Crude Protein in Developing Curimbas (Prochilodus scrofa)

Abstract

The study aimed to evaluate the performance of curimbas fed different levels of crude protein in the ration. The experiment lasted six months, using 3413 curimbas fingerlings, with average initial weight of 10g, distributed in five tanks of land, with 273 m² each, at a density of 2.5 fish / m³. The treatments were: T1 - commercial diet with 28% crude protein, T2 - commercial diet with 32% crude protein, T3 - commercial diets with 36% crude protein, T4 - commercial diet with 40% crude protein and T5 - commercial diet with 44% crude protein. Diets were provided twice a day in a rate of 5% of body weight. The experimental design was completely randomized (CRD), in a factorial scheme 5x5, with five diets (28%, 32%, 36%, 40% and 44% CP) and five sampling times (30, 60, 90, 120 and 150 days), with 10 repetitions. The sampling for data collection were performed monthly at each stage of the experiment, and removed 10 fish per treatment, at each sample for evaluation of performance parameters. It was evaluated total length, standard length, body height and weight of animals. The data were submitted to variance analysis and treatment means to the regression with a significance of 5%. There was no statistical difference for the parameters of  treatments T1, T2, T3 and T4. Only T5 presented statistical difference in all parameters studied.