The effect of diet containing specific probiotics on some growth, immunity, kidney enzymes and bacterial flora of the intestine in rearing of fingerling Persian sturgeon, Acipenser persicus

This study carried out to increase production efficiency Persian sturgeon fingerling. For this experiment, in four treatments, 600 Acipenser persicus fingerling (10.76 ± 0.74 g and 14.49 ± 0.7 cm) were introduced into 12 fiberglass tanks with 300 liters water. The fingerlings were reared for 60 days. The diets with 150, 300 and 450 mg of 4 bacterial strains Lactococcus lactis, Pediococcus pentosaceus, Weissella cibaria and Enterococcus faecalis (powder per 1-kg of pelleted diets to make certain concentrations 1.5 × 109 (T2), 3 × 109 (T3) and 4.5 × 109 CFU/g (T4). The diet of the control group (T1) was also free of probiotic bacteria. The results showed that there was no significant difference in growth indices in different treatments (p>0.05), but the maximum and minimum mean final weight were observed in juveniles of T2 and T1, respectively. The results of liver enzymatic indices and LDH, IgM and lysozyme activity and the number of colonial intestine bacterial flora showed that the minimum and maximum values of these indices were observed with significant differences in T2 and T1, respectively (p < 0.05). The maximum and minimum number of intestinal lactic acid (probiotic) bacteria also occurred in T2 and T4 with a significant difference respectively (p < 0.05). In spite of the fact that a diet containing probiotics could not have a significant effect on growth indices in Persian sturgeon fingerling in the weight range of 10-60g, but the diet of containing probiotics with 1.5×109 concentration (T2), significantly improved the safety, enzymatic and bacterial flora of the intestine.