LARVICULTURE OF Lophiosilurus alexandri IN DIFFERENT COLORS OF AQUARIUM AND LUMINOSITIES

The well-being promoted by the environment, in particular those that interfere with visual perception, are of paramount importance in fish culture optimization. Knowing that environmental parameters outside the ideal range may increase the negative effect on the performance of production, the objective of this study was to determine the effect of aquarium color and brightness in the larvae of pacamã Lophiosilurus alexandri rearing.

The larvae were subjected to two aquarium colors (black and white) and two luminosities: no incidence of light (0 lux), when the tanks were covered with black canvas and incidence of light (88 lux), when the tanks remained open . The experimental design was completely randomized with five replications in a factorial 2 x 2. The experiment was conducted for 25 days. The pacamãs were distributed in aquariums with a volume of 08 L, a density of 60 fish of aquarium. We evaluated weight, standard length and total biomass and survival, and skin pigmentation.

It was observed that black tanks are not recommended for creating pacamã larvae therefore adversely influenced survival rates (Table 1). The interaction between black and aquariums without light reduced the biomass and the Fulton´s condition factor (Table 2). It is indicated for post larvae cultivation pacamãs the use of white aquariums, and luminosities between 0 and 88 lux, it does not affect the performance of the larvae.