Substituição parcial do farelo de milho por raspa de mandioca em dietas para juvenis de tilápia do Nilo (Oreochromis niloticus)

Abstract

This study sought to analyze the zootechnical performance of juvenile Nile tilapia (Oreochromis niloticus) fed diets based on cassava chips. The animals were fed diets containing cassava chips as a substitute for corn bran, at levels of 0%, 5%, 10% and 15% during the 21- day experiment. The experimental design used was entirely randomized, with four treatments and four replications, 15 fish per experimental unit, containing different levels of cassava chips as a partial substitute for corn. The experiment included 240 juvenile Nile tilapia subjected to different levels of corn substitution with cassava chips. A recirculating water system (RAS) was used, a method by which the water in the rearing system is continuously treated and reused, from which it is conveyed by gravity via a sump and biological filter. The addition of cassava chips to the diets tested did not lead to statistically significant differences (p>0.05) in any of the variables analyzed. Therefore, the inclusion of up to 15% cassavam chips in the diet can be carried out without harming production performance, making it a viable alternative.