Farelo de soja e farelo de castanha da Amazônia como substituto da proteína animal na dieta de juvenis de matrinxã: aspectos zootécnicos, fisiológicos e econômicos

Abstract

Matrinxã (Brycon amazonicus) is a species native from the Amazon Basin whith omnivorous feeding habit, which has high commercial value. Features such as rapid growth, rusticity and acceptability of artificial food highlight this species for breeding in intensive cropping systems. The food may correspond to up to 70% of production costs, the protein represented by the fish meal the most expensive nutrient. In order to reduce costs of production plants has sought alternative sources to replace fish meal in the formulation of commercial diets. This work verified the feasibility of inclusion of increasing levels of soybean meal (Glicine max) meal and brown of the Amazon (Bertholletia excelsa) in the diet of juvenile matrinxã, evaluating parameters zootechnical, physiological and comparing the costs of each experimental diet . In this experiment 420 fish were distributed in 21 tanks of pvc in a completely randomized design with seven treatments, C0, C15, C30, C45, S15, S30 and S45, corresponding to the control and treatment with replacement of fishmeal by increasing levels (15, 30 and 45%) of replacement of fishmeal by soybean meal and brown respectively. For the variables analyzed, no significant difference between treatments, indicating that it is possible to include up to 45% of the Amazon nut meal in diets for juvenile matrinxã without harming the performance of fish, and no change in their physiological indicators of stress.