Multispecies probiotic effects on juvenile tambaqui zootechnical performance and water bioremediation

Abstract

The objective of this work was to evaluate the effects of a multispecies commercial probiotic, at different concentrations and routes of administration, on water quality, zootechnical performance, and sediment bioremediation in rearing tanks of juvenile tambaqui (Colossoma macropomum). Six treatments were established during - PR 60 days: one without (control) and five with probiotic administration (in feed - PR; in water, at the recommended concentration by the manufacturer - PA1; in water, at a concentration three times the recommended - PA3; in water, at a concentration six times the recommended - PA6; and in water and feed - PRA). Four replicates were carried out per treatment. For the analysis of bioremediation, sediment from the fish farms was added to the experimental tanks. The administered doses and routes were proven safe. No significant differences were observed between treatments for water quality variables, except for turbidity. Multispecies probiotic enhanced sediment organic matter degradation at the bottom of the tanks in PA3 and PA6. The multispecies probiotic promotes the oxidation of organic matter, enhancing the rearing environment of tambaqui. The use of sediment from the bottom of fish farms is effective in emulating a production system in laboratory.