Lysine effect on the characterization of fillet, by-products, residues, and morphometry of tambaqui Colossoma macropomum (Cuvier, 1818)

This study aimed to evaluate the yields of by-products and residues morphometry juvenile tambaqui Colossoma macropomum undernutrition with different levels lysine. Diets were elaborated containing 6.60, 9.72, 12.84, 15.96, 19.08, 22.20 g kg -1 total lysine, these fed fish distributed in 18 tanks (310 L each one) for 90 days. Morphometric analysis, measurements whole fish, by-products, taken compared other. All variables validated using ANOVA, Tukey's test, quadratic regression analysis ( P < 0.05). No differences found morphometric > The ratio between data standard length showed significance at 9.72 15.96 = 0.03). gutted fillets, protein lipid contents weights lengths intestines did not change Moisture was modified lysine 0.00), minerals, 6.60 0.01). increase diet led an fin weight 0.00). It concluded that addition directly influence phase, but it affect waste skin by-product.