Autoclaved cowpea in the nutrition of juvenile tambaqui

The objective of this work was to evaluate the effect of the inclusion of cowpea (Vigna unguiculata) in diets on the performance of juvenile tambaqui (Colossoma macropomum). The experiment was carried out in a completely randomized design with three replicates of 20 juvenile tambaqui (10 g), allocated in 310-L water tanks. The fish were fed for 60 days with isonitrogenous and isoenergetic diets, with six inclusion levels of cowpea: 0, 5, 10, 15, 20, and 25%. Body and productive performance relations were determined. There was no significant difference between treatments. Juvenile tambaqui can be fed with the inclusion of up to 25% cowpea in the diet.