Probiótico, Prebiótico E Simbiótico Na Nutrição De Alevinos De Tilápia Do Nilo Oreochromis Niloticus

Abstract

This experiment was conducted with the aim of using the yeast Saccharomyces cerevisiae as probiotic, the prebiotic mannanoligosaccharide (MOS) and synbiotic as both in the feed to nourish fingerlings of Nile tilapia (Oreochromis niloticus), evaluating the performance and intestinal morphology after 60 days. 400 tilapia fingerlings of Nile Gift lineage with average weight and length of 9.2 ± 0.5 g and 8.0 ± 0.5 cm were used, distributed in twenty 60 liter polyethylene tanks in a completely randomized design, with four treatments and five replications. The treatments consisted of a control diet; 0.2% probiotic; 0.2% prebiotic; 0.2% and 0.2% probiotic + prebiotic. The use of additives influenced feed intake and feed conversion (P < 0.01). There was no significant difference in survival rate and weight at 30 and 60 days, intestine length and weight gain. Supplementation with additives showed improvement in the intestinal epithelium of the fingerlings. The probiotic treatment resulted in fewer goblet cells (P < 0.05) when compared to values obtained by fingerlings receiving the other diets and greater amount of villi in relation to the control treatment. As for the height of the villi, treatment with probiotic and symbiotic differed from the control without differing from each other. The results may indicate a positive influence on differentiation of the intestinal epithelium, thereby fish tend to be less likely to pathogens and other challenges.