Monografias, Dissertações e Teses

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    Desempenho de juvenis de tilápias-do-Nilo alimentados com aditivo probiótico Colostrum Aqua®
    (Universidade Brasil, 2024) Albuquerque, Ramiro Rocha de; Mansano, Cleber Fernando Menegasso
    The addition of feed additives in animal diets appears as an alternative to increase production, profitability and reduce the emission of production effluents to the environment. Thus, the objective of this study was to evaluate the productive performance, body protein retention efficiency and biochemical parameters of juvenile Nile tilapia fed diets supplemented with the probiotic additive Colostrum Aqua® (Lactobacillus sp., Enterococcus faecium, Bacillus pumilus, Bacillus velezensis, Bacillus subtilis). A total of 225 juveniles of Nile tilapia (Oreochromis niloticus), with an average initial weight of 15.95 ± 2.6 g, were randomly distributed in 15 150 L aquariums, in a stocking density of 15 fish/aquarium. A basal diet (Control) was formulated, which was supplemented with two levels of the Test Probiotic: 0.1 and 0.2 g/kg. The fish were weighed on a precision scale (0.01 g) at the beginning of the experimental period and at the end of the 90-day period, to obtain weight gain. The experimental design was completely randomized with three treatments and five replications, with 15 fish per plot. Performance data were analyzed using the SAS® 2014 software, using analysis of variance (ANOVA), normality of errors (Cramer-Von-Mises) and homoscedasticity of variance (Leveve). When statistical significance was observed, Duncan's test (p<0.05) was applied to compare the means and the standard error of the means (SE). It was found that the addition of the probiotic to the diet (0.1 g/kg or 0.2 g/kg) promoted a significant improvement (p<0.01) in the variable of weight gain (164.1±4.0 g and 158.8±3.8 g, respectively), compared to the control treatment (140.6±4.5 g). A statistical difference (p<0.05) was observed in the composition of body protein, and the fish that received 0.2% of probiotic additive obtained the highest accumulation of body protein, a value that directly reflected in the value of protein retention efficiency, which refers to the best use of this component. It is concluded that the inclusion of probiotics from 0.1 g/kg provides weight gain in Nile tilapia from 15 to 200 g of live weight.