mia franciscana culture by recirculation system using biofloc technology and its effects on growth and reproductive performance

The aim of this study was to evaluate the effects of molasses and raffinate as carbon source on quantity of biofloc, in this study Molasses and Rafinat were used as carbon sources of the biofloc system, also a diet contains rice bran and yeast set as control. Bioflocs were grown in 7 L reactors for 22 days on the following carbonaceous substrates: molasses and rafinat, and the produced biofloc was used in artemia diet in three nutritional treatments for 21 day, Treatment1: Biofloc produced by molsses+Dunaliella  (% 5 of nutritional requirement of Artemia),Treatment2: Biofloc produced by rafinat+Dunaliella (% 5 of nutritional requirement of Artemia),Treatment3: Rice bran and yeast+Dunaliella; some parameters like biofloc volume growth and survival indices and reproductive performance of Artemia and microbial load of water was measured. According to obtained results, raffinate could significantly enhance floc volume during the experimental period, molasses significantly increase the dominance of heterotrophic bacteria and fungi, the obtained result has shown that the molasses and rafinat can enhance physicochemical parameters of water, and that can use to produce artemia with the comparability quality with artemia cultured with commercial food, and molasses and raffinate can use as carbon sources in the biofloc system to reach cheaper products, anyway we cant recommend raffinate as individual carbon source in biofloc system to enhance water quality due to the low C:N ratio.