Zootechnical indices and digestibility in juveniles of tambaqui Colossoma macropomum fed a diet containing particulate maize

Abstract Three experiments were done with different particle sizes of corn feed on its zootechnical performance, passing rate and apparent digestibility juvenile tambaqui (Colossoma macropomum). In the first, 200 juveniles used distributed in 20 tanks (220 L), 10 fish per unit (four replicates). The experimental system to record passage time was composed five incubators L. second, 75 55 days (three replications). third, All performed randomly. Different linear behavior treatments observed for crude protein; smaller size (150 μm) had better results digestibility. results, affected growth performance protein ether extract. Thus, is recommended that a 150 μm be tambaqui.