Chemical analysis (moisture, protein, lipid and ash content) at the end of a feeding trial is frequently used to determine the influence of feed on fish composition. According to Hepher (1990), endogenous factors (size, sex, and stage of life cycle) and exogenous factors (diet composition, feeding frequency, and temperature) affect the body composition of fish. It should be noted that within exogenous factors, the composition of the feed is the only factor, which could have influenced the difference chemical composition of the fish, as other endogenous factors were maintained uniform during the study.