ABSTRACT An experiment was conducted during 60 days with forty pacu males fed diets supplemented with increasing concentrations of ractopamine (0.00, 11.25, 22.50, 33.75, and 45.00 mg kg−1). Eight fish were evaluated for each experimental diet. Performance and survival rate of the fish were measured. At the end of the experiment, blood was collected to determine the levels of cortisol, triacylglycerol, and protein. Moreover, the liver was collected to determine the activities of glucose-6-phosphate dehydrogenase and malic enzymes. The fillets […]

Objetivou-se neste estudo avaliar o efeito da adição de ractopamina, cromo-metionina e suas combinações em dietas para suínos em crescimento e terminação sobre o desempenho, as características de carcaça e a qualidade da carne. Sessenta e quatro suínos da linhagem Topigs, com peso inicial de 26,56 ± 3,11 kg, foram distribuídos em delineamento experimental de blocos casualizados em esquema fatorial 2 x 2, com dois níveis de ractopamina (0 e 5 ppm) e dois níveis de cromo-metionina (0 e 400 […]