The effects of dietary enzyme on some blood biochemical parameters of the cultured great sturgeon Huso huso juveniles

In this study the effects of dietary exogenous enzyme (Kemin®; 0, 250, 500, 750 and 1,000 mg/kg) on certain blood biochemical parameters (total protein, glucose, cholesterol) and serum magnesium in cultured great sturgeon (Huso huso) juveniles were determined. Juveniles (mean weight 10.2 ± 0.8 g) were fed three times a day at 5–10% body weight for 46 days. Serum total protein concentration remained unaffected except in fish fed with 750 mg/kg enzyme which was significantly higher than the other treatments. Although dietary enzyme did not affect the glucose level in juveniles fed with 1,000 mg/kg enzyme, its level decreased significantly in other groups. Serum cholesterol of the fish decreased in all treatments except in fish fed 750 mg/kg dietary enzyme. Magnesium levels were higher in the groups that received 500–750 mg/kg dietary enzyme.