Variações no comprimento e ganho de peso dos alevinos de tilápia do Nilo (Oreochromis niloticus), alimentados com rações contendo diferentes níveis de silagem biológica de resíduos de pescado após 97 dias de cultivo

Abstract

Enzymatic hydrolysis as a final product that had the biological silage was produced by mixing fish waste ground, with a yeast-based regional plant. The addition levels of biological silage fish used were: 0.10, 20 and 30%, embedded in a protein meal (T1, T2, T3 and T4, respectively) and biologically evaluated through the performance of tilapia (Oreochromis niloticus), and compared to a control diet protein whose base consisted of meat and bone meal and fish meal (T1). These diets were formulated so that they were isonitrogenous and isocaloric. For each treatment, 2 replicates were performed in tanks square brick with an average of six fish per tank (average weight 15.32 g 1.5 0.22 and 9.58 cm in length default). The experiment lasted 97 days, with all the fish sampled every 15 days and fed once a day basis to 3% of the total biomass of each tank. It was observed that the fish receiving treatment T1 showed a mean weight gain 0.5g days, whereas animals receiving the same treatment T2 produced a mean weight gain (O 5g/day) CAA 2, 01 and PE of 1.58. Statistical analysis showed no significant difference (p> 0.05) between treatments for weight and length. This study suggests the feasibility of biological silage from fish waste based alternative protein and as potential replacement of fish meal and meat and bone meal in feed for tilapia.