Desempenho de juvenis da tilápia-do-Nilo em sistemas de bioflocos sob diferentes densidades de estocagem

Abstract

This study aimed to evaluate the performance of juvenile of Nile tilapia at different densities in bioflocos system. 800 juveniles were used tilapia with average weight of 5.96 ± 0.35 g. Fishes were distributed in 16 boxes with 200 liters of water, forming a randomized design with four treatments and four replications. The fishes were stocked in densities of 100, 200, 300 and 400 fishes per cubic meter. During 60 days, the fishes were fed commercial feed with 42% crude protein to satiety. The physical and chemical parameters of water, temperature, dissolved oxygen, pH, alkalinity, ammonia and nitrite were monitored throughout the experiment. For the evaluation of the production performance was benchmarked final biomass, biomass gain, final weight, weight gain, apparent feed intake, feed conversion and survival. The increase in stocking density promoted an increase in the biomass gain and consequently the final biomass. However, a reduction was seen for weight gain parameters, body weight and apparent feed intake. Though, the evaluated stocking densities proved viable for juvenile Nile tilapia in bioflocos system.