Comportamento alimentar, desempenho e bioquímica sanguínea de Colossoma macropomum em diferentes esquemas de alimentação

Abstract

This work aimed to evaluate different feeding frequencies and self-feeding on the behavior, performance and blood biochemistry parameters of juvenile Colossoma macropomum, during two feeding periods (day/night). One hundred and sixty-two juveniles of C. macropomum (3.63 ± 0.05 g) were subjected to nine treatments: 24-hour self-feeding (SF); day self-feeding at will (SFD) and feeding at fixed frequencies of two (2D), four (4D) and six (6D) times a day; night self-feeding at will (SFN) and feeding at fixed frequencies of two (2N), four (4N) and six (6N) times a night. SF exhibited 95.7% nocturnal and 4.3% diurnal activity (p <0.05). SFD and SFN showed feeding activity throughout the day and night, respectively. Final weight, weight gain and total feed consumption were higher for animals in 2D, 4D, 6D, 2N, 4N and 6N (p <0.05). Apparent feed conversion was better for animals in SF, SFD, 4D, SFN and 4N (p <0.05). Cholesterol and HDL values were lower for fish maintained on SF, SFN, 2N, 4N and 6N feeding schemes (p <0.05). The animals in the SF had the lowest triglyceride values among the feeding schemes (p <0.05) while glucose, albumin, LDL, ALT and AST did not differ significantly among the treatments. It is concluded that juveniles of C. macropomum has ample food plasticity. The results showed that juvenile C. macropomum fed four times a day, have good performance. Blood metabolic indicators were influenced by the dietary patterns and night/day periods studied.