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Fish Anatomy - Gills
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a. general features of a spiny-rayed fish
b. adipose fin showing its location on caudal peduncle when present
c, canine teeth on jawbone (dentary) of a yellow pikeperch (Stizostedion)
d. method of counting the number of principle dorsal fin rays in soft-rayed forms such as minnows, suckers, salmonids, and allied forms
e. shows the gill or branchiostegal membranes free (left) and united (right) to the isthmus on the underside of the head
f. comparison of the dentition in the roof of the mouth of a charr (Salvelinus) with a trout (Salmo).
(Note that in Salmo the teeth extend down the shaft of the vomer while in Salvelinus they are restricted to the crest or head of this bone.)
g. position of the gill rakers and gill filaments on a single gill arch
h. main difference between cycloid and ctenoid scales. Fish with ctenoid scales such as bass, sunfish or perch feel rough in the hand while fish with cycloid scales such as trout or minnows feel slippery and are difficult to hold. The ctenii acount for the difference.
We have an individual project to do for Aquaculture Practicum for the term, and my proposed project includes:
HOW A FISH WORKS
1. Dissection of one fish purchased at local seafood market, and labeling each part according to chart/s.
2. Attempt at recreating model of the dissected fish and organs in clay, with identical labeling.
3. Research and identify function of each organ / part of fish anatomy in writing.
Additional requirement by instructor: Keep a record of all observable details.