Effects of Different Carbon Sources on Growth and Some Innate Immune Responses of Russian Sturgeon (Acipenser gueldenstaedtii) in Biofloc Systems

The Russian sturgeon (Acipenser gueldenstaedtii) species is in high demand owing to its valuable caviar. Therefore, it danger of extinction. Since the reaches sexual maturity late life cycle, this has a economic cost for farmers. However, can be reduced with an environmentally friendly system called biofloc technology. This study compared growth performance and health indicators groups using different carbon sources such as starch (BS), molasses (BM) dextrose (BD). In 60-day study, fish average initial weight 106.44±5.79 g were stocked tanks at density 21 fish/tank (0.4 m3/tank). water temperature was set 19 ℃ degrees throughout study. On 30th 60th days experiment, weighted measure parameters sampled immune indices. No mortality observed any group A between comparison gain revealed that BS BM (105.51±2.26; 100.50±2.18) performed better than control (BC, without external sources) BD (95.90±2.09; 87.36±2.18) (P<0.05). Furthermore, FCR SGR calculated from data obtained end shows statistically more effective other groups. Moreover, NBT, lysozyme myeloperoxidase enzyme activities indicated all BFT had stronger According results, immune-enhancing effect determined, reported are suitable use terms SGR, they result production.