The Effect of different levels of galactooligosaccharide prebiotic on growth performance, survival, and some blood biochemical parameters of juvenile Binni fish (Mesopotamichthys sharpeyi)

In this study, the effects of different levels of galactooligasaccharide prebiotics on growth performance, survival, and some blood biochemical parameters of Binni fish, Mesopotamichthys sharpeyi was investigated. 240 fish with weight of 12.11 ± 0.1 g were fed in four treatments with three replications including: control group, T1 (1% prebiotic), T2 (2% prebiotic), T3 (3% prebiotic) for 56 days. The results showed that the final weight of fish in T2 was significantly increased compared to the control and the other treatments (P<0.05). The feed conversion ratio (FCR) in treatments with prebiotics was significantly improved compared to the control (P<0.05). The feed efficiency (FE) increased considerably in the treatments with prebiotics compared to the control group (P<0.05). The protein content of fish body in T1 and T2 treatments was significantly higher than the control (P<0.05). Also, the lipid content of fish body in T2 was significantly lower than the control group (P<0.05). The amounts of protein and albumin in fish plasma increased compared to the control group. But, the amounts of triglyceride, cholesterol, LDL showed significantly reduction in T2 treatment compared to the control group (P<0.05). While, the amount of HDL significantly increased (P<0.05). This study showed that the use of galactooligosaccharide up to 20 g per kg diet leads to the improvement of the assayed biological indices.