth to litters of one to ten, hairless young with closed eyes. Their eyes open at 13 days and they are weaned at 20 days. The young reach sexual maturity at two to three months and live for 12 to 18 months.

P. pirinampu may reach a length of 60–75 centimetres (24–30 in) and an average weight of 3–5 kilograms (6.6–11 lb). This species has a maximum published weight of 7.68 kg (16.93 lb). These fish reach sexual maturity at just under 60 cm (24 in) in length.

Thoburnia rhothoeca reach sexual maturity after one to two years of life. The sucker reproduces through spawning, which generally occurs from February to May. Female suckers lay an average of approximately 780 oocytes during spawning season with an average diameter of approximately two millimeters. The sucker is primarily a carnivore.

Sexual maturity is attained at a length of for both sexes, corresponding to around five years of age for males and seven years of age for females. Mature sharks exhibit negligible growth rates, perhaps due to resources being diverted towards reproduction. The maximum lifespan is estimated to be 15 years.

Upper body of a teenage boy. The structure has changed to resemble an adult form. Puberty is a period of several years in which rapid physical growth and psychological changes occur, culminating in sexual maturity. The average age of onset of puberty is at 11 for girls and 12 for boys.

Southern saratoga can grow up to 90 cm (4 kg). At sexual maturity they are usually 48–49 cm in length. They are primitive, surface-dwelling fish with strongly compressed bodies. They have an almost perfectly flat back, with a dorsal fin set back towards the tail of their long bodies.

The young develop in shallow inshore waters. They grow rapidly at first, increasing in length by about during their first year, but growth slows down thereafter. Females reach sexual maturity at two to three years and live for a maximum of seven years, while males live up to five years.

The offspring consist of only P. kl. esculentus. P. kl. esculentus hybrids (RL) can mate also with each other, but only 3% of resulting tadpoles (RR) survive to sexual maturity (97% do not). The genomes of interhybrid crosses are female, because of carrying X chromosomes of females from primary hybridisation.

Histological observations confirm anatomical evidence of neoteny in branchiosaurids. Skeletochronological analysis allows for the identification of sexual maturity (i.e. when the distance between lines of arrested growth (LAGs) suddenly decreases). In Apateon specimens determined to be sexually mature, the cartilaginous Katschenko's line can be observed when perichondral ossification is complete.

The domestic ferret is known to be affected by several distinct ferret health problems. Among the most common are cancers affecting the adrenal glands, pancreas, and lymphatic system. Viral diseases include canine distemper and influenza. Certain health problems have also been linked to ferrets being neutered before sexual maturity was reached.

They can ovulate and conceive within two to four weeks after giving birth, and ovulation is not inhibited by lactation. Females generally reach sexual maturity between 12 and 17 months, and males between 15 and 25 months. Emilia's marmoset, Mico emiliae, sometimes interacts with the brown-mantled tamarin, Saguinus fuscicollis.

The bursa of fabricius, also known as the cloacal bursa, is a lymphoid organ which aids in the production of B lymphocytes during humoral immunity. The bursa of fabricius is present during juvenile stages but curls up, and in the sparrow is not visible after the sparrow reaches sexual maturity.

Adults attain sexual maturity by the end of their second summer. A female can be expected to generate approximately 50 to 120 eggs per breeding season, which remain attached to the mother for the entire winter. Studies on other family members suggest a lifespan for this species of several years.

Gestation would last 10–11 months, delivering one calf at a time; the interbirth interval was 2 years. Calves measured around at birth, and nursed for 8–20 months. Males reached sexual maturity at age four, females at age six. Mature males were about (7.5 ft) long, females , the longest specimen .

After the sexual maturity they are initially females and later they turn into males. Usually the groupers with a length of 16 cm are still females. These fishes usually spawn from January to April and the spawning begin 2 to 3 days before full moon and last about 3–4 days.

Drawing of Crossarchus obscurus. Due to their hierarchical social structure, only the primary members of a family group are permitted to breed. Subordinate offspring are often killed and eaten by the more dominant members of the group. Sexual maturity is reached between nine months of age to a year old.

Western gray squirrels reach sexual maturity at 10 to 11 months, and at approximately one year of age, will begin breeding. They mate over an extended period ranging from December through June. Young are born after approximate 44-day gestation period. Juveniles emerge from nests between March and mid-August.

At sexual maturity, N. vexillosa’s body is transformed into a heteronereid or epitoke. This body form is full of gametes and its sole purpose is reproduction. Epitokous worms leave their burrows and enter the water column in spawning swarms. This spawning activity marks the end of the organism’s life cycle.

Usually only one fawn weighing about 2.2 kg is born after a gestation period lasting over 7 months. At 6 weeks, they can eat solid food and begin to follow their mother. They stay with their mothers for at least a year, and also reach sexual maturity at about a year.

Males have thicker necks than females and have generally darker brown pelage. Male seals have golden tipped thick guard hairs on the back of the head, neck, and shoulders. This seal species has a trait called sexual dimorphism, meaning the males look much different from the females after reaching sexual maturity.

In the wild, mountain goats usually live 12 to 15 years, with their lifespans limited by the wearing down of their teeth. In zoos, however, they can live for 16 to 20 years. Mountain goat kid at Cawridge, Alberta Mountain goats reach sexual maturity at about 30 months.D. Chadwick (1983).

The first litter is born in September and the second in December or January. The offspring from this breeding season reach sexual maturity at 6 months but don't begin reproducing until the following year. Males are heavier than females indicating sexual dimorphism likely caused by male-male competition for mates.

Adult females can reach in snout–vent length. Males reach sexual maturity at about in snout–vent length. The tympanum is discernible, but the tympanic annulus tends to be covered by spinose warts. The parotoid glands are prominent and covered by dark-tipped spines, except in males in full breeding condition.

This is a carnivorous species and its diet comprises aquatic insects, crustaceans and fish, although they have been recorded feeding on terrestrial vertebrates and invertebrates. Sexual maturity is attained at lengths of around. It is thought that the females lay demersal eggs which are guarded and fanned by the males.

N.flavipinnis reaches sexual maturity at two years of and usually lives through two breeding seasons. Often, they use backwater pools and streams that are as clean and siltless as possible to breed and bury their eggs beneath rocks.Virginia Tech Fish and Wildlife Information Exchange, 1996. "Madtom and Yellowfin" (On-line).

Virtually nothing is known of the natural history of the mitotic stingaree. It is presumably aplacental viviparous, with the developing embryos sustained by histotroph ("uterine milk") produced by the mother, like other stingrays. The litter size is probably small, as in related species. Males reach sexual maturity at a length of .

Virtually nothing is known of the natural history of the Aden Gulf torpedo. Like other members of its family, it has well-developed electric organs for defense and perhaps also stunning prey. This species is presumably aplacental viviparous like other electric rays. Both sexes attain sexual maturity at between long.

This provides restrictions on its capabilities for recovering from an even minor population decline. When young are produced, they brood in the female's gill chamber. Sexual maturity requires approximately two years, and the life span is approximately four years. Typhlichthys subterraneus is listed as near threatened on the IUCN Red List.

It is dioecious; upon reaching sexual maturity, its white-flowered inflorescence appears in Spring. The fruit capsules are around 80 mm in length, containing light-brown, spherical to oblong seeds 2–3 mm in diameter. After blooming, the plant's main trunk dies and multiple lateral trunks emerge to take its place.

Egg, Collection Museum Wiesbaden Sexual maturity is reached at about two years old. Breeding generally occurs during May but is variable depending upon dates of arrival at breeding grounds. The rough-legged hawk is thought to be monogamous, mating with a single individual for multiple years. No evidence currently suggest otherwise.

Females reach sexual maturity at about two years of age. Their long spawning season lasts all spring and summer, during which time females produce up to a million eggs. The larvae go through six stages in about four weeks before emerging as juvenile crabs. Their lifespan is seven to eight years.

The northern snakehead can double its population in as few as 15 months. It reaches sexual maturity at age two or three, when it will be about long. The eggs are fertilized externally; a female can lay 100,000 eggs a year. Fertilization occurs in shallow water in the early morning.

In A. dumerili sexual maturity is reached within 3 to 5 years of age. Males have anal spurs, which are used in courtship. The mating season is March through May, and the young are born some 6 to 8 months later. Ovoviviparous, females give birth to a litters of 6-28.

Minke whale skeleton, Museum Koenig, University of Bonn. Heart of a Minke whale (Balaenoptera acutorostrata). The minke whales are the second smallest baleen whale; only the pygmy right whale is smaller. Upon reaching sexual maturity (6–8 years of age), males measure an average of and females in length, respectively.

Neoteny is not a ubiquitous trait of the human phenotype. Human expression timing, compared to chimpanzee, has a completely different trajectory uncovering that there is no uniform shift in developmental timing. Humans undergo this neotenous shift once sexual maturity is reached. A question prompted by the Mehmet Somel et al.

The squid lives at depths of . It attains sexual maturity at about one year old and lives 1 to 2 years, with a maximum life span of about 3 years. It generally breeds only once. The male delivers sperm into the mantle of the female using structures on a specialized tentacle.

The condition was semi-lethal. None of the affected birds reached sexual maturity. It was considered as the result of a dysfunction of the thyroid gland, similar to the human pathological condition known as myxoedema infantilis. Dwarfs of this type were homozygotes for an autosomal recessive gene td (thyrogenous dwarfism).

They reach sexual maturity in about two and a half months. After mating, a copulatory plug is formed in the female's reproductive tract.Breed, W. G. "Copulatory behaviour and coagulum formation in the female reproductive tract of the Australian hopping mouse, Notomys alexis." Journal of Reproduction and Fertility 88.1 (1990): 17-24.

Largescale stoneroller generally reach sexual maturity at one to four years of age. The breeding process starts with the males constructing the nest in gravel bars and rocks in the late winter. The females then come in the spring and lay the eggs while the males fertilize them.Rakocinski, Chester. 1984.

Sexual maturity in P. broadleyi is reached at around snout-vent length for both sexes. Females lay two clutches of eggs in early summer. Males demonstrate a preference for larger female mates, most likely due to the positive correlation between the size of a female and the eggs she produces.

A juvenile in captivity. Note white stripe along top of beak and pale-grey bare facial skin. Captive bred Spix's macaws reach sexual maturity at seven years of age. A paired female born at the Loro Parque Fundación laid eggs at the age of five years, but these were infertile.

These turtles reach sexual maturity sometime between 4 and 6 years of age. They mate at the surface or under water. A male will hold the female's carapace with its forelimbs and may bite at her head, neck, and limbs. Females may retain sperm for almost a year after copulation.

Offspring hatch in June, with juveniles growing to more than half the maximum adult length by October. They reach sexual maturity at one year old. Lifespans likely do not exceed three years. The Halloween darter is a host species for US federally endangered species of freshwater mussel, the gulf moccasinshell.

This species is ovoviviparous, with males brooding eggs in a brood pouch before giving birth to live young. It is reproductively active all year, with males and females reaching sexual maturity at respectively. Brood size can vary significantly, from 114 to 1764, with an average of 604.4 plus or minus 322.8.

The female attains sexual maturity three to four weeks after hatching and starts laying eggs. A single egg is deposited by stabbing the long, sharp ovipositor into the soil at a suitable site. The female will lay from twenty five to eighty eggs. Development depends largely on the ambient temperature.

During winter, the turtle hibernates, usually in the mud at the bottom of water bodies. The turtles mate in spring and autumn. Females dig nests on land and lay eggs between late spring and mid-summer. Hatched turtles grow until sexual maturity: 2–9 years for males, 6–16 for females.

Male fennec fox mounting a female Captive fennec foxes reach sexual maturity at around nine months and mate between January and April. They usually breed only once per year. The copulation tie lasts up to two hours and 45 minutes. Gestation lasts between 50 and 52 days, sometimes also up to 63 days.

They are very alert and non-aggressive. They are primarily grazers, with their diets consisting mainly of grasses. Mating in hartebeest takes place throughout the year with one or two peaks, and depends upon the subspecies and local factors. Both males and females reach sexual maturity at one to two years of age.

Juvenile mountain madtoms are 20-30mm in length usually. Adult mountain madtoms range from 75–127 mm in length and the life span averages 4–5 years. It is uncertain what age they reach sexual maturity due to the secrecy of the species. One study located a nest and eggs were collected.

Juvenile southern flounder stay in estuaries, and most leave to spawn offshore during the fall and winter as adults. Young fish are eventually pushed into the estuaries by ocean currents to mature. Southern flounder reach sexual maturity around two years of age. Older, larger fish tend to begin the spawning migration earlier.

Voles are small rodents that grow to , depending on the species. Females can have five to ten litters per year. Gestation lasts for three weeks and the young voles reach sexual maturity in a month. As a result of this biological exponential growth, vole populations can grow very large within a short time.

Physical maturity is reached by about two years of age, but sexual maturity is not attained for another year or two, and the young may stay with their mother until they are fully mature. Lifespan in captivity is up to or past 20 years of age, possibly due to the slow juvenile development.

Females are usually white or grey and unspotted. Some completely white individuals are known in both males and females. As the young grow, they go through a series of color changes before reaching sexual maturity around one year old. Colouration varies from reds and whites to buffs, browns, light greys, and blacks.

Females typically give birth after a six-month gestation, usually to one infant. The females tend to be the primary caretaker of the young, although several females may share the duties for all of their offspring. Offspring are weaned after about a year. They reach sexual maturity around five to eight years.

Males reach sexual maturity at across, and females at across. The oldest known individual from the wild was ten years of age, but the species has lived up to 21 years in captivity. Known parasites of the common stingray include the flukes Heterocotyle pastinacae and Entobdella diadema, and the tapeworm Scalithrium minimum.

Females have a biennial reproductive cycle, requiring a year for gestation and another year for oogenesis and vitellogenesis after parturition. Lemon sharks reach sexual maturity around 12–16 years of age and have low fecundity. Males tend to mature earlier than females. The maximum number of pups recorded in a litter is 18.

The gestation period lasts 270 days and mothers give birth to 1-2 offspring. The calf remains hidden 6 weeks after birth, after which mother and calf rejoin the herd. The calf is weaned at 3.5 months, becomes independent at 4.5 month, and achieves sexual maturity at 1.5–2 years in both sexes.

Information on reproduction is limited for Heaviside's, however they are thought to be comparable to Hector's and Commerson's dolphins. Females and males reach sexual maturity approximately between 5–9 years. Mating is thought to occur year-round, however individual females may only produce calves every 2–4 years. Gestation time is unknown.

The average life span for Spea hammondii is about 12 years. They reach sexual maturity in their third year. The female spadefoot toad will lay up to 2,000 eggs (per season?). The cordon of eggs attaches to objects in the water or puddles or ditches and the male deposits sperm on them.

Young feed on microcrustaces. It is most likely that introduced rainbow trout and brown trout are the main predators for this species. Sexual maturity is reached after one year and spawning occurs in spring, in fast riffles over gravel substrate. The fish has a maximum life span of at least four years.

Newly born rays measure around across. Females grow slower and to a larger ultimate size than males; sexual maturity is attained at roughly across and two years of age for males, and across and five years of age for females. The maximum lifespan is 12 years for males and 17 years for females.

The lifecycle of T. gigas is relatively long and involves a large number of instars. The eggs are about in diameter. The freshly hatched larvae, known as trilobite larvae, have no tail, and are long. Males are thought to pass through 12 moults before reaching sexual maturity, while females pass through 13 moults.

The gestation period is on average 133 days. The female typically reaches sexual maturity by 2 years of age. Because of competition between males based upon size males usually reach reproductive age later than females. After birth, the mother leaves the young to forage and returns nourishing the young with nutrient rich milk.

This allows them to mate with immature females, which can then store the sperm inside the ovaries until they reach sexual maturity, and the eggs are ready to be fertilised. This unusual adaptation is likely a response to the difficulty of finding a mate in their dark and sparsely inhabited deep-sea environment.

Deer mouse pups usually disperse after weaning and before the birth of the next litter, when they are reaching sexual maturity. Occasionally juveniles remain in the natal area, particularly when breeding space is limited. Most deer mice travel less than from the natal area to establish their own home range.Stickel, Lucille F. (1968).

The juveniles use their rasping teeth to feed on the scales and epidermis of other fishes. The females attain sexual maturity when they reach a fork length of at around 4–5 years old. In Australia spawning occurs from August to March. In the Persian Gulf spawning occurs between March and June.

Rival male Nile crocodiles sometimes kill each other during the breeding season. Growth in hatchlings and young crocodilians depends on the food supply, and sexual maturity is linked with length rather than age. Female saltwater crocodiles reach maturity at , while males mature at . Australian freshwater crocodiles take ten years to reach maturity at .

After leaving the pouch, the mother may carry it about on her back until it is weaned at about seven months of age. The young are independent at nine months, and reach sexual maturity between 18 months and two years after birth. Greater gliders have been recorded living up to fifteen years.

Reported maximum lengths vary from for females and for males. Both sexes typically weigh at sexual maturity, and the maximum weight may be as much as . The minke whale is a black/gray/purple color. Common minke whales (Northern Hemisphere variety) are distinguished from other whales by a white band on each flipper.

Those eggs can often be seen through the ventral surface of the female's body shortly before they are laid. The hatchlings reach sexual maturity between six and 12 months old. Smaller species may live up to 10 years, whereas the larger species have been reported to live more than 20 years in captivity.

Simon, Thomas P. (1987). Description of Eggs, Larvae and Early Juveniles of the Stripetail Darter, Etheostoma kennicotti (Putnam) and Spottail Darter, E. squamiceps Jordan (Percidae: Etheostomatini) from Tributaries of the Ohio River. Copeia 1987:433-442 Stripetails reach sexual maturity one year after birth. The maximum lifespan of this fish is 3 years.

Oxford: Wiley-Blackwell. Although not uncommon in males, females are more associated with parental care.Formhage, L., & Jennions, M. (n.d.). Coevolution of parental investment and sexually selected Since females are on a more limited reproductive schedule than males, a female often invests more in protecting the offspring to sexual maturity than the male.

Their gestation period is 10 to 11 months, with an inter-birth interval of one year. They typically give birth to a single offspring, although twins are possible. Age at sexual maturity is 18 months for males, and three years for females. The maximum known lifespan is 25 years in the wild.

They often release over seven million eggs at once, each about in diameter. Few reach sexual maturity. The planktonic young drift freely in the ocean's pelagic zone. Larvae inhabit the west central Atlantic off the Southern United States, Jamaica, Bahamas, the Dominican Republic, and Puerto Rico, and also the southwest Atlantic off Brazil.

A pair of yellow-tailed black cockatoos at Rotterdam Zoo stopped breeding when they were 41 and 37 years of age, but still showed signs of close bonding. Birds appear to reach sexual maturity between four and six years of age; this is the age range of breeding recorded in captivity.Higgins, p. 71.

Once the larvae reach their maximum size, metamorphosis occurs. Sexual maturity is reached in this species at three to four years old. The adults and juveniles tend to be restricted to the stream edges, hiding under rocks and other debris during the day.Crocker,J.B., M.S. Bank, C.S. Loftin, R.E. Jung Brown (2007).

Unlike most fish, the Asian arowana reaches sexual maturity relatively late, after 3–4 yr. The females produce few eggs, 30-100, which are quite large. After the eggs are fertilized, the Asian arowana exhibits great parental care with paternal mouthbrooding. Both the fertilized eggs and larvae are brooded within the male's mouth.

When the Arenaeus cribrarius reaches sexual maturity around five to seven years of age they begin to mate. Arenaeus cribrarius breed year-round and are polygynandrous.Pinheiro, M., A. Fransozo. 1999. Reproductive behavior of the swimming crab Arenaeus cribrarius (Lamarck, 1818) (Crustacea, Brachyura, Portunidae) in Captivity. Bulletin of Marine Science, 64(2): 243-253.

Blanding's turtle takes 14–20 years to reach sexual maturity. Mating probably occurs in April and early May with nesting beginning in early June and lasting throughout the month. The clutch size varies from region to region. In New York, the clutch size ranges from 5–12 eggs with an average of eight.

By four weeks old, they are foraging for themselves. Young do not reach sexual maturity in their first fall; they do not breed until their second fall. Individuals can live at least 14.8 years in the wild; juveniles have higher mortality rates than adults, and females have higher mortality rates than males.

They are reddish brown to golden brown in colour, though rarely they may also be bright yellow. They are made from closely woven silk. The spiderlings overwinter within the egg sacs until early spring. Females reach sexual maturity at around the middle of January, while males mature earlier in the middle of December.

Age of sexual maturity depends to some extent on time of birth. About 20% of females from the first litter breed during the summer of birth. The remaining 80%, and later litters, breed the following May. Martell and Fuller found that the onset of summer breeding was related to the time of snowmelt.

Mating occurs throughout the year with a gestation period of approximately 277–290 days. Most commonly a single calf is born, but twins are not unknown. Sexual maturity is reached at about eighteen months. Highland cattle also have a longer expected lifespan than most other breeds of cattle, up to 20 years.

Canines have been seen to develop significant resistance to A. caninum naturally with age; this protection develops faster in and fully mature females show substantially greater resistance than fully mature dogs. Specifically the age- related resistance means A. caninum takes longer to reach sexual maturity in older animals and fewer larvae fully develop.

However, female brush mice may reach sexual maturity in about five to 9 weeks. In Arizona, females born in late May or June were found pregnant during August of the same year. In West Texas, Arizona, southern Utah, and Mexico, breeding appears to occur nearly year- round.Schmidly, David J.; Hendricks, Fred S. 1984.

Maternity colonies have also been found in tree cavities and in bat houses. Some females reach sexual maturity at three months of age, but most do not breed until after reaching a year of age. Mating occurs in the fall, but females store the sperm until the spring, which is when fertilization occurs.

Redfin bullies seem obliged to spend their first few months at sea, because no landlocked populations have been found. Juveniles have the best climbing ability of the Gobiomorphus species, but are mostly found in lowland waterways. They reach sexual maturity in their second year and have an average lifespan around 3–4 years.

The coastal taipan is the longest venomous snake in Australia. Adult specimens of this species typically attain sexual maturity around in total length (including tail). More mature specimens can grow to between . Other taipans, including the inland taipan, attain broadly similar sizes although they tend to be slightly smaller in average size.

Thornhill, R., & Palmer, C. T. (2001). A Natural History of Rape. MIT press. Sexually suggestive behavior and biological ornamentation are signs of sexual maturity and thus females who display more of these behaviors, or who have more obvious ornamentation, are more likely to be at a higher risk of harassment, or even rape.

Females give birth to 7-8 pups during the summer; newborns measure long. Sexual maturity is attained at under a length of for males, and for females. It has lived to 20 years old in captivity. A known parasite of this shark is an undescribed species of tapeworm in the genus Carpobothrium.

In fact, recent research suggests TSD has evolved in lizards so as to ensure reproductive success in the offspring. The jacky dragon reaches sexual maturity rapidly. Females can lay clutches within one year of hatching. The average lifespan of the jacky dragon is four years, which is significantly shorter than most lizards.

Indris reach sexual maturity between the ages of 7 and 9. Females bear offspring every two to three years, with a gestation period around 120–150 days. The single infant is usually born in May or June. The mother is the primary caregiver, though the father assists, remaining with his mate and offspring.

This species of skink is oviparous which is a method of reproduction in which the female lays eggs. A female M. boulengeri generally reaches sexual maturity and begins breeding within the first year of life. On average, 3 eggs are laid per clutch, and a female produces approximately 3 clutches per year.

Male silver perch reach sexual maturity at three years of age. Female silver perch reach sexual maturity at five years of age. Silver perch spawn in late spring and early summer. Originally water temperatures of close to 24 degrees Celsius were considered necessary for spawning to occur but as with all Murray-Darling fish species it has become apparent that the "required" spawning temperature is flexible and that they can and do spawn at lower temperatures. Researchers in the Barmah Forest region of the Murray River have collected drifting fertilised silver perch eggs in water temperatures as low as 17.2 degrees and as high as 28.5 degrees C, between early November and mid-February. Eggs were consistently collected in water temperatures above 20 degrees.

A school of blue runner in Spain The blue runner reaches sexual maturity at slightly different lengths throughout its range, with all such studies occurring in the west Atlantic. Research in northwest Florida found a length at maturity of 267 mm, a study in Louisiana showed the species reaches sexual maturity at 247–267 mm in females and 225 mm in males, and in Jamaica lengths of 260 mm for males and 280 for females were estimated. Spawning appears to occur offshore year round, although several peaks in spawning activity have been found in different areas through the species range. Peak spawning season in the Gulf of Mexico occurs from June to August, with a secondary peak in spawning during October in northwest Florida.

The extant species of frilled shark, C. anguineus and C. africana, do not have a defined breeding season, because their oceanic habitats register no seasonal influence from the ocean's surface; the male shark reaches sexual maturity when he is long, and the female shark reaches sexual maturity when she is long. The mature female shark has two ovaries and a uterus, which is in the right side of her body; ovulation occurs fortnightly; and pregnancy ceases vitellogenesis (yolk formation) and the production of new ova. Both ovulated eggs and early-stage shark embryos are enclosed in chondrichthyes, ellipsoid egg-cases made of a thin, golden-brown membrane. Reproductively, the frilled shark is an aplacental viviparous animal born from an egg, without a placenta to the mother shark.

Therefore, it is recommended to only have one or a pair if kept as a pet. They are egg laying lizards producing approximately one to seven eggs. The better condition the female is in, the more eggs she can lay. They reproduce sexually and reach sexual maturity from the ages of two to three.

When the young have hatched, they are cared for by both the male and female. During this period, they can be fed several times their normal portion of feed, which they readily convey to their young. The young begin to fly at about 5 weeks. Sexual maturity is reached at about 2 years of age.

Calf weight, calculated using Robbins and Robbins equation, tends to be between 11.3 and 13.2 kg. The juveniles (referred to as either fawns or calves) have a spotted coat, as is commonly seen in most species of deer. They are known to develop very quickly after birth. They reach sexual maturity at about 14 months.

The river chub lives up to 5 years, reaching sexual maturity in its second year. In late spring the breeding male builds a pebble nest close to the bank of the stream in low to moderate current.McManamay RA, DJ Orth, CA Dolloff, and MA Cantrell. 2010. Gravel addition as a habitat zestoration technique for tailwaters.

It is one of several chameleon species also known to consume plant matter, perhaps as a source of water during the dry season. The lifespan is about 5 years for females, and up to 8 years for males. They reach sexual maturity at four to five months. They breed more than once a year.

Tsessebe reproduce at a rate of one calf per year per mating couple. Calves reach sexual maturity in two to three and half years. After mating, the gestation period of a tsessebe cow lasts seven months. The rut, or period when males start competing for females, starts in mid-February and stretches through March.

In captivity they live up to 18 years, in the wild eight to ten years. They reach sexual maturity at two to three years. Their young, with a birth- weight of approximately 30 grams, are usually born in March or April after a seven-month-long gestation period, in litters of one to five.

There is only one known record of a pregnant female, which was gestating 114 embryos; this ranks among the largest known litters from any shark. The young are probably under long at birth. The length at sexual maturity has not been precisely determined but is thought to be around for males and for females.

During the first year, they have rapid growth, growing up to one millimeter per day. Brook silversides quickly reach a maximum size of approximately eight centimeters. They reach sexual maturity by the first summer in order to reproduce. Some studies report that brook silversides reproduce by internal fertilization, although this has not been entirely confirmed.

The species are brown coloured and have 100 legs, with which, despite the amount, they still move slowly. They are punctuated, but its difficult to spot the dots. It can be found inside the trees, just under the bark. They live a long time and it takes them three years to reach sexual maturity.

They grow rapidly in their first year, increasing in length by an average of . The growth rate subsequently slows, averaging per year by age five. Both sexes attain sexual maturity at three to four years of age, at lengths of roughly for males and females, respectively. The maximum lifespan is estimated to be 20 years.

These fish tend to sit on the sea bed, their bodies propped up by the widely separated pelvic fins. Some of the members of the speciose genus Parapercis, maybe all of them, are sequential hermaphrodites, all being female at sexual maturity and later changing into males which frequently have significantly different colourings and markings.

Embryos develop quickly within the egg capsule and will hatch in response to inundation by rising water levels in the pond basins. The larval period lasts 11–24 weeks, with metamorphs leaving the breeding ponds from April to June. Sexual maturity is approximately 1–2 years for males and 2–3 years for females.

Even in solitary species, home ranges often overlap. Females give birth to one to 12 young after a gestation period of about 20–30 days. Sexual maturity is reached after about 9–15 weeks. Longevity in the wild is usually less than six months, but the record for a captive animal is over five years.

Some jurisdictions permit fishing for fins and food. Sharks are also caught as bycatch when fishing for marlin, tuna and other varieties. Sharks generally reach sexual maturity only after several years of life and produce very few offspring in comparison to other harvested fish. Harvesting sharks before they reproduce has severe impacts on future populations.

An adult male goat weights about 25 to 30 kg and female 20 to 25 kg. It is poor in milk production. It is very popular in Bangladesh because of its low demand for feed and high kid production rate. The Black Bengal goats gain sexual maturity at earlier age than most other breeds.

Generally, males reaches sexual maturity at a smaller size compared with females. Vitellogenesis happens when females are 45 days for the whole population. Both sexes tend to lose body fat during mating period, since their main energy resources come from body fat and from the liver and proximal at the tail. Strasbourg (26 October 2006).

Viviparous, oviparous; Sand boas reach sexual maturity at two to three years of age. Two of these snake species are ovoviviparous (young develop inside egg sacs incubated inside the female's body). The young hatch live after a gestation period of four months inside the female's body. She gives birth to five to 12 offspring.

The initial diameter of medusae is up to 1.4 mm, increasing to 2.5 – 3 mm within two days. Sexual maturity can be reached in 4 weeks, or sooner with optimal conditions. (Note that this data is based on laboratory conditions.) Adults are carnivorous, feeding upon soft-bodied prey such as invertebrate eggs and appendicularians.

The sex ratio is 1:1, but this can vary depending on geography and season. When hatching, juveniles measure up to long. Once they have reached sexual maturity, they only reproduce every other year. They mate in the spring, and during the summer, females lay about 40 egg cases in sandy or muddy flats.

After a gestation period of about 145 days, she gives birth to either a single infant or twins. Males contribute significantly to care of the infants. Sexual maturity is reached at about 2 years, and it can live up to 13 years. Geoffroy's tamarin is classified as being of "least concern" by the IUCN.

The hardhead catfish has a reproductive season from around May to September. Males and females reach sexual maturity before age 2. Females at maturity are around , and males typically are slightly larger, around . At maturity, females develop flap-like fatty tissue by their pelvic fins, which results in them having larger pelvic fins than males.

Like other stingrays, the roughnose stingray is aplacental viviparous; developing embryos are nourished by yolk, later supplemented by histotroph ("uterine milk") produced by the mother. One recorded female was gestating a single late-term fetus. Newborns measure across; males attain sexual maturity at a disc width of , and females at a disc width of .

Eggs hatch between late spring and late summer. Growth of fish in their second and third summers occurs from May or June to the end of July. Growth stops during the fall and winter months due to a slowed metabolic rate. Sexual maturity is obtained late in their first summer or in their second summer.

Both the male and female of the species reach sexual maturity after one year of life. The breeding season occurs in the spring and early summer. The males arrive before the beginning of the season to establish their territories. The males use a series of courtship displays to attract the females to their sites.

They also travel, forage, sleep, and raise infants together, as well as fight together against aggressive conspecifics. Males establish their dominance more forcefully than females. A male disperses, or leaves his natal group and joins another group, after reaching sexual maturity. Adult males are very competitive with each other and fight for access to females.

Distributional status of falconiformes in west central Arizona: with notes on ecology, reproductive success and management. US Bureau of Land Management, Phoenix District Office. However, while adult plumage and technically sexual maturity is attained at two years old, many red-tails do not first successfully breed until they are around 3 years of age.

Most cetaceans sexually mature at seven to 10 years. An exception to this is the La Plata dolphin, which is sexually mature at two years, but lives only to about 20. The sperm whale reaches sexual maturity within about 20 years and a lifespan between 50 and 100 years. For most species, reproduction is seasonal.

A subadult described by David Martill and Darren Naish from the University of Portsmouth in 2006 had not yet fully developed its crest, which supports the suggestion that the crest was a marker for sexual maturity. Comparisons between the scleral rings of Tupuxuara and modern birds and reptiles suggest that it may have been diurnal.

By conservative estimates (e.g. she was a new mother who had just reached sexual maturity in 1935), she was nearly 70 years to more than 100 years of age, if not older. Research on the closely related bowhead whale exceeding 210 years or more suggests this lifespan is not uncommon and may even be exceeded.

The eggs are laid in shallow nests, often in rainforest clearings — both natural and man-made (the verges of roads are particularly popular). The eggs take about 100 days to incubate. Sexual maturity is achieved in around one to two years in lowland populations but probably takes at least a year longer in upland populations.

The diet of the tubemouth whipray likely consists of crustaceans and small fishes. Like other stingrays, it is aplacental viviparous with the developing embryos nourished by maternally produced histotroph ("uterine milk"). One known specimen contained a single near-term pup measuring across. Males attain sexual maturity at under across, and females at under across.

Babies are weaned around 5 to 6 weeks and reach sexual maturity at about 6 to 9 weeks. A female can conceive throughout the year and may produce up to 9 litters in a year. Lifespan for spiny mice is 4 to 7 years. The mother is able to become pregnant right after birth.

Very little is known about this fish, its behaviour and ecology. They reach sexual maturity at a disc diameter of about for females and for males. Their maximum diameter is about . Like other members of the genus they are ovoviviparous, the young developing in the uterus and receiving nourishment from a yolk or uterine secretions.

Age and growth, length- weight relationships, and condition factors of the greenside darter from Silver Creek, Kentucky. Trans. Ky. Acad. Sci. 39:131-134. Swannanoa darters spawn on variable substrates, and these may include vegetation, sand, or rock substrates. Sexual maturity is usually achieved at about one year of age, and growth is rapid.

Foals are able to stand about an hour after birth. The rate of infant mortality among foals is 25%, with 83.3% of these deaths resulting from leading stallion infanticide. Foals begin grazing within a few weeks but are not weaned for 8–13 months after birth. They reach sexual maturity at two years of age.

Proterosuchus grew quickly. It probably reached sexual maturity within a year, at roughly two-thirds of its maximum adult body size. Rapid growth rates were typical of Early Triassic archosauromorphs, and may have been an adaptation to surviving the hostile environment of the Early Triassic. Juvenile Proterosuchus may have hunted different prey from adults.

Carapaces of the eastern variants are often light grey or whitish between the scutes. Their plastrons are mostly dark in a symmetrical mottled pattern. Size tends to be smaller on average than northeastern variants, also reaching sexual maturity at a smaller size. Fore limbs feature a slightly enlarged scale on the side of the 'elbow'.

Like other stingrays, the pink whipray is aplacental viviparous, with the mother supplying her developing embryos with nutrient-rich histotroph ("uterine milk") through specialized uterine structures. The newborns measure across. Shark Bay may be a nursery area for this species. Males reach sexual maturity at across, while the maturation size for females is unknown.

Newfoundland Martens reach sexual maturity at 15 months, breeding once a year. Behavioral interactions and patterns of scent-marking suggest that the female influences the male marking and activity. Marking often happens in the same locations and is thought to facilitate social interaction. The breeding season begins early July continuing until late July to August.

Females are strongly philopatric, meaning that they likely stay in their natal ranges. Therefore, females in a given area are closely related, influencing the social structure of colonies. Females give birth in the summer to an offspring called a pup. Pups are weaned in the summer, and some reach sexual maturity in their first autumn.

Brush mice are nocturnal. Brush mice appear to limit activity during cooler months in the Sierra Nevada of California, although they are not known to hibernate or enter torpor. In southern areas, such as Arizona, Texas, and northern Mexico, brush mice are active year-round. Brush mice reach sexual maturity at 12–19 weeks.

The northern grass mouse is active both day and night. The diet consists of green plant material and seeds. Females reach sexual maturity at 2.7 months and breeding takes place throughout the year with a peak in May and June. The average litter size is five and there are three or four litters per year.

Corythoichthys insularis is a species of marine fish in the family Syngnathidae. It is found in the western Indian Ocean, from the Amirante and Comoros islands to the Maldives. It inhabits coral and rocky reefs at depths of , where it can grow to lengths of . This species is ovoviviparous, with sexual maturity being reached at .

On average, a mature male ranges from 2.2-4.9 centimeters (0.9-1.9 inches) in length, while a mature female is 2.1-3.4 centimeters (0.8-1.3 inches) long. It has two dorsal spines, 26-29 soft rays, and 25-27 anal soft rays. The males develop bristles on their caudal peduncles when they reach sexual maturity.

The ornate wobbegong's upperside is golden brown in colour with blueish-grey areas, and it is yellow-green on its underside. It has two dorsal fins, a large flat head, and small eyes. Its mouth and lower head are covered with flaps of skin. Juveniles are in total length and sexual maturity is reached at .

Male river carpsuckers reaches reproductive maturity at age two to three, while females reach sexual maturity at age three to four. During breeding season, small tubercles can be observed on the body of the male. Reproduction typically occurs during late spring, in large spawning groups.Chang, M.M., Liu, S.Y., Sun, Y.H., Treer, T., Wang, W.M., Xie, C.X. 2007.

Female loggerheads first reproduce at ages 28–33 in Southeastern United States and Australia, and at ages 17–30 in South Africa. Age at first reproduction in the Mediterranean, Oman, Japan, and Brazil are unknown. Nesting loggerheads have a straight carapace length of . Because of the large range, carapace length is not a reliable indicator of sexual maturity.

When not breeding, adults are generally solitary. Adult males hold and defend territories, excluding other males and quite often females, too. Younger birds – juveniles and unmated adults – form flocks on larger bodies of water at some times of year. It is not known at what age they reach sexual maturity in the wild, but it may take several years.

The only plant matter found was a freshwater alga. Males reach sexual maturity around 3–4 years and females reach it around 7–8 years. Females have a clutch size of roughly five eggs and can lay three or four clutches in a year. Nesting occurs from May to August, and occurs nocturnally on a sandbank.

The spotted turtle's karyotype consists of 50 chromosomes. Visual differences between male and female turtles develop around the time of sexual maturity. The male spotted turtle has a tan chin, brown eyes, and a long, thick tail. The chin of the female is yellow; she also has orange eyes and a shorter tail than the male.

Although the pups develop deciduous teeth while still in the womb, these have already disappeared by the time they are born. They begin to fly at about one month of age, and are fully weaned at about three months, when they are close to the adult size. They reach sexual maturity at one or two years of age.

Male and female harpy fruit bats reach sexual maturity within a year. There are two breeding seasons, the first is from January to February and the second is from July to August. The females only have one pup at a time with a gestation period of four to five months. Afterwards they lactate for three or four months.

Eggs are produced from spring to autumn, the offspring reach sexual maturity the following summer, and individuals can live for up to two years. The closest relative of D. sayi is D. texanus, which lives in the Gulf of Mexico; the two species differ in subtle features of the genitalia and the last pair of walking legs.

Thelarche variant, also named exaggerated thelarche, is an intermediate condition between premature thelarche and precocious puberty. This condition resembles premature thelarche without the cyclic waxing and waning of breast growth. Pubic hair growth (pubarche) and advanced bone growth are often present in thelarche variant, yet this growth does not result in complete sexual maturity as occurs with precocious puberty.

She devotes her energies to the children once she does reach sexual maturity. Furthermore, Chodorow examines the psychological development of adult females and males. Chodorow argues that the psyches of men and women are structured differently because of dissimilar childhood experiences. The justification for why women tend to be more empathic is because women's ego boundaries are less fixed.

One to six young are born in each litter, and the female may become pregnant again after a week. Females can have up to three litters in a year, with two being normal. They can also sometimes reproduce in their first year, as they reach sexual maturity before males. Females are solely responsible for the young.

The redtail chub spawns in late spring, and only once per year. Sexual maturity is reached in the second year, when males begin to grow much more rapidly than females, and reach greater sizes. Average clutch size is anywhere from 500-1000 ova. The redtail chub, like all Nocomis species, creates troughs in which to breed.

Breeding season is from March or April until September or October when water temperatures are between 17 and 29 °C. Males develop tubercles on their anal and pelvic fins to aid in fighting for females. Females can produce from 12–122 eggs at a time and reach sexual maturity after a year. They only live 24 to 30 months.

They show the highest amount of growth during the first year of life but do not reach sexual maturity until year two.Simmons Jeffrey W.; Layzer James B.; Smith David D.(2008). Age-class Structure and Variability of Two Populations of the Bluemask Darter Etheostoma (Doration) sp. American Midland Naturalist Volume: 160 Issue: 2 Pages: 300-309.

Average length at sexual maturity was estimated at 215.1 cm and 214.7 cm in males and 201.1 cm and 199.8 cm in females. The mass of mature testis was between 117.4 g to 1300 g. Gestation period was 12.1 to 12.3 years and calving seemed to peak during summer (July/ August). The minimum calving interval was 2 years.

Acomys russatus is an opportunistic breeder that reaches sexual maturity at approximately 58 days of age. There is no mating season for spiny mice, but rather they continue to breed throughout the year. Each female has an average of 3.5 litters per year with about 34 days between litters.Spiny mouse (Acomys cahirinus) longevity, ageing, and life history. Genomics.senescence.

Females typically brood their eggs during this time, exhibiting defensive behavior against smaller predators. Parental care ends a day or two after hatching when hatchlings leave the nest. Young American five-lined skinks, with a potential life span of up to six years, attain sexual maturity and begin reproducing within two to three years of hatching.

This is a long-lived, slow-growing species; males grow faster and reach a smaller ultimate size than females. Sexual maturity is attained at around long and 12 years of age for males, and long and 13 years of age for females. The maximum lifespan is at least 26 years for males and 30 years for females.

Females typically bear litters of three, though individuals gestating up to 9 pups have been reported. The young are born in January or February, following a gestation period of 9-10 months. Sexual maturity is attained at a length of for both sexes. A known parasite of this species is a tapeworm in the genus Cathetocephalus.

Young crabs deliberately attach algae, bryozoans, hydroids, sponges, and other creatures to their exoskeletons as a form of camouflage to hide from predators. Animals larger than cease to decorate themselves. This species stops molting when it reaches sexual maturity, however, and a layer of algae often develops on the long-lived adult exoskeleton, giving these crabs a green appearance.

Broodstock management status and some suggestions to control negative selection and inbreeding in hatchery stocks in Bangladesh. The ICLARM Quarterly, 22(4), 24–27. Pond-reared broodstocks are selected, often as immature juveniles, and grown out in suitable conditions to sexual maturity. These animals require stable water characteristics and a well-balanced, species-dependent, protein rich diet.

The incubation period is about 30 days, in which the male and female take turns incubating. In the first few years of sexual maturity, golden parakeets tend to lay infertile clutches until the age of six to eight. In captivity, golden parakeets resume breeding when their chicks are taken from them.Golden Conure - Breeding URL accessed January 26, 2007.

Marouani, Sondes, et al. “First Data on the Age, Growth and Sexual Maturity of the Piked Spurdog, Squalus Megalops (Chondrichthyes: Squalidae), in the Gulf of GabÃ¨s (Central Mediterranean Sea).” Marine and Freshwater Research, vol. 67, no. 5, 2016, p. 578., doi:10.1071/mf14356. Some females can even measure up to 78 cm which is over 2.5 feet long.

Upon sexual maturity it undergoes self- fertilisation. Fertilized eggs are released through the faeces along with the gravid proglottid which gets detached from the strobila. The number of proglottids released per day may vary from 0 to 35. Cysticercus grows into adult in about 2.5 to 4 months, by the time gravid proglottids are found in faeces.

Urothoe reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited.

Both sexes have pre-anal glands, consisting of moderately sized sweat and sebaceous glands around the anal opening. Large-sized sebaceous and scent glands extend along the full length of the tail on the dorsal side. Male wildcats have pre-anal pockets on the tail, activated upon reaching sexual maturity, play a significant role in reproduction and territorial marking.

Certain health problems have also been linked to ferrets being neutered before reaching sexual maturity. Certain colors of ferret may also carry a genetic defect known as Waardenburg syndrome. Similar to domestic cats, ferrets can also suffer from hairballs and dental problems. Ferrets will also often chew on and swallow foreign objects which can lead to bowel obstruction.

Mating usually occurs in trees on horizontal limbs and can last for several hours. Litters range from one to six pups, which are born blind and toothless (altricial). Infants wean after 4.5 months and are independent after a year. Sexual maturity occurs around three to four years of age, and life expectancy in captivity is 20 years.

The blue-winged macaw attain sexual maturity between 2 and 4 years after they are born. Adult females usually produce two eggs which take approximately 29 days to hatch. Young blue-winged macaws learn to fly about 11 weeks after they have hatched. They stay with their parents for about a year after learning to fly.

The Papuan seerfish (Scomberomorus multiradiatus) also called the Papuan Spanish mackerel, is a species of fish in the family Scombridae. It is endemic to the Gulf of Papua off the mouth of the Fly River. It is the smallest species in the genus Scomberomorus. Sexual maturity is attained at much less than 30 cm fork length.

A significant percentage never make it to the ocean. Little is known of the initial life history of newly hatched sea turtles. Juveniles spend three to five years in the open ocean before they settle as still- immature juveniles into their permanent shallow-water lifestyle. It is speculated that they take twenty to fifty years to reach sexual maturity.

A significant percentage never make it to the ocean. Little is known of the initial life history of newly hatched sea turtles. Juveniles spend three to five years in the open ocean before they settle as still-immature juveniles into their permanent shallow-water lifestyle. It is speculated that they take twenty to fifty years to reach sexual maturity.

Individuals live up to eighty years in the wild. It is estimated that only 1% of hatchlings reach sexual maturity. Each year on Ascension Island in the South Atlantic, C. mydas females create 6,000 to 25,000 nests. They are among the largest green turtles in the world; many are more than a metre in length and weigh up to .

This appears to have been an adaptation to predation pressures, as large eggs would require greater incubation time and thus would be at greater risk. Based on a number of bone histology studies, Diplodocus, along with other sauropods, grew at a very fast rate, reaching sexual maturity at just over a decade, and continued to grow throughout their lives.

Spawning occurs year-round; spawning areas are known to exist in the Caribbean Sea and off the coast of Florida. Males reach sexual maturity at long and females at long. As the fish mature and move into deeper water where there is less available light, they lose the cone cells in their eyes in favor of rod cells.

Cephalopholis taeniops is a demersal species which can be found in shallow rocky reefs and on sandy bottoms. It is a diandric protogynous hermaphrodite. Some of the males do not necessarily have a functional female stage and may develop into males from sexually immature females. The females reach sexual maturity when they attain a total length of .

Young wild boar suckling from an adult female. Here, juvenile colouring acts as a form of camouflage. Juvenile (left) and adult (right) leaves of Stone Pine A juvenile is an individual organism that has not yet reached its adult form, sexual maturity or size. Juveniles can look very different from the adult form, particularly in colour.

Ewes generally reach sexual maturity at six to eight months old, and rams generally at four to six months. However, there are exceptions. For example, Finnsheep ewe lambs may reach puberty as early as 3 to 4 months, and Merino ewes sometimes reach puberty at 18 to 20 months.Jainudeen, M. R. et al. 2000, "Sheep and goats".

Males can reach sexual maturity in their second season, while females usually do not reach maturity until their third year. Specimens in smaller streams are smaller and take longer to mature. H. nigricans may reach up to 33 cm by the end of its fifth growing season. Exceptionally large specimens of this species are usually female.

Sexual maturity is attained around three years of age or at a length around 110 millimeters. It grows in size and weight most rapidly in spring due to increased feeding spurred by the impending spawning season. It spawns over gravel in pools and riffles. Typically when spawning, one female is flanked on each side by two males.

The average length of the reproductive cycle for females is 2–4 weeks. Females reach sexual maturity (puberty) between 8 and 18 months of age. There is a tremendous variability in the maturation age between breeds, and even within a breed of dog. , Dr B Eilts, LSU Veterinary Medicine, "The Normal Canine Estrous Cycle" retrieved 10 April 2013. 1\.

For comparison, charr in Lake Vättern reach sexual maturity (lek for the first time) at 6 to 8 years when the females have reached lengths of 40–55 cm and the males 35–45 cm. The implication of this difference is that Sommen charr either reach maturity later than charr in Vättern, or that they grow faster.

These two group classifications separated the species population in half, which is highly indicative of sexual dimorphism. However, some report that the two groups may actually represent two separate species. Protoceratops, a type of ceratopsian, also shows signs of sexual dimorphism. However, their frills don't seem to develop until later in life, and may be coordinated with sexual maturity.

The black spot larvae grow to sexual maturity in the infected bird's intestine. The adult worms pass eggs with the bird's droppings. When the eggs reach water, they hatch into free-swimming organisms which then penetrate snails for further development. Finally, after leaving the snails they burrow into the skin of fish and form a cyst.

However, they start life fairly small. Newly hatched saltwater crocodiles measure about long and weigh an average of . These sizes and ages are almost identical to those at average sexual maturity in Nile crocodiles, despite that average adult male saltwater crocodiles are considerably larger than average adult male Nile crocodiles.Loveridge, J. P., & Blake, D. K. (1972).

The gestation period in otters is about 60 to 86 days. The newborn pup is cared for by the bitch, dog and older offspring. Bitch otters reach sexual maturity at approximately two years of age and males at approximately three years. The holt is built under tree roots or a rocky cairn, more common in Scotland.

This amphibian was used as a medicine, food and ceremonial object during the Aztec Empire. It was considered to be an incarnation of the god Xolotl, brother of Quetzalcoatl. It has been studied due to its abilities to regenerate limbs and other body parts. It can also reach sexual maturity as a larva, which no other amphibian can do.

Tahoe suckers reach sexual maturity between 2 and 5 years of age, with males tending to mature earlier. Differences in age at which maturity is reached exist between various populations. Those in Pyramid Lake mature several years earlier than those in Lake Tahoe. Fecundity is believed to be related to size, with age being of secondary influence.

These fish are probably somewhere between one and two years of age, well below sexual maturity. Fishermen report that the offshore fishing grounds are productive year-round. However, during summer months, large Yellowfin tuna are more abundant. The weight of the catches are estimated to be about 75% Thunnus obesus (Bigeye tuna), and 25% T. albacares (Yellowfin tuna).

False gharials are mound-nesters. Females lay small clutches of 13 to 35 eggs per nest, and appear to produce the largest eggs of extant crocodilians. Sexual maturity in females appears to be attained around , which is large compared to other crocodilians. It is not known when they breed in the wild or when the nesting season is.

Black neck scales on an adult male The sexes have a comparable snout-to-vent length (SVL) and have similar tail lengths. Mature males have somewhat larger heads than females, which is deemed to be an adaptation for intraspecific competition for territory. Females reach sexual maturity when about 96 mm long (SVL) and males from about 82 mm (SVL).

1878 illustration of a foetus in the uterus Sundarban, India These dolphins are thought to reach sexual maturity at seven to nine years. In the Northern Hemisphere, mating is reported from December to June. Its gestation period is 14 months; cows give birth to a single calf every two to three years. Length is about at birth.

Even many supposed atheists have just secularized and internalized the same old morals.Fraenkel 92, p. 19 The bourgeois ideology has a strong demand that adolescents, having reached sexual maturity, be repressed in sexual abstinence. To justify this sad privation, which is the basis of their unhappiness, all sorts of unscientific and ridiculous justifications have been made up.

Virtually nothing is known of the natural history of the Coral Sea stingaree. It is presumably aplacental viviparous like other stingrays, with developing embryos provisioned with maternally produced histotroph ("uterine milk"). Newborns measure around long; the litter size is probably small based on related species. Males and females attain sexual maturity at under and long respectively.

Females bear litters of 1-5 pups every other year, after a gestation period lasting 14-19 months. Newborn rays measure about long; males attain sexual maturity at around long and females at around long. Its large adult size suggests a relatively slow growth rate. A known parasite of this species is the monogenean Calicotyle urolophi.

The pups measure long at birth, relatively larger than the young of the shortfin mako, and have proportionally longer heads and pectoral fins than the adults. Capture records off Florida suggest that during the winter, females swim into shallow coastal waters to give birth. Male and female sharks reach sexual maturity at lengths around and , respectively.

The female deposits her eggs inside freshwater mussels. The male sheds his sperm into the inhalent current of the respiring mussel and thereby fertilizes the eggs. The young hatch and remain protected within the mussel for about a month, eventually leaving the mussel as actively swimming larvae. Both sexes reach sexual maturity in 1 year, at a length of .

Glitter and Golden (born July 1998) are the twin daughters of Gremlin, fathered by Frodo. They are the only pair of wild chimpanzee twins known to have survived to the age of sexual maturity. Several documentaries have featured Gremlin raising the twins, with help of their sister Gaia. Each of the pair exhibits a different personality.

The rats reached sexual maturity around August and started to breed come October. The species has a litter size ranging from one to eleven on average with a gestation period lasting around 23 to 25 days. Olfactory senses are used to smell certain species odours, allowing them to detect predators.Mcevoy, Joanne, David L. Sinn, and Erik Wapstra.

Juvenile Squalius squalus are gregarious and are found in the shallows of streams, rivers and lakes. They feed on a variety of plant and animal materials. Larger individuals are solitary and the largest mainly feed on fish. Sexual maturity is reached in the second year of life in both sexes and breeding takes place between April and July.

A cow with calf Sexual maturity occurs in the gaur's second or third year. Females have one calf, rarely two, after a gestation period of about 275 days, a few days less than domestic cattle. Calves are typically weaned after seven to 12 months. Breeding takes place year-round, but typically peaks between December and June.

Egg, Collection Museum Wiesbaden A juvenile condor in Colca Canyon, Peru. A young female Andean condor, in Nahuel Huapi National Park, Argentina. Sexual maturity and breeding behavior do not appear in the Andean condor until the bird is five or six years of age. It may live to 50 years or more, and it mates for life.

Captive males and females reach sexual maturity at the age of two years. In Doñana National Park, courtship and mating happens in spring between February and June. Two to three pups are born between mid April and mid August after a gestation of 11 weeks. They are hairless at first, and open their eyes after about a week.

Asexual reproduction is found in nearly half of the animal phyla. Parthenogenesis occurs in the hammerhead shark and the blacktip shark. In both cases, the sharks had reached sexual maturity in captivity in the absence of males, and in both cases the offspring were shown to be genetically identical to the mothers. The New Mexico whiptail is another example.

Males reach sexual maturity at and females at . Typical weight of relatively young sexually mature specimens, which often locally comprise the majority of tiger sharks encountered per game-fishing and scientific studies, is around .Pepperell, J. 1992. Trends in the distribution, species composition and size of sharks caught by gamefish anglers off southeastern Australia, 1961-1990.

Pups leave their parents in late August–September. By October, the pups, which by then resemble adults, unite in pairs. Sexual maturity is reached at 8–10 months. Their longevity is largely unknown; animals 6–7 years of age have been encountered in the wild, while captive specimens have been known to live for 11 years.

Within the aquarium hobby, flowerhorns are not favored because of the difficulty of breeding them. The majority of flowerhorn males are sterile (cannot reproduce), so finding one that can is time consuming. Hobbyists have to wait until 8–10 months for a male fish to reach sexual maturity then pair it with a female to test fertility.

The Puerto Rican amazon reaches sexual maturity at between three and four years of age. It reproduces once a year and is a cavity nester. Once the female lays eggs she will remain in the nest and continuously incubate them until hatching. The chicks are fed by both parents and will fledge 60 to 65 days after hatching.

Little is known about the mating behavior of the small eggar moths, however mating behaviors of closely related moths, like the tent moths of the genus Malacosoma, have been studied. In these other tent moths, and likely in E. lanestris as well, males reach sexual maturity faster than females. Moths copulate by joining ends and facing in opposite directions.

The development of characteristics useful in sexual selection, including competition between males, such as pronounced nasal bosses, occurred when the dinosaur was roughly 73% the size of a full-grown adult. The age of sexual maturity is unknown. Due to the lack of conspicuous growth banding, more detailed analyses of P. lakustai growth rates cannot be performed.

All species are mouthbrooders, the parents holding sometimes hundreds of eggs in their mouths. The young may make several tentative trips outside the parent's mouth to investigate the surroundings before leaving permanently. Unlike most fishes that start reproducing at around six months of age, the Arowana usually takes three to four years to reach sexual maturity.

Females reach sexual maturity in the second year. The mating season is from the end of August, with nursery roosts then becoming occupied the following may with 40-400 females, although rarely any males. The maximum recorded age is 19 years. Most summer nursery roosts are in human buildings, typically in areas such as attics and church steeples.

The diamond stingray has the lowest growth rate of any stingray species yet studied. Males reach sexual maturity at around across and 7 years of age, while females grow slower still, reaching maturity at around across and 10 years of age. The maximum lifespan has been estimated at least 19 years for males and 28 years for females.

The sterlet commonly reaches the age of 22 to 25 years. Males reach sexual maturity at 3–7 years old and females at 4–12 years old. Spawning occurs from the middle of April to the beginning of June. Females may lay from 15,000–44,000 eggs, at water temperatures preferably 12–17 °C (54–63 °F).

It is suggested that due to the longer wings, more nutrients are being allocated to maintain the wings. Which causes long wing morphs to have smaller ovaries and produce fewer eggs. Alternatively, short winged male G. rubens have not been found to reach sexual maturity earlier nor have a difference in reproductive output compared to long winged males.

Furthermore, the variant does not reach sexual maturity like P. yonahlossee, but matures according to size. Males must reach greater than 65 mm and females must be greater than 61 mm before being considered mature.Bartlett, Richard D., and Patricia Pope Bartlett. Guide and Reference to the Amphibians of Eastern and Central North America (north of Mexico).

The age when sexual maturity is gained has been given differently by different studies. Wilson observed that females become mature before 13 months, and the minimum age was found to be eight months. He noted that males take longer to mature, nearly 11 to 14 months. The species is monogamous, with pairs remaining together throughout the year.

Endemic sturgeons of the Amur River: kaluga, Huso dauricus, and Amur sturgeon, Acipenser schrenckii. Environ. Biol. Fish. 48(1/4):231-239. They are also among the longest-lived of the fishes, some living well over 100 years and attaining sexual maturity at 20 years or more.Berg, L.S. (1962). Freshwater fishes of the U.S.S.R. and adjacent countries.

Continually occupied nest structures may reach up to two metres in height. Nests can be as wide as 2 meters and weighing about 135 kg. Generally, eastern ospreys reach sexual maturity and begin breeding around the age of three to four years. Eastern ospreys usually mate for life, although polyandry has been recorded in several instances.

Females reached sexual maturity at about 11 months, while males reached maturity some two months later. Marked sexual dimorphism was apparent, with females being larger. Females went through estrus at three-week intervals and could mate throughout the year. Although able to mate all year, they had an irregular breeding season when most mating took place.

Walruses live to about 20–30 years old in the wild. Comment The males reach sexual maturity as early as seven years, but do not typically mate until fully developed at around 15 years of age. They rut from January through April, decreasing their food intake dramatically. The females begin ovulating as soon as four to six years old.

Philophthalmus gralli reaches sexual maturity in a bird and produces eggs. Fully embryonated eggs are shed into the water from the definitive host's eyes. Miracidium is induced to hatch when ripe eggs are released from the worm into water. Upon contact with a snail, the miracidium perforates the host epidermis with the aid of secretions and the anterior cilia.

This subspecies reach sexual maturity at 2 years of age. Mating lasts from August to November and can involve mortal battles. The dominant male finally secures most of the mature females, typically 12 per male. After gestation, in May–July, females hide alone in the maquis (the dense vegetation) to deliver, typically a single birth per female.

They reach sexual maturity when 56–70 days old and breed through early April to August. The common hamster has a gestation of 15 days, gives birth to a litter of 1–12 and weans after three weeks of pregnancy. It communicates by squeaking or with ultra-sound. Both sexes flank mark by rubbing their glands against objects.

Like other neotragines, the royal antelope is monogamous, though polygamy has been occasionally observed. Individuals of both sexes have been known to reach sexual maturity by six months of age. Births have been reported in November and December. Typically a single, delicate offspring is born after an unknown gestational period, weighing – nearly a third of an adult's weight.

Mimic shiners are reported to only live a total of three years. This species, at least documented in TN, reach sexual maturity after their first year of growth. Spawning of this species varies depending on different locations due to differences in seasons and temperature changes. In Minnesota and Wisconsin this occurs from May to AugustBecker, G.C. 1983.

A sow is protective of her offspring and will attack if she thinks she or her cubs are threatened. Grizzly bears have one of the lowest reproductive rates of all terrestrial mammals in North America. This is due to numerous ecological factors. Grizzly bears do not reach sexual maturity until they are at least five years old.

From a series of captive rearing experiments, Sho Tanaka reported that hatchling sharks grew in length by up to per day. Males and females attain sexual maturity at the size of and respectively; the growth rate after maturity is very low. Known parasites of this species include the nematode Porrocaecum cephaloscyllii, and the leech Stibarobdella macrothela.

It is related to Nimbochromis livingstonii. In the wild it is known to grow to TL though usually not exceeding a length of TL. It is a popular freshwater aquarium fish. The fish are generally yellow with a pattern of darker, melanic blotches. Males will have a blue head and other blue colouring when they reach sexual maturity.

When seen from above, a sexually mature female hamster has a trim tail line; a male's tail line bulges on both sides. This might not be very visible in all species. Male hamsters typically have very large testes in relation to their body size. Before sexual maturity occurs, it is more difficult to determine a young hamster's sex.

Adverse environmental conditions may delay sexual maturity in some snail species. Most pulmonate air-breathing land snails perform courtship behaviors before mating. The courtship may last anywhere between two and twelve hours. In a number of different families of land snails and slugs, prior to mating one or more love darts are fired into the body of the partner.

They breed about once a year, with males reaching sexual maturity in five years, females in two. Despite infant mortality being fairly high, at roughly 57%, green monkeys are known to be heavily invested in their offspring, with mothers taking care of their young for about a year before letting them venture out as individual adults.

The end of the rapid growth phase suggests the onset of sexual maturity in Albertosaurus, although growth continued at a slower rate throughout the animals' lives. Sexual maturation while still actively growing appears to be a shared trait among small and large dinosaurs as well as in large mammals such as humans and elephants. This pattern of relatively early sexual maturation differs strikingly from the pattern in birds, which delay their sexual maturity until after they have finished growing. During growth, through thickening the tooth morphology changed so much that, had the association of young and adult skeletons on the Dry Island bonebed not proven they belonged to the same taxon, the teeth of juveniles would likely have been identified by statistical analysis as those of a different species.

The king colobus live in a unimale (polygynous) and multimale (polygynandrous) mating system. Some groups have shown year round births while others have shown births in relation to the dry seasons. The average gestation period is 175 days and the females produce 1 offspring every 20 months. Both males and females reach sexual maturity at approximately 730 days or 2 years.

In a vast ecosystem, nature will provide solutions. As sexual maturity, young males will be driven out by the dominant males, and eventually, they will find new pride for themselves. But this natural rule is not applicable to the small reserves, such as Dinokeng. Pressure from the dominant male lion has caused young males to try to escape from the reserve.

This results in successful hatch rates of up to 95%. Its eggs are 4 mm by 2.2 mm in size. Female round gobies reach sexual maturity in 1 to 2 years while males do so in 3 to 4 years. Gobies in the Laurentian Great Lakes typically mature up to 1 year earlier than in their native habitat in Europe.

During mating season (summer), the males develop a pair of nipple-like organs extending from their anal fins. Like all surfperches, they are viviparous (giving birth to live young). They reach sexual maturity after one or two years (at the length of ) and can live for up to nine years. They are carnivores, feeding primarily on small invertebrates during the day.

In the north Atlantic, sand tiger sharks are born about 1 m in length. During the first year, they grow about 27 cm to reach 1.3 m. After that, the growth rate decreases by about 2.5 cm each year until it stabilises at about 7 cm/y. Males reach sexual maturity at an age of five to seven years and approximately in length.

They are fully independent by the end of their first year and reach sexual maturity not long after. In some areas, sand cats give birth to two litters per year. Of 228 sand cats born in zoos globally by 2007, only 61% of the kittens lived to day 30. They died primarily due to maternal neglect by first-time mothers.

Most bog turtle eggs are laid in June. Pregnant females lay one to six eggs per clutch (mean of 3), and produce one clutch per year. A healthy female bog turtle can lay between 30 and 45 eggs in her lifetime, but many of the offspring do not survive to reach sexual maturity. Typically, older females lay more eggs than younger ones.

The two species can be readily distinguished (apart from the geographical separation in their ranges) by the extent of the whiteness on the body. Both have white bellies; however, the area of white coloration on the Southern species covers much more of the body — including the flanks, flippers, beak and forehead. Northern males are about long at sexual maturity. Females are .

The greater white-toothed shrew typically experiences one breeding season in its entire lifetime, whereby fertilization occurs right after parturition. C. russula breed mainly from March to September, producing about four litters which can contain anywhere from 2 to 10 young. The sexual maturity in this species is fairly quick. The litters remain in their parental territory till the next breeding season.

Two males fighting for dominance Mating occurs throughout the year, but peaks in the wet season. Females reach sexual maturity at about two years, and males at four to five years. A female can remain in estrus for three days, and the estrous cycle is 21–26 days long. As in all antelopes, mating occurs at a time of food abundance.

Unlike most bony fish, sharks are K-selected reproducers, meaning that they produce a small number of well-developed young as opposed to a large number of poorly developed young. Fecundity in sharks ranges from 2 to over 100 young per reproductive cycle. Sharks mature slowly relative to many other fish. For example, lemon sharks reach sexual maturity at around age 13–15.

FRDC Final Report, 1998/108. Canberra: Fisheries Research and Development Corporation. Aside from the distinctive Mediterranean population, Portuguese dogfish attain sexual maturity at similar sizes around the world: males and females mature at and respectively off the Iberian Peninsula, and respectively west of the British Isles, and respectively in Suruga Bay, Japan, and and respectively off southeastern Australia.Irvine, S.B. (2004).

Red-crowned amazon parrots reach sexual maturity at about five years old. It takes the female approximately 28 days to incubate her eggs, at an average of four eggs per clutch. Fledging begins at nine weeks old. In the wild, these parrots mate for life and find tree cavities near other members of their flock, creating a breeding group known as a colony.

Pup of ringed seal. Females reach sexual maturity at 4 years while males do not reach maturity until 7 years old. During the spring breeding season, females construct lairs within the thick ice and give birth in these structures. Females give birth to a single pup on ice floes or shorefast ice in March or April after a 9-month gestation period.

Females give birth once per year, with a gestation period around nine months. Females have a mean age at sexual maturity of 3.72 years and a mean age at first parturition of 4.64. Both courtship and mating occur under water. Pregnancy rate of females was 92% from age 3 to age 36, with lowered reproductive success after the age of 25 years.

Blackeye gobies are sexually dimorphic, with different sexes distinguishable from genital papilla, size, and length of dorsal and anal fins. Females attain sexual maturity at in length, while males mature at in length. The breeding season lasts for five to seven months, between April and October. During this, the fused pelvic fins (the disk) of the males turn very dark in color.

Torpedo mackayana is a small to medium-sized ray. Its growth and size was surveyed in the Coast of Senegal from 1994 to 1998, with the results having been published in 2001. This study showed that it has an average length of about and an average weight of at birth. Females typically reach sexual maturity at about and males reach it at .

This is a breeding strategy similar to that used by introduced species of trout. Macquarie perch appear to have inherited the sexual dimorphism of other Macquaria species where females reach a larger maximum size than males. Females also reach sexual maturity at older, larger sizes than males. Limited ageing work on Macquarie perch has recorded fish to 20 years of age.

The eggs are generally planktonic, and hatch fairly quickly (24 to 36 hours).Lake, 1967; Rowland, 1996 Like other Macquaria species, sexual dimorphism is present, with females reaching much larger maximum sizes than males. Females also reach sexual maturity at older ages and larger sizes than males. Very long migrations are part of the golden perch's ecology, particularly preceding spawning.

523–524 The developmental stages between each moult (ecdysis) until sexual maturity is reached is called an instar. Differences between instars can often be seen in altered body proportions, colors, patterns, changes in the number of body segments or head width. After moulting, i.e. shedding their exoskeleton, the juvenile arthropods continue in their life cycle until they either pupate or moult again.

The Splinter troop established a territory in the city, only to encounter the Galta Gang (ousted from the temple by the langurs) but saw them off. When Bipin, Yash and Tito reached sexual maturity, the splinter group exiled them. They became three bachelors roaming the city. They tried to join other gangs, but the alpha males of the groups did not want them.

They continue to molt throughout life, undergoing multiple instars after reaching sexual maturity, whereas all other insects undergo only a single instar when sexually mature. Apterygotes possess small appendages, referred to as "styli", on some of their abdominal segments, but play no part in locomotion. They also have long, paired abdominal cerci and a single median, tail-like caudal filament, or telson.

The juveniles are mimics of damselfish. The coney is a protogynous hermaphrodite, the females attain sexual maturity at a total length of and when they attain a total length of they begin to change sex to become males. In Bermuda, females have been reported to be mature at 4 years old. The males are territorial and guard harems of females.

This triggers sexual maturity in the fleas and they start producing eggs. As soon as the baby rabbits are born, the fleas make their way down to them and once on board they start feeding, mating, and laying eggs. After 12 days, the adult fleas make their way back to the mother. They complete this mini-migration every time she gives birth.

The storage chambers may be quite large and on average contain of food, but exceptionally can be up to . It hibernates between October and March. During this time, it wakes every five to seven days to feed from the storage chambers. The adults reach sexual maturity when they are about 43 days old and breed from early April to August.

In many organisms the juvenile has a different name from the adult (see List of animal names). Some organisms reach sexual maturity in a short metamorphosis, such as eclosion in many insects. For others, the transition from juvenile to fully mature is a more prolonged process—puberty in humans, for example. In such cases, juveniles during this transformation are sometimes called subadults.

Female White Cay Iguanas attain sexual maturity when they reach in length from snout to vent and weigh . Males appear to mature at a slightly larger size, at approximately seven years of age. Mating occurs in May and June, with clutches of 2-3 eggs usually laid in June or July, in nests excavated in pockets of earth exposed to the sun.

The blackish young measure about , and when first born are surrounded by egg membrane, from which they break free after about a day. Males reach sexual maturity at the age of two years, females at the age of three years. Individuals from viviparous and oviparous populations may be hybridised, but with significant embryonic malformation.Heulin, B., Arrayago, M. J., and Bea, A. 1989.

Infant mortality is high in this species. Upon reaching sexual maturity, males leave their natal group and transfer to neighboring social groups. Observations by researchers and reports from local people indicate that this species will jump to the ground and cross more than of grassland to reach nearby forest patches. This suggests that forest fragmentation may not completely isolate separated populations.

Like adults, baby mountain tapirs have thick, woolly fur to help keep them warm. Weaning begins at around three months of age. The immature coloration fades after about a year, but the mother continues to care for her young for around 18 months. Mountain tapirs reach sexual maturity at age three and have lived up to 27 years in captivity.

Male adults of Jasus frontalis reach a maximum length of (carapace length ), with females slightly smaller at long (carapace length ). Females reach sexual maturity after around seven years, when they have reached a carapace length of . Jasus frontalis differs from the other two species in its species group – Jasus tristani and Jasus paulensis – by the lack of sculpturation on the first abdominal somite.

For the first week of their lives, infant Baird's tapirs are hidden in secluded locations while their mothers forage for food and return periodically to nurse them. Later, the young follow their mothers on feeding expeditions. At three weeks of age, the young are able to swim. Weaning occurs after one year, and sexual maturity is usually reached six to 12 months later.

The northern redbelly dace reaches sexual maturity by its second or third summer and may live up to eight years. Spawning begins in the spring around May and continues into early August. Adult fish can spawn multiple times during the season. Nonadhesive eggs are laid in filamentous algae and hatch eight to ten days later at a water temperature of 21-27 °C.

They are long-lived, reaching around 16 years in the wild and up to 40 years in captivity, and are slow to mature, reaching sexual maturity at 3–4 years. Unlike many reptiles, this species is viviparous, with embryos developing in the mother's body, who then gives birth to live young. Between one and three young are born between January to March .

Having settled on a substrate, the larva examines the area until it finds another barnacle of the same species and then attaches itself to the substrate with its antennae, whereupon it metamorphoses into the adult. Sexual maturity is usually only reached after two years, and adults of S. balanoides may live for up to seven years, depending on their position on the shore.

Sommen charrs are among the fastest growing Arctic charrs in northern Europe. Albeit experiments show that at low temperatures () Arctic charrs from more northern lakes grow faster. Compared to the charr of Lake Vättern, only large individuals of Sommen charr breed; this may be the result of overfishing. In Sommen, charr reach sexual maturity at around seven years of age.

In the Asiatic part of its range, two distinct populations are found, a more northerly population which matures at less than 180mm mantle length, and a more southern population found south of latitude 45°N to 47°N, which reached sexual maturity at larger than 220mm mantle length. The two populations are found sympatrically in the waters off the Kuril Islands.

Experiments on mice have provided evidence that several stressors can act together to increase the risk of schizophrenia. In particular, the combination of a maternal infection during pregnancy followed by heightened stress at the onset of sexual maturity markedly increases the probability that a mouse develops symptoms of schizophrenia, whereas the occurrence of one of these factors without the other does not.

Adults that reach sexual maturity would then migrate en masse to shore areas in order to mate, lay eggs, and molt. Activities that would have made them more vulnerable to predators. This could also explain why the vast majority of fossils found in such sites are molts and not of actual animals. The same behavior can be seen in modern horseshoe crabs.

Female pacific seahorses in captivity have been observed producing small broods at three months of age. Sexually mature females often develop a dark patch below the anal fin. Males reach sexual maturity at around in height. Unsuccessful reproductive activity in captivity has been noted at around three months of age, with successful pregnancies as early as six months of age.

The natural history of the longnose pygmy shark is poorly known. It probably feeds on pelagic fishes and invertebrates, and is presumably aplacental viviparous with a small litter size like other members of its family. The long type specimen had an umbilical scar, suggesting that it was close to the birth size. Males and females attain sexual maturity at under long respectively.

An Atlantic white-sided dolphin off the coast of Cape Ann, Massachusetts The dolphin is slightly larger than most other oceanic dolphins. It is just over a meter in length at birth, growing to about (males) and (females) at maturity. It weighs once fully-grown. Females reach sexual maturity at between 6 and 12 years, and males between 7 and 11 years.

The more usual prey is other fish, lobsters and slipper lobsters. It is thought that these fish attain sexual maturity at six to seven years when they are around in total length. The adults form spawning aggregations numbering more than 40 in the period from April to June. In the southern Gulf of California these aggregations cover areas larger than .

It feeds on molluscs and small fishes. It is a protogynous hermaphrodite, the transition from female to male happens when they are nine years oold and have attained a total length of . The females reach sexual maturity at a total length of about around four and five years of age. Spawning aggregations have been recorded off Israel, Senegal, Turkey and Corsica.

Sexual maturity for both the male and female dunnart is reached by one year of age. The age at which dunnarts are no longer able to reproduce is undetermined. Cases have been recorded of male dunnarts in captivity that continued to breed at five years of age, and female dunnarts in captivity that continued to breed at three years of age.

Ovulation is induced by sexual stimulation. Sexual maturity age for small breeds like the Miniature Lion Lop is 4 to 5 months. Males usually require more time to mature, and normally reach adult sperm counts between 6–7 months. Due to the territorial nature of female rabbits, it is standard practice for the doe to always be brought to the buck's cage.

Immediately after birth, the young start flickering their tongues. The tongue and mouth are dark blue and the ventral surface is black in juveniles, changing to pink and mauve respectively after about three months. The young are independent from straight after birth without any parental care and start feeding on slugs and snails. Age at sexual maturity is about 22 months.

Some evolutionary psychological theories concerning drug use suggest individuals consume drugs to increase reproductive opportunities. Drug use can increase reproductive fitness because drug use can (1) advertise biological quality, sexual maturity, or availability, (2) decrease inhibitions in mating contexts, and/or (3) enhance associative learning behaviors that in turn increase mating opportunities. See Richardson et al., 2017 for a review.

Females typically give birth to a single offspring, although twins rarely occur. This differs from the sympatric pygmy slow loris, which commonly has twins. The mother carries her young about three months before they become independent, although they may be temporarily left on branches while the mother searches for food. Sexual maturity is reached at approximately 20 months of age.

Females lay around 120 eggs onto the brood patch located on the underside of the males' tail. The eggs are fertilised and carried by the male for around a month before the hatchlings emerge. The young are independent at birth, beginning to eat shortly after. Common seadragons take about 28 months to reach sexual maturity, and may live for up to six years.

Full growth and sexual maturity are attained at the age of two years. Cooperative breeding and pseudopregnancy have been observed in Ethiopian wolves. Most females disperse from their natal pack at about two years of age, and some become "floaters" that may successfully immigrate into existing packs. Breeding pairs are most often unrelated to each other, suggesting that female-biased dispersal reduces inbreeding.

Rat snakes reach sexual maturity in their fourth year. The snakes start to breed in May and June, earlier in the South. Males approach females to initiate breeding and may combat other males before breeding. About five weeks after mating, the female lays 5 to 27 eggs in hollow standing and fallen trees, compost and mulch heaps, sawdust piles, and decomposing logs.

They emerge from the egg capsules as shell-cap-bearing trocophores. These trocophore larvae do not spend much time in the plankton, because settlement occurs relatively soon, after 3.5 to 4.5 days. Individuals usually reach sexual maturity at shell lengths of 32–34 mm. The life span of this species is still unknown, but estimates for other top shells reach 30 years.

The larva can also swim actively and attach to the skin of the host and migrate to the gills. The larva reaches sexual maturity about ten days later.Animal Parasites Their Life Cycles and Ecology Summer is the season of peak infestation, and by fall the worms are scarce. Eggs released late in the season enter diapause, a period of inactivity.

They then emerge as adult mosquitoes ready to mate. Wyeomyia smithii females will produce a clutch of fertilized eggs generally within two days of sexual maturity. Some populations in the southern United States have also been known to drink blood after producing their first clutch to help produce a second clutch; there are no reports of northern populations displaying this behavior, however.

It prefers large carcasses, such as those of deer or cattle. It reaches sexual maturity at five or six years of age and nests at elevations of up to , generally on inaccessible rock ledges. One or two eggs are usually laid. It is one of the world's longest-living birds, with a lifespan of over 70 years in some cases.

Weaning begins after six weeks, but the young start to follow their mothers early and can do so for up to a year. Sexual maturity is reached after 6–12 months, when females weigh about and males . Pacas usually mate in water. As the male approaches the female, she starts to hop enthusiastically, more so if he sprays her with urine.

Allozyme, chromosomal and morphological variability in the Litoria lesueuri species group (Anura : Hylidae), including a description of a new species. Australian Journal of Zoology Hyperolius ocellatus is an ontogenetic frog with dramatic differences in both color and pattern between the sexes. At sexual maturity, the males display a bright green with white dorsolateral lines.Bell, R. C., & Zamudio, K. R. (2012).

Female feeding chick. Great spotted woodpeckers are strongly territorial, typically occupying areas of about year-round, which are defended mainly by the male, a behaviour which attracts females. Pairs are monogamous during the breeding period, but often change partners before the next season. Sexual maturity is attained at an age of one year; courtship behaviour commences in the following December.

Like other pulmonates, snails and slugs, the Quimper snail is hermaphrodite. Sexual maturity is reached at about two years of age. Mating takes place at mid-season and laying, usually underground, is deposited in tiny natural tunnels of the soil. There are two annual breeding periods in Brittany, with hatching occurring in the spring (April-May) and in the fall (September-October).

Specific life history requirements of C. monodonta’s life cycle are still widely unknown. The mussel is estimated to reach sexual maturity at 4- to 5-years-old for males and 5- to 7-years-old for females. The life cycle of C. monodonta consists of many steps. Males release sperm into the water, and females intake the sperm while filter feeding.

Sexual dimorphism in the Neotropical lizard, Tropidurus torquatus (Squamata, Tropiduridae). Amphibia-Reptilia. The development of color dimorphism in lizards is induced by hormonal changes at the onset of sexual maturity, as seen in Psamodromus algirus, Sceloporus gadoviae, and S. undulates erythrocheilus. Male painted dragon lizards, Ctenophorus pictus. are brightly conspicuous in their breeding coloration, but male colour declines with aging.

The yellow-edged lyretail is normally observed in clear-water areas at depths greater than but less than , showing a preference for islands and offshore reefs over continental shores. It feeds mostly on fishes, as well as on crabs, shrimps and stomatopods. The females attain sexual maturity at a standard length of . They have been recorded forming spawning aggregations off Aceh in Sumatra.

A vervet monkey grooms another in Gaborone, Botswana Juvenile C. p. rufoviridis, Uganda When males reach sexual maturity, they move to a neighboring group. Often, males will move with a brother or peer, presumably for protection against aggression by males and females of the resident group. Groups that had previously transferred males show significantly less aggression upon the arrival of another male.

Adults require several years to reach sexual maturity; reproductive rates are low; the young emerge live from the parent; and dispersal is very limited, with most individuals remaining in the tree or bush on which they were born. All of these traits make these snails very sensitive to any event that could lead to a reduction or loss of reproductive individuals.

Female Baikal seals reach sexual maturity at 3–6 years of age, whereas males achieve it around 4–7 years. The males and females are not strongly sexually dimorphic. Baikal seals mate in the water towards the end of the pupping season. With a combination of delayed implantation and a nine-month gestation period, the Baikal seals' overall pregnancy is around 11 months.

They also eat crustaceans such as shrimp, crabs, amphipods, stomatopods, and the larvae of decapods. They are a short-lived, fast-growing species; a 5-year-old fish would be considered old. They reach sexual maturity at the age of 2 years, and spawn in the open sea during the summer. Blackfin tuna are a warmer-water fish, preferring water temperatures over .

Social monogamy in some species may have evolved to combat this behavior. Promiscuity may also lessen the risk of infanticide since paternity becomes uncertain. Primates have a longer juvenile period between weaning and sexual maturity than other mammals of similar size. Some primates such as galagos and new world monkeys use tree-holes for nesting, and park juveniles in leafy patches while foraging.

They reach sexual maturity later and have a longer period between births. Populations therefore recover more slowly after being depleted by poaching or the pet trade. Data for some African cities show that half of all protein consumed in urban areas comes from the bushmeat trade. Endangered primates such as guenons and the drill are hunted at levels that far exceed sustainable levels.

The false killer whale reaches physical maturity between 8 and 14 years, and maximum age in captivity is 57 years for males and 62 for females. Sexual maturity happens between 8 and 11 years. In one population, calving occurred at 7 year intervals; calving can occur year-round, though it usually occurs in late winter. Gestation takes around 15 months.

Since the late 19th century, several fossils of exceptionally well-preserved skeletons of Cretoxyrhina have been discovered in Kansas. Studies have successfully calculated its life history using vertebrae from some of the skeletons. Cretoxyrhina grew rapidly during early ages and reached sexual maturity at around four to five years of age. Its lifespan has been calculated to extend to nearly forty years.

"Estudio preliminar de la variación de Tarebia granifera (Lamarck), Río Hatibonico, Camagüey". Revista Cubana de Medicina Tropical 44: 66–70. and they resulted that sexual maturity is reached at an age of about five months. Reported variation in maturation period varies from 97–143 days (3.2–4.8 months) under the laboratory conditions to 6–12 months, also from laboratory data.

Even when they move independently, they cannot always cross gaps in the canopy that adults can manage. To help them, an adult will stretch across the gap, forming a bridge over which the young can cross. Females become sexually mature at about four years, and males at about five years. Upon reaching sexual maturity, females leave their natal group, but males do not.

Growth of white marlin is very rapid, with males reaching sexual maturity at only 153.2 cm LJFL and females becoming sexually mature at 189.9 cm LJFL. The lifespan of white marlin has been identified as 15 or more years. White marlin are ram ventilators, which means they have to be constantly moving to breathe. Many have made long transatlantic journeys.

Estuaries are also subject to large-scale construction activities like damming, dredging, filling, and draining, resulting in direct and immediate habitat loss. Another reason the longheaded eagle ray is a concern to conservationist in their low fecundity. Similar to other Myliobatid rays, longheaded eagle rays produce small litters, ranging from 1-4 pups, which typically reach sexual maturity at 4–6 years old.

Another body size mutation was found in the experimental Cornell K-strain of chickens. Body size was reduced by about 30% and the affected birds were recognizable by 6 to 8 weeks of age. Their sexual maturity was somewhat delayed and rate of lay was about 90% that of the K-strain. Viability of the carriers was good but hatchability was poor.

The egg is about across, and hatches into a larva that superficially resembles a trilobite. Indeed, it is often referred to as the 'trilobite larva'. Through a series of successive moults, the larva develops additional gills, increases the length of its caudal spine, and gradually assumes the adult form. Modern xiphosurans reach sexual maturity after about three years of growth.

Between 30 and 45 days after copulation, the female lays two to five eggs, which she hides under dead leaves, moss, and pieces of bark on the forest floor. Sometimes, a true nest is excavated and the clutch is laid on to the ground. The eggs hatch after 59 to 70 days; the brown leaf chameleon reaching sexual maturity within one year.

The larvae spend the following three months in the water column and once they become competent, they dwell at the sea surface until they settle on rocky intertidal and shallow subtidal habitats down to 30 m. The normal size at which the snail reaches sexual maturity is between 5.4 and 6.7 cm; it takes about four years to reach this size.

Mother bear with cubs Kodiak bears reach sexual maturity at age five, but most sows are over nine years old when they successfully wean their first litter. The average time between litters is four years. Sows continue to produce cubs throughout their lives, but their productivity diminishes after they are 20 years old. Mating season for Kodiak bears is during May and June.

In Northern and Eastern Europe, spiders reach sexual maturity only in June, while in Southern Europe, they become sexually mature in April. Nursery web spiders have a one-year annual cycle in southern Europe. They grow in summer, hibernate in winter, reach adulthood in spring, and reproduce and then die in autumn. Their offspring are sexually mature in the following spring.

Denticetopsis species range from 1.8-6.7 centimetres (.71-2.6 in) SL. Sexual dimorphism in the shape of the dorsal, pectoral, and anal fins has not been described in species of Denticetopsis, despite the presence of these traits in Cetopsis and Cetopsidium. It is possible that male D. praecox reach sexual maturity at a smaller size than females of the same species.

Coimbatore Forests, Tamil Nadu A cow elephant with suckling young at the Chester Zoo Bulls will fight one another to get access to oestrous females. Strong fights over access to females are extremely rare. Bulls reach sexual maturity around the age of 12–15. Between the age of 10 and 20 years, bulls undergo an annual phenomenon known as "musth".

Other defense responses include inflating its body and excretion of a bitter, milky fluid from warty glands located on its back. Maximum longevity of the frog is six to 10 years. The diet of adult Mississippi gopher frogs probably includes frogs, toads, insects, spiders, and earthworms. Males reach sexual maturity at four to six months and females at two to three years.

Hedgehogs tend to be solitary, though not to the extent of hamsters. Some captive bred females crave the companionship of another hedgehog and occasionally show bonding tendencies when housed with another female; male hedgehogs should not be housed together as they will fight once they reach sexual maturity. Hedgehogs were considered insectivores prior to that classification's abandonment. Presently, hedgehogs are classified as omnivorous.

They are initially active during the day in open water, then around 35–50 mm they adopt adult habits and become nocturnal and spending much of their time hidden. They grow quickly in their first year, typically reaching 75-80mm but growth slows after this. Sexual maturity is reached in their first year and females spawn once per year, producing 500–10,000 eggs.

They reach sexual maturity at the age of two years. They have been reported to live for up to twenty two years on fur farms, and up to eighteen years in the wild. Sables can interbreed with pine martens. This has been observed in the wild, where the two species overlap in the Ural Mountains, and is sometimes deliberately encouraged on fur farms.

Growth is rapid; snakes may reach in total length at 1 year and at 2 years. The largest reported specimen was in total length. Sexual maturity may be attained at a minimal total length of and an age of at least 3 years. The species is oviparous, with a gestation period around 21 days, followed by 60 days of incubation.

Even when they are maintained under continuous darkness, the fish are much more responsive to changes in light (i.e. higher contextual plasticity) during subjective day than during subjective night. Another example involves the changes in an individual's behavior and hormonal profile around the time of sexual maturity; such changes are affected changes in physiology that occurred months to years earlier in life.

In the early 1900s, longnose gar were considered as destructive predators. Soon after this characterization, gar population reduction methods were established. Their declining populations are due to overfishing, habitat loss, dams, road construction, pollution, and other human-caused destruction of the aquatic systems. Because of their long lifespans and older sexual maturity age, factors affecting their reproduction is an issue in preserving them.

Active during the night, Transandinomys talamancae lives on the ground and eats plants and insects. Males move more and have larger home ranges than most females. It breeds throughout the year, although few individuals survive for more than a year. After a gestation period of about 28 days, two to five young are born, which reach sexual maturity within two months.

The pups leave the nest a day or so after weaning, when the female begins to prepare for a new litter. The female may raise three to four litters in a year. Young born early in the year may reach sexual maturity in as little as four weeks, but those born in the fall do not do so until spring.

The foal weans for 6 to 8-month after birth, reaching sexual maturity 2 years after birth. Lifespan is up to 40 years in captivity. Wild asses can run swiftly, almost as fast as a horse. However, unlike most hoofed mammals, their tendency is to not flee right away from a potentially dangerous situation, but to investigate first before deciding what to do.

About four more days are required to produce sexual female and male forms. From egg to sexual maturity, it takes the pharaoh ant about 38 to 45 days, depending on temperature and relative humidity. They breed continuously throughout the year in heated buildings and mating occurs in the nest. Mature colonies contain several queens, winged males, workers, eggs, larvae, pre-pupae and pupae.

The Red Sea goby can be found on sandy substrates in inshore, shallow waters where it feeds on harpacticoid copepods and nematodes, as well as oligochaetes, gastropods and other meiofauna. This species conceals itself by burying itself into the sand up to the level of its eyes. They probably live no longer than 2 years. They reach sexual maturity at a year old.

Hāpuku are a large, slow growing, long-lived species. They reach sexual maturity between 10 and 13 years and have lifespans up to 60 years. They can grow as large as 100 kg, but are usually found around the 25 kg mark. They have an average size of 80–100 cm but can grow up to 180 cm in length.

Females reach sexual maturity at a median carapace length of . They produce between 1700 and 14,800 eggs, with diameters of . The eggs are incubated on the female's pleopods for 3–4 months before hatching; this occurs from April to October, with rates peaking in July. The larvae pass through seven flattened phyllosoma stages over 4–6 months, growing from around to around .

Bearded guan (Penelope barbata) are a monogamous, territorial species that mate at the beginning of the rain season (March–July). Most species of Guan reach sexual maturity at two years and can reproduce until they reach the age of twenty. A pair of guan will produce a clutch of three eggs which the female will incubate for 24–28 days.

They reach sexual maturity at a year old. They are known to spawn in the least saline part of the Gulf of Taganrog during June and July. Immediately following spawning the adults migrate to the open sea. The eggs are released over mud bottom and hatch in 2 days, after which the larvae lie on bottom, moving to the surface after 4 days.

The POP burden carried by male and female marine mammals tends to increase with time until they reach the age of sexual maturity. After that point, the burden in males continues to grow, as they continue to absorb POPs from their food. However, with female marine mammals, the POP burden carried decreases after birth but can then increase until the next reproductive cycle.

Gadella maraldi is a benthopelagic fish which can be found on the upper continental slope, over hard substrates at depths ranging from 150–700 m, to 368–748m in the east Ionian Sea. Spawning most likely takes place in the Spring and it has pelagic larvae. Its diet is not known. It attains sexual maturity at a length of 15 cm.

In some species, offspring may become independent around the next spring, through some may stay until the female successfully mates again. Bears reach sexual maturity shortly after they disperse; at around 3–6 years depending on the species. Male Alaskan brown bears and polar bears may continue to grow until they are 11 years old. Lifespan may also vary between species.

The tail is medium in length at about 25 cm, and has a black tuft at the end that is similar to a lion's tail, although this tuft is more pronounced in males than in females. Gestation is approximately six months. The young are nursed for one year. Sexual maturity is reached at four years for females, and six years for males.

They grow and develop rapidly in comparison with other small cat species. One individual was reported to be scaling a 40-cm wall within 16 days of birth, reflecting a high degree of physical agility from an early age. Females reach sexual maturity at 11 months of age, and males at around 18 months. In captivity, they live up to 12 years.

A horse may be gelded at any age; however, if an owner intends to geld a particular foal, it is now considered best to geld the horse prior to becoming a yearling, and definitely before he reaches sexual maturity. While it was once recommended to wait until a young horse was well over a year old, even two, this was a holdover from the days when castration was performed without anesthesia and was thus far more stressful on the animal. Modern veterinary techniques can now accomplish castration with relatively little stress and minimal discomfort, so long as appropriate analgesics are employed.R Eager (2002) "Evaluation of pain and discomfort associated with equine castration" UFAW Publications A few horse owners delay gelding a horse on the grounds that the testosterone gained from being allowed to reach sexual maturity will make him larger.

Females of the same species are generally smaller, and reach a maximum post puberty carapace length of 20mm. The largest pre-puberty length a female can reach is about 14 mm, while the average length after puberty is 14.4mm. As macropodia mature sexually, several interesting physiological changes occur. In males sexual maturity is indicated by the swelling and color change of their sperm ducts.

Cuban iguanas reach sexual maturity at an age of two to three years. Males are gregarious when immature, but become more aggressive as they age, vigorously defending territories in competition for females. Females are more tolerant of each other, except after laying their eggs. Mating occurs in May and June, and females lay single clutches of three to 30 eggs in June or July.

The Japanese sleeper ray is viviparous, with the developing embryos nourished initially by yolk and later by histotroph ("uterine milk") produced by the mother. Females bear litters of up to five pups in early summer; the newborns measure long and are lighter and more uniform in color than the adults. Sexual maturity is reached at a length between for males, and at around for females.

The larger the bird is grown the fewer chickens are put in each house, to give the bigger bird more space per square foot. Because broilers are relatively young and have not reached sexual maturity, they exhibit very little aggressive conduct. Chicken feed consists primarily of corn and soybean meal with the addition of essential vitamins and minerals. No hormones or steroids are allowed in raising chickens.

The southern giant petrel is more likely to form loose colonies than the northern, both species laying a single egg in a rough nest built about off the ground. The egg is incubated for about 60 days; once hatched the chick is brooded for 3 weeks. Chicks fledge after about 4 months, but do not achieve sexual maturity for another 6–7 years after fledging.

They will go through 3 coats in their first year until their final one, which resembles adult Alaska marmots. They will hibernate and live with their parents at least one year, they will be fully-grown after two years and reach sexual maturity from 2 to 3 years. Marmots life span are not known but it is believed to be about 13–15 years.

Juveniles reach sexual maturity within one year, and the lifespan of these chipmunks is around 64 months. Females have higher survivorship and live longer than males. There is a 1:1 ratio of males to females when the juveniles disperse in spring. By the end of the year, this ratio favors females due to the higher risk of mortality in the wider ranging males.

It is a predatory fish, taking a variety of crustaceans, polychaetes and bivalves as prey. It reaches sexual maturity at three years of age, and spawns multiple times between December and April. The southern school whiting is commonly caught by commercial and recreational fishermen, often while fishing for related species, especially the sought after King George whiting. The species is marketed fresh in southern Australia.

It lays usually less than 10 uncalcified egss, but sometimes more (according to the table values). Juveniles are hatching from eggs in less than two weeks (according to the table values). They reach sexual maturity in one year and longevity of this species is 1–2 years. Xerocrassa geyeri feeds on dead plants, but rarely also on living plants, epilithic lichens and on algae.

Fight between two greater kudus, Chobe National Park, Botswana. Greater kudus reach sexual maturity between 1 and 3 years of age. The mating season occurs at the end of the rainy season, which can fluctuate slightly according to the region and climate. Before mating, there is a courtship ritual which consists of the male standing in front of the female and often engaging in a neck wrestle.

Birthing peaks at the end of the dry season and in the midst of the wet season. Gestation averages 133 days, usually resulting in a single infant; twins are a rarity. There is only one litter per year. Sexual maturity is reached at 2.5 to 3.5 years of age, at which point the offspring disperse; that is, they leave the troop in search of an unattached mate.

The age of sexual maturity varies, but is usually reached at 3 to 5 years. Gestation lasts around 13 months. One or occasionally two calves are produced, and the female can give birth to a new calf every other year. Young Bactrian camels are precocial, being able to stand and run shortly after birth, and are fairly large at an average birth weight of .

Chick in nest burrow Little penguin (Eudyptula minor) family exiting burrow at night, Bruny Island Little penguins reach sexual maturity at different ages. The female matures at two years old and the male at three years old. Between June and August, males return to shore to renovate or dig new burrows and display to attract a mate for the season. Males compete for partners with their displays.

Two red hartebeest juveniles in a grassland Mating in hartebeest takes place throughout the year, with one or two peaks that can be influenced by the availability of food. Both males and females reach sexual maturity at one to two years of age. Reproduction varies by the subspecies and local factors. Mating takes place in the territories defended by a single male, mostly in open areas.

Oregon Department of Fish & Wildlife . Mating occurs when males (who usually achieve sexual maturity earlier in the season) pass spermatophores to the females. The female squid store them in the oral surface of their buccal membrane until they too become sexually mature later in the season and begin to spawn. Spawning is continuous and not seasonal, occurring virtually throughout the year in intermittent spawning events.

Breeding occurs in spring in the south, but throughout the year in Queensland in the north. Sexual maturity for the glider is around two years of age when the glider will then pair up with another glider, usually in a monogamous relationship and mate August to December. The offspring are normally born between May and September. They then stay in the marsupium for about 100 days.

Offspring eventually settle at the bottom of the ocean in waters with a usual minimum depth of 300 ft. Golden king crabs are typically classified as juveniles in their first few years. After reaching sexual maturity around 4 to 5 years of age, they are classified as adults. Golden king crabs molt throughout their entire lives, and juveniles do so more frequently than adults.

Praunus flexuosus has two generations per year. A population overwinters, and produces a spring generation that appears in May or June, before dying off in the summer. Some of the spring generation reach sexual maturity and reproduce in the autumn, producing the generation which will reproduce the following spring. Females release eggs into a brood pouch or marsupium, where they are held until they hatch.

The patas monkey lives in multi- female groups of up to 60 individuals (although much larger aggregations have been reported). The group contains just one adult male for most of the year. During the breeding season, there are multi-male influxes into the group. Once juvenile males reach sexual maturity (around the age of four years) they leave the group, usually joining all-male groups.

As a member of the AZA, the Caldwell Zoo participates in many breeding projects. Animals born at the zoo include reticulated giraffes, flamingoes, black rhinoceros, jaguars, giant anteaters, and many others. The zoo also participated in the first cheetah born through artificial insemination. African penguins are now being bred as well and will probably have young as soon as the currently owned penguins reach sexual maturity.

Males attain sexual maturity after a year and females after two years, when the water levels rise in the winter rains in August and September they migrate upstream to headwaters and tributaries to breed. Each female can lay 230 to 1138 eggs. This is a carnivorous species which feeds on a variety benthic invertebrates, especially ostracods and fly larvae. They have a lifespan of 6 years.

Mature females bear a marsupium, or brood pouch, which holds her eggs while they are fertilised, and until the young are ready to hatch. As a female ages, she produces more eggs in each brood. Mortality is around 25–50% for the eggs. There are no larval stages; the eggs hatch directly into a juvenile form, and sexual maturity is generally reached after 6 moults.

The bobak marmot (Marmota bobak), also known as the steppe marmot, is a species of marmot that inhabits the steppes of Eastern Europe and Central Asia. It is a social animal and inhabits steppe grassland, including cultivated field borders. It hibernates for more than half the year. Litter sizes average about five offspring and it takes three years for the young marmots to reach sexual maturity.

As active hunters that stalk or ambush aquatic prey, D. triton spiders do not use their webs for prey capture. Nevertheless, silk plays an important role in adaptation to aquatic environments. Silk is used to construct trailing safety lines (known as draglines) used in movement across bodies of water, for example. As spiders reach sexual maturity, males and females use web construction in different ways.

Normally active during the day, they are less active during hot weather or during the dry season. A very long-lived animal, the leopard tortoise reaches sexual maturity between the ages of 12 and 15 years. During the mating season, males will fight over females, ramming and butting their competitors. They will trail after females for quite some distance, often ramming them into submission.

Females will molt approximately 7 times, with their terminal molts being in mid to late summer. Males will molt only 6 times and will have a terminal molt mid to late summer also. Nymphs and juveniles spend all spring and early summer catching as much prey as possible and growing. Adults reach sexual maturity in late summer and will mate as soon as they are sexually mature.

Males reach sexual maturity in three to four years. Females do not reach maturity until about 14 years old. Sperm may be stored in females due to sperm being present in males throughout the year and mating only occurring in autumn. Courtship sequence is similar to other species of aquatic emydines, except males use their snouts as the "titillation tools" rather than extended fore claws.

The breeding season of the white-sided jackrabbit is a minimum of 18 weeks, occurring from mid-April to mid-August. The average number of young per litter is around two. The young tend to have a soft, woolly coat in early life and attain sexual maturity at a rapid rate. Breeding in L. callotis does not begin within the first calendar year following its birth.

L. canarium males reach sexual maturity at a shorter shell length when compared to females. Individuals are considered to be adults by the time the outer lip of their shells is noticeably thickened and flared; growth to adult size takes about a year. The maximum lifespan of the dog conch differs between sexes; it is estimated at 2.0 and 2.5 years for females and males, respectively.

Female brown bullheads will continue to guard their offspring for a while following their hatching. Both parents generally care for their offspring for an additional five days after the eggs hatch. Adults, both male and female, will reach sexual maturity around age three, and can produce between 10 and 10,000 offspring in their lifetime. Brown bullheads have occasionally been recorded eating their own eggs.

The young typically reach sexual maturity in about three days. In the laboratory, Lepidodermella squamatum has lived for up to forty days, producing four or five eggs during the first ten days of life. Gastrotrichs demonstrate eutely, each species having an invariant genetically fixed number of cells as adults. Cell division ceases at the end of embryonic development and further growth is solely due to cell enlargement.

At the end of the post-larval stage, juveniles resemble an adult mackerel in all but size. Schooling behavior occurs around this time. Sexual maturity is reached at around 2 years of age, though some fish may reproduce a season earlier or a season later. Though some fish are sexually mature at in length, even by only about half of females will be ready to reproduce.

T. c. bauri hatchling The Florida box turtle reaches sexual maturity around 12–13 years of age. While some species are only able to produce one clutch in a breeding season, the Florida box turtle has been observed laying as many as four separate clutches in a single year. The egg laying season occurs in the Spring and generally lasts from April to very early June.

Ewes generally reach sexual maturity at six to eight months of age, and rams generally at four to six (ram lambs have occasionally been known to impregnate their mothers at two months). Sheep are seasonally polyoestrus animals. Ewes enter into oestrus cycles about every 17 days, which last for approximately 30 hours. In addition to emitting a scent, they indicate readiness through physical displays towards rams.

Japanese sea bass specimen in May 2018. The Japanese sea bass occurs on inshore rocky reefs where there is a current. The juveniles have been recorded ascending rivers and then return as adults to sea to spawn. It is a protandrous hermaphrodite in which the fish reach sexual maturity as males at around 2 years old and change into females when they are older.

Pupfish, such as the Shoshone pupfish, exhibit many adaptions for life in extreme thermal and osmotic environments. Pupfish growth is rapid and sexual maturity is reached within four to six weeks. This short generation time enables pupfish to maintain small but viable populations. Among the subspecies, however, there are minor differences in generation times, with pupfish in habitats with widely fluctuating environmental conditions exhibiting the shortest.

Male juvenile Mungos mungo may reduce helping behaviors until sexual maturity is reached. Similarly, if there is a lack of food due to environmental conditions, such as reduced rainfall, the degree of helper input may be reduced greatly within juveniles. Adults may maintain their full activity because they are sexually mature. Additionally, the costs of being a helper can be more detrimental to one sex.

Overall, the addition of helpers to a breeding pair encourages multiple reproductions per year, and increases the rate of successful reproduction. Male breeders can benefit directly from reproducing with subordinate females and aiding in raising the young. This allows the male to obtain a “repayment investment” within these subordinate offspring. These offspring have a higher chance to become helpers once sexual maturity is reached.

The lifespan of toque macaques in the wild is about the same as in captivity, up to 35 years. The expected lifespan in the wild is low due to high infant mortality rates. There is also significant mortality among adolescent males when they venture off to join a different troop. Once toque macaques have reached sexual maturity they will likely live to an old age.

In the Grand Canyon tributaries, mating can extend even later into the year through April, May, and July. This species will not mate unless the water depth is strictly lower than 1 m, probably because the shallow water is easily heated to their desired temperature by the sun. Juveniles grow exponentially fast, reaching lengths of 60 mm and sexual maturity within the first year.

Weaning occurs during late May and early June, when yearlings may break away from the burrow. Pups leave their mothers by fall. As they grow older, young play fighting games that involve biting, hissing, and tackling. They reach sexual maturity after one year, with a lifespan of 3–5 years; adults weigh about and are 14-17 inches long, and males are larger than females.

Due to this lack of temperature protection, parents are required to keep their chicks warm for the first few weeks. The naked chicks are fed by their parents for about 3 weeks with the male partner providing most of the food. After about 3 weeks of being fed by their parents, the chicks start to fledge. By age 4, the offspring have reached sexual maturity.

The offspring will be nursed for an average of 4.5 months, but weaning can sometimes take up to 8 months. The females reach sexual maturity at about 9 months, while the male reaches maturity by about 18-20 months. The pygmy slow loris is seasonally fertile during the months of July and October. Chemical signals play a role in the reproductive behavior of female pygmy slow lorises.

Rough-toothed dolphins give birth to a single young, after an unknown period of gestation; it is also unknown whether or not they have a distinct breeding season. The young are about long at birth, and grow rapidly for the first five years of life. Females reach sexual maturity somewhere between six and ten years of age, and males between five and ten years.

Depending on their upbringing, cultural differences, and prior sexual knowledge, boys may have different reactions to spermarche, ranging from fear to excitement. Spermarche is one of the first events in the life of a male leading to sexual maturity. It occurs at the time when the secondary sex characteristics are just beginning to develop. The age when spermarche occurs is not easy to determine.

The 4th stage larvae appear in 47 hours after oral infection. The 5th stage immature worms appear 6 days after infection. They reach sexual maturity on and after 2 weeks after infection. Unlike the hookworms Necator americanus and Ancylostoma duodenale, A. ceylanicum can competently infect and thrive within not only human hosts but other mammalian hosts as well (such as dogs, cats, or golden hamsters).

Redtail surfperch (Amphistichus rhodoterus) are viviparous, a species that gives birth to live young. Amphistichus rhodoterus are iteroparous (i.e. reproducing multiple times during their life) with females giving birth annually after reaching sexual maturity at 3 or 4 years of age. Females along the central Oregon coast contain fertilized eggs near the first of the year, gestate for 8 months, and give birth in August and September.

Sexual maturity of P. corroboree is reached at four years of age, with one year as an embryo/tadpole and two years as a juvenile/subadult. Adults primarily have only one breeding season. Breeding occurs around December terrestrially near shallow pools, fens, seepages, wet grassland or wet heaths, where the males build chamber nests within the grasses and moss. Males compete for females via song.

Gravid female, thumb Panther chameleons reach sexual maturity at a minimum age of seven months. When gravid, or carrying eggs, females turn dark brown or black with orange striping to signify to males they have no intention of mating. The exact coloration and pattern of gravid females varies depending on the color phase of the chameleon. This provides a way to distinguish between locales.

In the autumn, female pea aphids lay fertilized eggs overwinter that hatch the following spring. The nymphs that hatch from these eggs are all females, which undergo four moults before reaching sexual maturity. They will then begin to reproduce by viviparous parthenogenesis, like most aphids. Each adult female gives birth to four to 12 female nymphs per day, around a hundred in her lifetime.

When they are born, young Arctic shrews are helpless. Their mother cares for them until the end of the weaning period, 20 to 24 days after birth. Both female and male Arctic shrews reach sexual maturity after one year. As much as 50 percent of all juveniles die in the first month, but the average lifespan of an Arctic shrew in the wild is around 18 months.

Capsules from late summer overwinter because embryonic development ceases in temperatures below 10 °C, thus these capsules hatch in spring after 7–8 months. The shell grows mainly from May to August; there is no shell growth in winter. The snails reach sexual maturity in less than 1 year, when the shell length is 5.5–5.7 mm. The life span of T. fluviatilis is 2–3 years.

Tree weta are hemimetabolous insects, meaning they hatch from eggs as small versions of adults. Eggs are laid in the soil and hatch after about 8 months without parental care. Over about 12 months nymphs grow and molt nine times before reaching full size (8-12 grams) and sexual maturity. Hemideina trewick are smaller than the sympatric H. thoracica and reach maturity earlier in the summer.

Males start booming at about 5 years of age. It was thought that females reached sexual maturity at 9 years of age, but four five-year-old females have now been recorded reproducing. The kakapo does not breed every year and has one of the lowest rates of reproduction among birds. Breeding occurs only in years when trees mast (fruit heavily), providing a plentiful food supply.

Gestation is about three weeks, and the female has a litter of three or four young. Nests in the wild, built from shredded bark, are in a tunnel or under a log. Marsh shrews typically live about 18 months, and males are not thought to reach sexual maturity during their first summer. Since their lifespan is short, they apparently breed for only one season.

Binky's new enclosure opened in May 1977. That year, Binky made an appearance as "my dog Spot" in one of Cal Worthington's car dealership commercials. As Binky approached sexual maturity, zoo officials negotiated for the purchase of a female polar bear named Mimi from the Tulsa Zoo in Oklahoma. As the transfer was being finalized, however, Mimi died from a viral disease in Tulsa.

Black tetras of the leucistic aquarium variant The black skirt tetra is a common fish that is widely available for purchase. Hobbyists often provide live foods such as daphnia and mosquito larvae, and frozen foods like bloodworms. In a home aquarium The species reaches sexual maturity at about two years of age. Like most characins, this species spawns by intermittently releasing and fertilizing eggs among plants.

The three spot cichlid feeds mainly on small fishes and invertebrates, including both aquatic and terrestrial insects. A large female may lay over 1,000 eggs and reach sexual maturity at a length of , while for males this is attained at . The pair usually select a flat stone and spawn on that, both parents guard the eggs fiercely and will also tend the fry after they have hatched.

Eggs develop quickly, hatching in a mere 24 to 36 hours. The tadpole reaches a maximum length of . It is grayish olive or grape-green dorsally and purplish ventrally. The tail has 6 or 7 black saddle marks. The tadpole completes metamorphosis into a juvenile toadlet in 4 to 6 weeks, and it reaches adulthood and sexual maturity at 1.5 to 2.3 years of age.

These corals do not contain zooxanthellae in their tissues and thus do not need to live in sunlit places. A. fiordensis has a 50:50 sex ratio, with no obvious differences between the sexes. Colonies do not reach sexual maturity until they are about 0.7–1.0 m tall, aged at least 30 years. Female colonies produce between 1.3 million and nearly 17 million oocytes each year.

Knockout mice lacking the enzyme required to add the sulphated GalNAc capping structure show longer half-lives for lutropin, which results in increased receptor activation and oestrogen production. Female knockout mice reach sexual maturity faster than their wild-type counterparts, have a longer oestrus cycle and produce more litters. Thus, the sulphated GalNAc tag is very important in regulating serum concentrations of certain glycoprotein hormones.

Very little is known about the life history of beaked whales. The oldest recorded age is 84 years for a male Baird's beaked whale and 54 years for a female. For all other beaked whale species studied, the oldest recorded age is between 27 and 39 years. Sexual maturity is reached between seven and 15 years of age in Baird's beaked whales and northern bottlenose whales.

Like other starfish, Archaster typicus is a broadcast spawner, the male and female starfish each liberate their gametes into the sea where fertilisation takes place. However, in contrast to most other starfish, Archaster typicus performs pseudocopulation. Specimens reach sexual maturity at a radius of 29 mm. About two months ahead of spawning the starfish begin to congregate, with males in particular becoming more mobile.

The Araucanian herring, Clupea bentincki, is a fish species in the family Clupeidae. It is an epipelagic fish, silvery below and dark blue above, which schools in coastal waters off the west coast of South America. There it filter feeds on smaller plankton such as diatoms. It reaches sexual maturity when it is about 10 centimetres long, and is a pelagic spawner, spawning between June and November.

Siberian sturgeon usually weigh about 65 kg, with considerable variability between and within river basins. The maximum recorded weight was 210 kg. As with all other acipenserids, the Siberian sturgeon are long-lived (up to 60 years), and late to reach sexual maturity (males at 11–24 years, females at 20–28 years). They spawn in strong current main stem river channels over stone or gravel substrates.

E. cinereum generally spawns from late January to April, with peak breeding periods occurring in April. Ova produced annually by females are estimated to range from 50-250. Sexual maturity in individuals upon reaching lengths of 50 mm or more, occurs in the first full spawning season for this species. Females are reported to deposit eggs on water willow stems and on the edges of boulders.

New hatched stickleback can wander from the nest, but the male gathers them into his mouth to deposit them back in the protective nest. Spawning usually ends around mid-July due to swift temperature changes in the water. The newly fertilized eggs are vulnerable to slight temperature changes. These fish grow rapidly during their first summer and typically reach sexual maturity by spring of the next year.

Once young bulls reach sexual maturity, they separate from the family group and form loose bachelor groups for a few days, but usually stay alone. Adult bulls associate with family groups only during the mating season. Family groups travel about per day and move in a home range of up to . Their seasonal movement is related to the availability of ripe fruits in Primary Rainforests.

Males usually reach sexual maturity at about 3–3.5 years old, while females reach it at about two years old. Females approaching estrous can be easily identified because of the swelling and bright red coloration of the genital area. This signals to males that the given female is ready for mating. Moreover, just prior to mating, males will use their fingers to probe the female's birth canal.

Mouflon rams have a strict dominance hierarchy. Before mating season or "rut", which is from late autumn to early winter, rams try to create a dominance hierarchy to determine access to ewes (female mouflon) for mating. Mouflon rams fight one another to obtain dominance and win an opportunity to mate with females. Mouflons reach sexual maturity at the age of 2 to 4 years.

Species account: Black- footed ferret—Mustela nigripes, In: Endangered Species Program. Pierre, SD: U.S. Fish and Wildlife Service, Mountain-Prairie Region, South Dakota Ecological Services Field Office They are then separated into individual prairie dog burrows around their mother's burrow. Kits reach adult weight and become independent several months following birth, from late August to October. Sexual maturity occurs at one year of age.

Short snouted seahorses are considered ovoviviparous meaning that the female deposits eggs into a pouch on the males stomach, called a brood pouch, and the male goes through pregnancy and labour. Sexual maturation occurs during the first reproductive season after birth. The length of the reproductive season can vary based on temperature, light, and water turbulence. Sexual maturity in males is recognized by a brood pouch.

It should not be confused with ?Bothriospondylus madagascariensis, a distinct taxon now named Vouivria, or another distinct primitive sauropod from the Isalo III Formation also tenatively called "Bothriospondylus" madagascarensis. Age determination studies performed using growth ring counts suggest that this sauropod took 31–45 years to reach sexual maturity and was relatively fast-growing given the presence of a large amount of fibrolamellar bone.

The costs of beak trimming relate primarily to welfare concerns. These include acute stress, and acute, possibly chronic, pain following trimming. A bird's ability to consume food is impaired following beak trimming because of the new beak shape and pain. Most studies report reduced body weights and feed intake following beak trimming; however, by sexual maturity or peak egg production, growth rates are usually normal.

66 Beak coloration helps to make displays using those beaks more obvious.Rogers and Kaplan (2000), p. 155. Birds are capable of seeing colors in the ultraviolet range, and some species are known to have ultraviolet peaks of reflectance (indicating the presence of ultraviolet color) on their beaks. The presence and intensity of these peaks may indicate a bird's fitness, sexual maturity or pair bond status.

In V. storri sexual maturity is attained by the time it is long in snout-to- vent length (SVL). Enlarged testes chiefly occur in November, the late dry and early wet season, but do occur throughout the year. Similarly, breeding takes place throughout the year as well. Up to 6 eggs are laid, which are incubated at 27–29°C (81–84°F) for 100–129 days.

Kittens weigh at birth. This is relatively large for a small cat, and is probably related to the long gestation period. The kittens open their eyes at around two weeks of age, and begin to take solid food at seven to eight weeks. Margays reach sexual maturity at twelve to eighteen months of age, and have been reported to live more than 20 years in captivity.

Upon ingestion of Pumiliotoxin 251D, organisms preying on O. pumilio experience convulsions, paralysis, and death. It has been found that once O.pumilio reaches sexual maturity, their granular glands significantly increase in size and their diet shifts. In females, it is common to find about 53% more alkaloids than adult males. Oribatida mites belonging to the glandulate suborder Brachypylina are an important origin of pumiliotoxins in O. pumilio.

The spectacled caiman reaches sexual maturity from four to seven years old, at a length of for females and for males. Usually, the more dominant individuals mature more quickly. Specimens choose mates and engage in copulation from May to August, the wet season. The females build nests as a mound of dense vegetation, in areas that are close to water but not at risk of being flooded.

A calf of the South American tapir. T. terrestris mates in April, May, or June, reaching sexual maturity in the third year of life. Females go through a gestation period of 13 months (390–395 days) and will typically have one offspring every two years. A newborn South American tapir weighs about 15 pounds (6.8 kilos) and will be weaned in about six months.

It is thought that female Aldabra giant tortoises are able to lay more than one clutch of eggs a year. The hatchlings emerge after an incubation period of 8 months. The hatchling Aldabra giant tortoises tend to all emerge during the same two week period, coinciding with the arrival of the rainy season. They reach sexual maturity at around the age of 30 years.

For example, before puberty, human children have flat chests, but adult females have generally larger breasts than adult males. However, there are exceptions such as obesity and hormone imbalances such as gynecomastia. After sexual maturity is achieved, it is possible for some organisms to become infertile, or even to change their sex. Some organisms are hermaphrodites and may or may not be able to produce viable offspring.

Here the Male:Female sex ratios have been reported as 1:0.55, indicating males are nearly twice as common than females. The black jack reaches sexual maturity at 34.6 cm in females and 38.2 cm in males. The timing of spawning is poorly known, with occurrences recorded in February, April, May and July to September. The reproductive behaviour and early life history of the species is entirely unknown.

Bonnethead sharks are the only sharks known to exhibit sexual dimorphism in the morphology of the head. Adult females have a broadly rounded head, whereas males possess a distinct bulge along the anterior margin of the cephalofoil. This bulge is formed by the elongation of the rostral cartilages of the males at the onset of sexual maturity and corresponds temporally with the elongation of the clasper cartilages.

Field guide to mammals. 1996. After birth, the quadruplets remain in the burrow, living off the mother’s milk for about three months. They then begin to forage with the mother, eventually leaving after six months to a year. Nine-banded armadillos reach sexual maturity at the age of one year, and reproduce every year for the rest of their 12–to-15 year lifespans.

Dead specimens have been recovered that had apparently choked trying to swallow too-large prey. The coffin ray is aplacental viviparous, in which the developing embryos are nourished by yolk, later supplemented by histotroph ("uterine milk") secreted by the mother. Females give birth to litters of 4–8 pups in summer; the newborns measure approximately long. Males and females both attain sexual maturity around long.

The eggs will then be fertilized by the male, which will guard the nest until the eggs have hatched. This fish is believed to have a maximum lifespan of around four years in the wild and reaches sexual maturity after one year, meaning a single female could only produce a total of about 350-400 eggs during her lifetime.Global species. Etheostoma rufilineatum. 2012. www.globalspecies.

The red-faced spider monkey feeds on a variety of foods and would be considered an omnivore. It will eat termites and grubs, but also feeds on supple leaves, flowers, berries and fruit. It has a gestation period of 226–232 days, is weaned after four or five years when it reaches sexual maturity, and has a life span of up to 33 years in captivity.

Territorial, individuals of opposite sexes form pairs and occupy territories, nearly large and marked by preorbital gland secretions. The blue duiker feeds on fallen fruits, foliage, flowers and pieces of bark, provided mainly by the forest canopies in their habitat. The age when sexual maturity is gained has been given differently by different studies. The species is monogamous, with pairs remaining together throughout the year.

This is typically 7 days after hatching, and the animal is typically around long. There are a further two mysis stages before the first post-larval stage, at a length of around . In this stage, the pleopods (swimmerets; abdominal appendages) become functional, and the animal closely resembles the adult form. Females live for 14–15 months, and reach sexual maturity at a carapace length of .

Cubs are dependent on their mother's milk for 30 weeks and will reach independence at 16–18 months. At the age of six weeks, they attain , by the age of eight weeks they reach and by the age of six months they weigh . They reach sexual maturity at the age of three years and attain their full growth at the age of five years.

Three-month-old pups begin to accompany their mother while she forages. Males and females both engage in parental care, but it is primarily done by the females. Data on male parental care has been collected from captive animals and little is known whether this occurs frequently the wild. Maned wolves reach sexual maturity at 1 year of age, when they leave their birth territory.

Body size and growth rates are more important than age when determining sexual maturity in bearded dragons. Males will become very aggressive towards each other and will assert their dominance by inflating their beards and through fast head bobbing. Breeding typically occurs in the early spring. Females will lay a clutch of 11–30 oblong-shaped eggs in a shallow nest dug in the sand.

Eye-rings are believed to convey various types of signals between individual birds. Some eye-rings appear only at sexual maturity, while others suggest the individual's age or health status. Individual birds may be included or excluded from reproductive capability due to signals conveyed by the eye-ring. Red carotenoid-based colors of the orbital rings of pheasants are known to be related to health.

Frizzled Pekins are common. Pekin Bantams are very docile, and with careful and regular handling they make ideal pets, especially for families with younger children. However, the Pekin bantam cocks can still be aggressive and defensive of their territory and mates once they reach sexual maturity, but are generally gentle natured. The hens are regularly broody and are known to be good sitters and attentive mothers.

Little is known about mating and reproduction of the giant golden-crowned flying fox. The litter size is one individual, with females likely producing no more than one litter per year. It has also been speculated that females may only give birth every other year. Based on limited observation, it is thought that females may not reach sexual maturity until two years of age.

The life expectancy of Saguinus midas is approximately 10 years in the wild and 16 years in captivity. These tamarins live in cooperative groups of 4 to 15 members with little competition within group even between breeding males. Adults can reach sexual maturity at age of 16-20 months. Only one female in the group will breed during breeding season with the other females suppressing the instinct.

A male tuatara named Henry, living at the Southland Museum and Art Gallery, is still reproductively active at 111 years of age. Tuatara reproduce very slowly, taking 10 to 20 years to reach sexual maturity. Mating occurs in midsummer; females mate and lay eggs once every four years. During courtship, a male makes his skin darker, raises his crests, and parades toward the female.

Breeding occurs in late spring and early summer.. The young are born in spring, summer, or winter, depending on the geographic locality, after a gestation period of ten to eleven months. Newborn finless porpoises are reported to in length. Males reach sexual maturity at four to six years of age, and females at six to nine years. Finless porpoises have lived up to 33 years.

Zacetecan deer mice breed during the wetter parts of the year, from June to December. The female can produce up to three litters in a season with an average of three pups each. Females can reach sexual maturity within six months, so that some born in the early part of the breeding season may produce young of their own before the end of the year.

The long-haired rat is able to breed at any time of the year as long as food resources are available. The litter sizes vary from 5-10 however during a plague epidemic they are capable of reproducing at a rate of 12 young every three weeks. The gestation period ranges from 22–24 days and young rats generally reach sexual maturity at 70 days old.

Bunny rats can reach population densities of in ideal conditions. They are common prey for owls, and are thought to have a maximum lifespan of 15 months. They breed between September and March, but most commonly in the spring, and give birth to litters of up to eight pups. Females reach sexual maturity two months after birth, although this may be longer for males.

Females reach sexual maturity at a carapace length of , while males reach it at . Eggs are laid in April, and the eggs hatch into planktonic larvae, which eventually settle as juveniles at depths greater than . As they grow, these crabs migrate upwards, with the adults only found at depths of less than . Due to the shallow slopes in the north-eastern Atlantic, these migrations involve distances of .

These eggs will hatch around July and August, which are the typically rainy seasons in these countries. On the other hand, snakes in Brazil exhibit continuous reproduction. The eggs are laid anywhere from November to January and start to hatch around March throughout August. Both male and female blunthead tree snake reach sexual maturity about 2 years after hatching or at around 620mm SVL (Snout-Vent Length).

S. chrysotaenia reaches sexual maturity at a total length of 195mm for females and 197.1mm for males, usually at 2 years old. An analysis of the parasites of Sphyraena chrysotenia in the Mediterranean showed that the fish, after its invasion of this Sea, lost at least two parasite species, co-introduced three parasite species and acquired six native parasite species from its native congener Sphyraena sphyraena.

The plastron can have a dark or light (tan to yellow) background which can be uniform or patterned with fine lines radiating from the center of each plastral scute. Their feet are partially webbed and well developed for either aquatic or terrestrial mobility. They can grow to about in length. Cyclemys species achieve sexual maturity after seven to 12 years, earlier for males and later for females.

Males reach sexual maturity between seven and 12 years of age, females between eight and 17 years of age. Spawning almost always occurs in the natal river, generally over a hard bottom just downstream of a spring on the river bottom feeding groundwater into the river. After spawning, the adults and older juveniles collect in regions of cooler, deeper, slower-flowing water, generally downstream of springs.

The female stays with the young for a few weeks, after which time the hatchlings disperse. The young grow at a rate around per year and reach sexual maturity around 8 years old. Cuvier's dwarf caiman is considered to be a keystone species whose presence in the ecosystem maintains a healthy balance of organisms. In its absence, fish, such as piranhas, might dominate the environment.

Skull Females are dominant. The female reaches her sexual maturity at 10 months and is receptive to the male twice a year. This species mates while hanging upside down from branches; individuals in captivity will not breed if no suitable branch is available. The gestation period is 166–169 days after which the female will bear 1–2 young which feed from her for 6–7 months.

Immediately after hatching, turtles are dependent on egg yolk material for sustenance. About a week to a week and a half after emerging from their eggs (or the following spring if emergence is delayed), hatchlings begin feeding to support growth. The young turtles grow rapidly at first, sometimes doubling their size in the first year. Growth slows sharply at sexual maturity and may stop completely.

Likely owing to differences of habitat and food by water body, growth rates often differ from population to population in the same area. Among the subspecies, the western painted turtles are the quickest growers. Females grow faster than males overall, and must be larger to mature sexually. In most populations males reach sexual maturity at 2–4 years old, and females at 6–10.

With their hooked hands, they can move swiftly with great momentum, swinging from the branches. Although they rarely come to the ground naturally, while there, they walk bipedally with arms raised above their heads for balance. Their social organization is dominated by monogamous family pairs, with one breeding male and one female along with their offspring. When a juvenile reaches sexual maturity, it is expelled from the family unit.

The excessive number of recreational divers could cause considerable inadvertent damage. Poaching by diving also had visible negative effects. There was a dramatic decrease in commercially valued species such as venus clams (Venus verrucose), which used to be numerous, through this kind of poaching. There was even greater damage to commercially sought-after species with a long growth period and late sexual maturity and their survival was threatened.

Pubic hair is a collection of coarse hair found in the pubic region. It will often also grow on the thighs and abdomen. Zoologist Desmond Morris disputes theories that it developed to signal sexual maturity or protect the skin from chafing during copulation, and prefers the explanation that pubic hair acts as a scent trap. Also, both sexes having thick pubic hairs act as a partial cushion during intercourse.

Ursine colobus are diurnal and highly arboreal, coming down from trees only occasionally when feeding. Their social behavior is like that of many polygynous monkeys, with each group consisting of related females their juvenile offspring and a territorial male. The males are highly territorial and disperse upon reaching sexual maturity. Ursine colobus use a roaring call to advertise territory and location, this roar is a low "rur, rur, rur" noise.

Sexual maturity is achieved when there is a decrease in overall ossicle (endoskeleton) thickness with a simultaneous radial increase to at least 110mm. A. scabra can undergo both sexual and asexual (fissiparous) processes of reproduction. Environmental influences induce gametogenesis and gamete maturation, with water temperature a major factor. Offspring disperse through the means of larval transport or epiplanktontic drift (drift occurring between the surface and 100m in depth).

The flowering period of the orchid is from November to January. It produces seeds annually but also reproduces vegetatively through the production of daughter root-tubers on lateral underground stolons. Its leaves die off in autumn, with new leaves emerging in spring. Although the life expectancy and age of sexual maturity of the orchid are unknown, it is likely that some clonal colonies have existed for several decades.

The egg capsule is rectangular, measuring long and across; a deep notch is on each side and short, flattened horns occur at the four corners. The capsule usually contains multiple embryos, up to five; the big skate is the only other skate species known to regularly place more than one embryo into a capsule. Newly emerged skates measure . Males reach sexual maturity at across, and females at across.

Galápagos petrel flying overland. Pterodroma species reach sexual maturity at age 5-6 and generally nest once every year from then on. The breeding season occurs at a different time for different Galápagos petrel populations. In Santa Cruz and Santiago, the season starts from March to January; in Isabela, from the end of April to January; in Floreana, from October to August; and in San Cristobal, from May to October.

Sexual maturity comes at the age of one year, although some species may be physiologically mature by 57 days. However, some behavior may need to be learned before the birds can breed successfully. Once done with the brood the male, if still within the breeding season, will seek out another female and initiate the cycle again. Studies have shown that 54–62% of breeding female spotted nothura are first-year birds.

Gestation takes about six months, and tarsiers give birth to single offspring. Young tarsiers are born furred, and with open eyes, and are able to climb within a day of birth. They reach sexual maturity by the end of their second year. Sociality and mating system varies, with tarsiers from Sulawesi living in small family groups, while Philippine and western tarsiers are reported to sleep and forage alone.

Little is known about the reproductive behavior of melon-headed whales. The most information comes from analyses of large stranding groups in Japanese waters, where sexual maturity for females is reached at 7 years of age. Females give birth to a single calf every 3 – 4 years after a gestation of approximately 12 months. Off Japan, the calving season appears to be long (from April to October) without an obvious peak.

Spawning season for mud darters lasts from early March to early or mid May, with females reaching sexual maturity at one year. During spawning season, males do not establish territories, but are more aggressive toward other males. During courtship, the male swims around a female with his dorsal fin erect, sometimes resting his head on her nape. The spawning site is selected by the female, while the male follows behind.

If cankers continue to form and expand, the fungus can girdle the stem, severing the flow of nutrients and water to the vital vegetative tissues. The absence of nutrient dispersal will result in tree death, however, the root system will survive. As a result, American chestnuts exist mainly as shrubs sprouting from the old, surviving roots. However, these sprouts usually succumb to infection by C. parasitica before reaching sexual maturity.

The hardnose shark is viviparous; like in other requiem sharks, once the embryos exhaust their yolk supply, the empty yolk sac develops into a placental connection through which the mother provides nutrition. Females give birth once every other year to one or two pups, following a gestation period of twelve months. Newborns measure long, and sexual maturity is attained at long. The maximum lifespan is at least 15–20 years.

The new, soft shell is then vigorously inflated with water and it hardens at this inflated size. The animal then has plenty of room to grow inside the new shell simply by displacing the water. This strategy also has the benefit of allowing the animal to regenerate limbs that have been lost since its last molt. Unlike many crabs, the sheep crab ceases to molt when it attains sexual maturity.

Bony fishes are probably the main food of the Borneo shark. It is viviparous like other requiem sharks, with the developing embryos provisioned by the mother through a placental connection formed from the depleted yolk sac. The litter size is six, and the pups are born at close to long. From the available specimens, the length at sexual maturity can be surmised to be under in males and under in females.

The species inhabits both shallow inshore environments and waters to depths of 55 m. The species is a benthic predator, taking a variety of crustaceans, molluscs and echinoderms, and shows a change in diet with age and habitat. S. vittata is a multiple spawner, reproducing between December and February once it has reached one or two years of age. Juveniles inhabit protected inshore waters, moving offshore once they reach sexual maturity.

It is believed that the large egg size compensates for the extremely small clutch size. The large egg size allows for the larvae to be very large and well developed upon hatching. The average size of a one-year-old is , and the average size of a 2-year-old is . They reach sexual maturity by their second summer and have a maximum lifespan of 2.5–3 years.

Native geckos (and skinks) reach sexual maturity and start to reproduce around three years of age, with variations according to species and condition. The main determining factor in the ability to mate appears to be size. There have been cases of geckos in captivity that have mated and produced viable progeny at two years of age, although their first birth is often one hatchling rather than the norm of two.

Males also develop small bumps upon reaching sexual maturity. L. fabricii can be distinguished from other snailfishes by its dark peritoneum and by the number of soft rays on its anal fin. Although the dark peritoneum is unique among Arctic snailfish, L. fabricii as presently defined is a complex that comprises several species that all have it (some of these have scientific names that can be resurrected, but others remain undescribed).

The young undergo their larval stage within the egg so that they resemble small adults when they hatch in late August or September. The juveniles reach sexual maturity in 3 to 4 years and live for approximately 20 years. The young may remain in the same area as the adults until they become mature at which time they move away and establish their own territories. Territories are about in area.

Male sea lions reach sexual maturity from ages 5 to 7 and don't become territorial until around 9 to 13 years of age. The females arrive in late May bringing in an increase of territorial defense through fighting and boundary displays. After a week births consist most usually of one pup with a perinatal period of 3 to 13 days. Steller sea lions have exhibited multiple competitive strategies for reproductive success.

They more typically range from . The size of the bat gray is depend on many factors, such as habitat alterations, different oceanographic and environmental conditions. The sexual maturity size of the female Myliobatis california is often greater than the male one.Hernandez- Herrera, A., Galvan-Magana, F., Patricia Ceballos-Vazquez, B., Pelamatti, T., García-Rodríguez, A., Hernández-Herrera, A., Galván-Magaña, F., Ceballos- Vázquez, B., & Tovar-Ávila, J. (2020).

This trust is what enables the warring and uncertain lovers to achieve their sexual maturity. In 1988, Allen Dunn argued that the play is an exploration of the characters' fears and desires, and that its structure is based on a series of sexual clashes. In 1991, Barbara Freedman argued that the play justifies the ideological formation of absolute monarchy, and makes visible for examination the maintenance process of hegemonic order.