Avaliação do efeito dos bioflocos produzidos com bactérias autóctones e com probióticos comercias no cultivo intensivo de camarão marinho Penaeus vannamei em sistema de baixa salinidade

Abstract

The objective of the present work was to evaluate the effect of bioflocs formed with autochthonous nitrifying bacteria and commercial probiotics on water quality and the growth of marine shrimp Penaeus vannamei in an intensive low salinity system. The experiment was conducted with the evaluation of two experimental groups: supplemented with commercial probiotic (BF-PC) and supplemented with autochthonous probiotic bacteria (BF-PA). In the obtained results, shrimp cultivated with the BF-PA treatment showed higher survival rate, growth in average weight, final biomass and productivity compared to animals in the BF-PC treatment. The environmental variables of the cultivation water (pH, dissolved oxygen, and temperature) showed the same behaviour in the treatments. Therefore, the use of autochthonous nitrifying bacterial strains in the biofloc system, used in the BF-PA treatment, promoted a mores stable environment, which resulted in an improvement in the zootechnical performance of the shrimp.