Efeitos da inclusão de hidrolisados proteicos de suínos e aves na dieta de alevinos de tilápia (Oreochromis niloticus)

Abstract

The present study sought to evaluate the usage of traditional protein sources and by-products from the pork and poultry production chain as raw materials in the manufacture of diets for tilapia post-larvae (Oreochromis niloticus). The test ingredients were: fish flour, poultry gut flour, swine liver hydrolyzed protein and feather hydrolyzed protein, having 5 different isoproteic and isoenergetic dietetic compositions. The zootechnical performance, liver and muscle histology were verified, biochemical profile of alanine-aminotransferase and aspartate-aminotransferase enzymes, and cell stress markers catalase and malondialdehyde. Diets formulated with hydrolyzed sources showed greater hepatic hyperactivity of aminotransferases that act on protein synthesis, being a strong indication of the nutritional benefits of hydrolyzed sources manifested under fish growth. Considering the use of protein hydrolysates, a diet with PHF + PHMS is recommended, in order to provide a better survival rate.