Incorporação de substâncias bioativas da farinha da casca de jabuticaba na alimentação de kinguio (Carassius auratus)

Abstract

The objective of this work was to evaluate the incorporation of jabuticaba bark meal into the productive performance, biochemical and enzymatic parameters and the influence of Carassius auratus. 72 C. auratus specimens were distributed in a completely randomized design, containing four treatments and three replicates, with six fish per experimental unit. The levels of flour addition of jabuticaba bark (JBF) were: 0.00; 1.00; 1.50 and 2.00%. Fish with mean initial weight of 9.67 ± 0.37 g and total length 7.38 ± 0.18 cm were fed twice for 60 days. The inclusion of JBF increased feed intake indicating the palatability of the product. There was a significant difference in relation to feed intake and specific growth rate and condition factor in treatments with inclusion of JBF. There was an increase of intensity in relation to the luminosity and the yellow hue, where the highest values were obtained in the fish fed with inclusion of 1,00 and 1,50% of the JBF. The biochemical parameters of triglycerides and cholesterol showed no difference with the inclusion of JBF. However, inclusion of 2.00% JBF provided an increase in circulating glucose. AST activity was higher in fish fed diets containing 1.00 and 2.00% JBF; the ALT presented a reduction in its activity against the variation of inclusion of JBF when compared to the control group; However, hepatic triglyceride levels presented a difference (P>0.05) as the inclusion of JBF increased. In relation to the digestive enzymes, a significant difference (P>0.05) regarding lipase was observed in the groups with inclusion of 1.00 and 2.00% of JBF, due to the increase in feed consumption stimulating the higher lipase activity. Amylase, nonspecific Protease, and Alkaline Phosphatase showed no difference in relation to dietary variation. It is concluded that the inclusion of jabuticaba shell meal is efficient as a food additive and that its inclusion has a hepatoprotective effect, it is effective at the level of up to 1,5% in order to increase the luminosity of Carassius auratus.