Criação de juvenis de lambari do rabo amarelo (Astyanax altiparanae) em sistemas de bioflocos e sistemas de recirculação de água em diferentes densidades de estocagem

Abstract

Aquaculture has been gaining ground in recent years in the production of freshwater fish, so the concern about water resources only increases. In this context, closed rearing systems such as bioflocks (BFT) and recirculation systems (RAS) are being highlighted by the reuse of water, with the same change being null or small due to evaporation. The present work was developed to evaluate the development of the yellow tailed lambari (Astyanax altiparanae), in different densities using two different systems, water recirculation system (RAS) and bioflocks (BFT). The animals were stocked at three different densities, being 3, 5 and 7 fish per liter, totaling 6 treatments (3 RAS and 3 BFT), which were performed in triplicates for 20 days. The fish were fed with 38% crude protein commercial feed, being offered 20% of the initial biomass twice a day. The results show that there was significant difference between the two systems. The study shows that the RAS water recirculation system outperformed the bioflocks in relation to the performance of the yellow tailed lambari.