How to use ammocoete in a sentence? Find typical usage patterns (collocations)/phrases/context for "ammocoete" and check conjugation/comparative form for "ammocoete". Mastering all the usages of "ammocoete" from sentence examples published by news publications.
As with all lamprey species, the least brook lamprey spends the majority of its life as a worm-like ammocoete. The ammocoete (5 mm-20 cm) is clear with a pigmented head when small (<5 cm), but becomes a dark/golden brown as it matures. Ammocoetes have pigmented eye spots located in the head that can detect light and dark. After metamorphosis from the ammocoete into the juvenile stage, the lamprey becomes a golden color with yellow-tinged fins.
|
|
In 1915 he obtained his doctorate degree (DSc) in anatomy from the New York University. His thesis was on the tissue development, differentiation, and morphology of the lamprey Ammocoete. From 1918, he was professor of anatomy at the University of Colorado Medical School.
|
|
Hardisty and Potter, 1971a,b. The sedentary and phytophagous larval period of all lampreys is spent in the sandy silt substratum of cool streams.Moore and Mallatt, 1980. Coloration of live mountain brook lamprey did not change between the ammocoete and senescent periods and ranged from butterscotch to olive brown.
|
|
Spawning pairs stimulate other pairs to begin spawning. The mountain brook lamprey lives up to five or six years, and usually dies after spawning. The post-embryonic life cycle of all lampreys includes a distinct larval or ammocoete and adult period. A juvenile period prior to the adult period is present in parasitic lampreys, but is absent in the nonparasitic or brook lampreys.
|
|
The freshwater ammocoete or larval stage of the life cycle are a dull brown in colour for most of their lives. Ammocoetes remain in fresh water for about four years until undergoing a six-month metamorphosis, changing to silver with blue-green stripes. The central nervous system of the pouched lamprey develops notably during metamorphosis to the large-eyed macropthalmia stage, with particularly large increases in the volume of visual areas of the brain. At this point they migrate downstream to the sea.
|
|
No results under this filter, show 5 sentences.