THE EFFECT OF USING DIFFERENT RATIOS OF FISH BY-PRODUCTS (INTERNAL ORGANS) ADDED TO THE STOMACH POWDER ON SOME FEED EVALUATION CRITERIA AND PROTEIN FOR COMMON CARP (CYPRINUS CARPIO L.)

This study was conducted in the fish hatchery of Al-Suwayrah/ Department of Animal Resources/ Wasit/ Al-Suwayrah district, Iraq. 200 common carp fish with an initial average weight of 52 ± 0.00 grams per fish were fed on four experimental diets with two replicates each. The results showed that treatment T2 outperformed, followed by treatments T3 and T4, compared to the control treatment. The reason for the superiority of the second treatment may be attributed to the presence of a (33%) ratio of fish by-product powder, indicating the potential for replacing animal protein powder with fish by-product powder, along with 25% of stomach powder. This enhanced the nutritional value of the treatment, and the fish accepted the feed, which may be well-balanced in essential amino acids content. Based on the above-mentioned results, it is now possible to use stomach powder and fish by-products (internal organs) at a ratio of 33% as a partial substitute for animal protein in the diets of common carp fish in Iraq.