Abstract:
The juvenile and adult of C. atherinoides is mainly a carnivorous fish. Its
food consists mainly of crustaceans, insects, rotifers, protozoans, algae, debris and
detritus. The juvenile and adult C. atherinoides are surface feeders. Monthly
variations in the percentage composition of the food items in the different stages of
the fish were recorded. The fish changed its food and feeding habit seasonally. The
feeding intensity was very poor in mature fishes during the spawning period. The
immature fishes fed actively throughout the year. The ratio of the total length and
alimentary canal length of the juvenile and adult stages of the fish is I :0.56 and
1: O. 61 and it has a shortened alimentary tract. The relationships between the total
length and alimentary canal length of the juvenile and adult showed strong linear
relationship.
The ovaries of C. atherinoides were classified into ten stages. Immature
stage, maturing-I ( early developing), maturing-II (late developing), mature, ripe,
pre-spawning, spawning, post spawning, spent and resting stage.----
Description:
This Thesis is Submitted to the Department of Zoology , University of Rajshahi, Rajshahi, Bangladesh for The Degree of Doctor of Philosophy (PhD)
