Effect of Bactocell® (Pediococcus acidilactici) on growth performance and antioxidant defense in Koi (Cyprinus rubrofuscus)

This study was performed to evaluate the effects of feeding with Bactocell® (BA) on microbial flora and morphology of intestine, growth performance, and antioxidant defense in koi fish. ۳۰۰ koi fish were divided into four groups with three replications. Groups included control group (basic diet, BD), T۱ (۰.۰۲ g BA / kg BD), T۲ (۰.۰۳ g BA / kg BD) and T۳ (۰.۰۴ g BA / kg basal diet). The studied fish were fed these diets for ۶۰ days. Sampling was performed at the end of the test to evaluate the growth performance, microbial flora and morphology of fish intestines. Also, the effect of probiotic on the plasma antioxidant indices was evaluated on days ۰, ۳۰, and ۶۰. Based on the results, the highest growth rate of Lactobacillus colonies was observed in the T۱ group (p<۰.۰۵). The highest increase in length and width of the intestinal fold was reported in T۱ (p<۰.۰۵). The highest growth rate was recorded in T۳ and then T۲ and T۱ compared to the control group (p<۰.۰۵). The results also showed an increase in antioxidant defense and a decrease in oxidative stress in groups fed BA. The highest increase in SOD was reported in T۱ (p<۰.۰۵) while no significant difference was observed in plasma MDA level at the end of the experiment (p>۰.۰۵). Generally, the results showed the positive effects of feeding with BA on the growth performance and antioxidant defense of ornamental Koi fish.

کلیدواژه ها:

Pediococcus acidilactici ، Koi fish ، SOD ، MDA