Resumo:
The research aimed to evaluate the effect of Moringa oleifera leaf extract (MLE) in the feeding of colored carp (Cyprinus carpio), in the form of spheres and included in the diet.
The spheres are obtained from the encapsulation technique that consists of adding the MLE to the sodium alginate, this solution is added in drops to the calcium chloride, after this series, the MLE spheres are formed. 96 juveniles of colored carp were used, with 25.87 (± 4.97) g. Juveniles were equally distributed in 16 aquariums in recirculation systems. The experiment was carried out in a completely randomized design with four treatments and four repetitions. The different diets during the experimental period were: basal diet (T1); diet with inclusion of 20 mL of MLE (T2); basal diet and spheres with 20 mL of MLE (T3); basal diet and spheres with MLE 0 mL of MLE (T4), lasting 60 days.
On the last day, biometry and blood samples were obtained for performance indices and hematological and biochemical parameters in the animals before and after the stress challenge, which was exposure to air and lasted 300 seconds. The supplementation with MLE did not affect the consumption of diets, whether with or without alginate spheres, not affecting the performance indices and body composition of the fish. The T3 group showed a significant increase (p≤0.05) in the plasma albumin level in the period before the stress. The MLE had a significant influence (p≤0.05) in the increase in total cholesterol and aminotransferase enzyme (AST) after the stress of exposure to air in the T3 group, in relation to T1 and T4, the other parameters, alanine aminotransferase enzyme (ALT), glucose, total protein, albumin, triglycerides, HDL and LDL showed no significant difference in any of the steps. In conclusion, the use of moringa leaf extract did not affect the performance and proximate composition of the carcass and had adverse effects on the biochemical parameters of carp.
