Productive performance of tambacus fed diets supplemented with vitamin E

Abstract

The objective of this work was to evaluate the effects of tambacu vitamin E dietary supplementation on performance and hematological variables, and determine the relationship of glutathione peroxidase activity with vitamin E and selenium suplementation. Two hundred and fifty juvenile tambacus were used, divided into 25 aquaria. The basal diet was pelleted with 32% of crude protein and 3,300 kcal kg^-1 of digestible energy, with 0.40 mg kg^-1 Se. Test diets – isoproteic and isocaloric – were composed of the basal diet with increasing vitamin E concentrations (0, 100, 200, 300, 400 mg kg^-1), in a completely randomized design, with five treatments and five replications. No significant effect of vitamin E supplementation was observed on total length, mean corpuscular volume, mean corpuscular hemoglobin concentration and total erythrocyte, and on the enzymatic activity of glutathione peroxidase. However, final weight and apparent feed conversion were significantly affected by supplemented treatments. Standard length and weight gain improved using diets supplemented with 400 mg kg^-1 of vitamin E. Dietary vitamin E supplementation results in better tambacu performance.