Avaliação do ganho de biomassa de alevinos de tilápia (Oreochromis niloticus) alimentados com silagem biológica de resíduos de pescado

Abstract

The effects of substituting fish ration for 4 fish residual biological silage levels aiming biomass evolution gain in tilapia alevins were evaluated. The experiment was made, in an experimental delineation entirely at random within 150 male and female alevins which were approximately 90 days old. There were two different kinds of treatment for each tank: (T) To to T4. The rations contained 0; 10; 20 and 30% of fish residual biological silage. The initial biomass gain was from 95,0 ± 9,61 a 97,15 ± 8,55g, reaching values between (T1) 272,90±36,62 e (T4) 326,54 ± 76,6g. The rations were formulated to contain 25% of crude protein. There was no meaningful effect over the studied characteristics. We got to the conclusion that the addition of up to 30% of fish residual biological silage (T3) favors the good performance of the fish concerning biomass gain.