Cultivo de Artemia sp a partir de dietas alternativas usando subproduto agrícola (farelo de arroz) e levedura (Saccharomyces cerevisiae) como fonte de alimento

Abstract

Aiming to evaluate the survival and getting biomass of Artemia sp, using the agricultural sub product (rice bran) and yeast Saccharomyces cerevisiae as food source, a cultivation was carried out in the AQUAPESCA company, during twelve days the experimental design was completely caused by five treatment in triplicate, for that, was done a pre-cultvation of microalga Clorella sp during fifteen days, in order to grow artemia, was used a density of 100 nauplii/ L in pet bottles with 1L of each useful volume, and the food was divided in two stages. In the first offended phase 0,2 g / L and in the second stage , from 7th day, the amount of food increased to 0.35 g / L and this amount was maintained until the end of second experiment which before administrate the diets, they were previously homogenized using a grinder during 15 minutes. All treatment were submitted to continuous aeration, pH, temperature, salinity and dissolved oxygen, in addition to the daily renew of 50% of the water volume. The results of the research did not have the significant differences between treatments for pH, temperature and salinity for pH. The same tendencies were observed for both survival and biomass production, with emphasis on the algae and yeast mixture treatment diet which had 88% ± 0.023 and 0.84 ± 0.03 respectively, whereas treatment with rice bran had the lowest survival number 65% ± 0.016 as well as biomass 0.42 ± 0.06. Thus, the results demonstrate1 that rice bran and yeast Saccharomyces cerevisiae can be used for the cultivation of artemia because they have potential to guarantee their survival and obtaining biomass.