Effects of Canola Meal Use Instead of Soybean Meal in Mirror Carp (Cyprinus carpio, L. 1758) Diet on Growth and Body Composition

In this study, the effects on growth, feed conversion ratio, body composition, survival rate and hepatosomatic indices of addition canola meal in different ratio (12%, 22%, 32% and 42%) instead of soybean meal to diet of carp fry (average weight 0.25 +/- 0.01 g) (Cyprinus carpio, L. 1758) were investigated. The diets of carp fry were formulated as isonitrogenous (35%) and isocaloric (3200 kcal kg(-1)), and the fry were fed 60 days. In the results of this study, the best final body weight, weight gain and specific growth rate were found in control group, this group exhibited similar growth with groups containing 12% and 22% canola meal. No significant differences in body composition, hepatosomatic indices and survival rate were obtained with use of canola meal in carp diet (P>0.05). In conclusion, it was determined that combination of 14.30% soybean meal and up to 22% canola meal could be used in mirror carp fry diets.