Diferentes meios de cultivo na produção de platy (Xiphophorus maculatus)

Abstract

The choice of a super intensive recirculation system for fish production is related to the productivity which it provides. In addition, these systems can be enriched with fertilizer management for the formation of biofloc with unicellular alga inoculant. The study aimed to evaluate the performance in the cultivation of Platy (Xiphophorus maculatus). One hundred sixty fish were distributed in sixteen tanks, divided into four independent closed water of systems recirculation, with the density of ten fish per experimental unit. The food handling constituted the offer of 5% of the live weight of feed for 56 days. The treatments were: AC (water - control); AA (Water + Alga Ankistrodesmus sp.); BC (Biofloc) and BCA (Biofloc + Alga Ankistrodesmus sp.), in a completely randomized design. The physico-chemical parameters of the water remain within appropriate levels for the cultivation of the species. The parameters weight gain, specific growth rate, condition factor and survival were analyzed. The cultivation of Platy (Xiphophorus maculatus) in BC systems (Biofloc) and BCA (Biofloc + Alga Ankistrodesmus sp.) presented increas in weight, total and standard length and in all performance variables, indicating a promising alternative in optimizing its production.