Tilápia do Nilo sob diferentes desafios sanitários com suplementação probiótica

Abstract

The objective of the research is to evaluate the productive performance of Nile tilapia fingerlings submitted to different sources of organic fertilizers fed with commercial probiotic feed. The experiment lasted for 60 days, in which the animals were submitted to a completely randomized experimental design in a crop with no source of organic fertilizer and most commercial probiotics fertilizer sources (bovine fertilizer + 5 mg of probiotic / kg of feed; pig + 5 mg probiotic / kg feed, sheep fertilizer + 5 mg probiotic / kg feed) with four replications. The closed water recirculation system consisted of 16 experimental units with a volume of 60 L and each experimental unit consisted of a box containing 25 fish. Biometrics took place biweekly and the variables of productive performance were monitored. The parameters of the physical and chemical water variables were monitored. Five fish individuals were randomly selected for bowel extraction to quantify the number of total coliforms total bacteria and colonization by probiotics. With the production performance data of the experiments the assumptions of normality and homogeneity at 5% of the residues were verified by the Shapiro- Wilk and Levene tests. They were submitted to ANOVA with 5% significance and in case of significant difference between at least one of the treatments the means were compared by Tukey at 5%. At the end of the experiment it was verified the most appropriate source of fertilizer in the management and growth of Nile tilapia fingerlings submitted to commercial probiotic. It was concluded that the use of commercial probiotic for male Nile tilapia fingerlings on different health challenges significantly affected the productive performance. Among the organic fertilizers employed in the experiment, sheep was considered the most appropriate with the addition of probiotic in Nile tilapia diets resulting in improvements in the parameters analyzed.