Efeito da utilização da castanha-do-pará Bertholletia excelsa na dieta de juvenis de jundiá Rhamdia quelen

Abstract

This work aimed to evaluate the effect of the inclusion of Pará-nut (Bertholletia excelsa) in the diet of juvenile silver catfish (Rhamdia quelen) about the performance. The experiment was conducted during 28 days using a water recirculation system with thermoregulation temperature. Were used 50 juvenile silver catfish, with 10 fingerlings per experimental unit, randomly distributed in 10 experimental unit were randomly divided into 10 plots, divided into five treatments, with the inclusions of 0 %, 3 %, 6 %, 9% and 12% of Pará-nut and 2 replicates. The feeding was done 2 times a day (9 am and 4:0 pm), being made the siphoning of solid waste before, resulting in a daily renewal of water of 5 to 10%. The experimental design was completely randomized. The data were subjected to analysis of variance and Tukey test, at 5% of significance, averages compared by regression analysis. The results obtained in the experiment showed significant differences (P<0.05) for final weight and average daily gain. The results for total length, standard length, carcass yield, protein efficiency ratio, body protein deposition and deposition of body fat did not differ significantly between treatments tested. We concluded that a balanced diet with levels of inclusion of Pará-nut similar to experiment for the formulation of feed for juvenile silver catfish does not change the zootechnical performance of the animals.