Effects of intensive culture and feeding isoprotein diets with different fat and carbohydrate contents on cortisol, total protein and protein fractions contents, aspat and alat activities, and on body composition and weight increments in carp (Cyprinus carpio L.) fingerlings

Abstract

The experiment was run on carp individuals in their sec ond year of life. The fish were randomly divided into two groups fed two different isoprotein diets, one with increased fat level (Group I) and the other with increased carbohydrate level (Group II). Cortisol, total protein and protein fraction contents, AspA T and AlAT activities, and body composition and weight increments were monitored. Statistically signifi cant differences between the two experimental groups were found in cortisol content, albumin level, blood AspAT and AlA T activities as well as in d ry weight, total protein, and fat contents of the fish body.