Probiótico na dieta de carpa comum (Cyprinus carpio)

Abstract

Aquaculture has shown significant growth in recent years. Intensive fish production systems is increasing population density of animals in a intensive management. Consequently, certain level of stress has increased, as well, and so, the susceptibility to diseases has decreased the performance. Furthermore, there are good management practices; one of them includes the use of additives to improve the health and performance of the animal. The aim of this study was to determine the effect of supplementation of a commercial probiotic Bacillus subtilis on the basis of the diet on the performance of the common carp. Fingerlings (0.35 ± 0.09 g) were distributed in twelve 60-liter tanks (30 fishes each) and fed for 45 days with ration containing 0.0 % probiotic (control), 0.15%; 0.30% and 0.45% with probiotic addition in a completely randomized experiment (n = 3) and evaluated as for the performance. .The supplementation of probiotics in the diet had no effect (p> 0.05) on performance parameters, chemical analysis of carcass and not the number of colony forming units (UFC / g) compared to the control group. However, significant effect (p <0.001) in villus height and in thickness of the muscular layer was observed. Contradictory results show that studies concerning the use of probiotics in fish nutrition are still needed to clarify their mecanisms of action.