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[Objective]This experiment was conducted on Pseudosciaena crocea to study the effects of mannan oligosaccharides on growth and antibacterial ability. [Method]1 500 experimental fishes were divided into five groups. The control group( C) contained no mannan oligosaccharides,the treatment groups were contained 100,200,400,800 mg /kg of konjac mannan oligosaccharides in basal diet,respectively. The experiment continued 4 months. [Result]The results showed that Konjac Mannan oligosaccharides could significantly improve weight gain Pseudosciaena crocea. Compared with control group,Test 2 group intestine protease activity increased by 45. 74%,hepatopancreatic lipase activity increased by 31. 37%,amylase activity increased by 27. 16%. Comparison with the control group,the test group serum SOD activity was significantly higher than that in the control group( P <0. 05). Lysozyme( LZM) activity,spleen and serum test group was significantly higher than that in the control group( P <0.05). Pseudosciaena crocea were infected by Anguillarum,compared with control group,the survival rate is higher than that of the control group( P <0. 05) when the dosage of 200 mg /kg,400 mg /kg. [Conclusion]According to the test results,the Konjac Mannan oligosaccharides in the basal diet suitable dosage were 200 mg /kg.
[Objective] This experiment was conducted on Pseudosciaena crocea to study the effects of mannan oligosaccharides on growth and antibacterial ability. [Method] 1 500 experimental fishes were divided into five groups. The control group (C) contained no mannan oligosaccharides, the treatment groups were compared with control groups, Test 2 group intestine protease activity increased by 45. 74%, hepatopancreatic lipase activity increased by 31. 37%, amylase activity increased by 27. 16%. Comparison with the control group, the test group serum SOD activity was significantly higher than that in the control group (P <0.05). Lysozyme (LZM) activity, spleen and serum test group was significantly higher than that in the control group (P <0.05). Pseudos ciaena crocea were infected by Anguillarum, compared with control group, the survival rate is higher than that of the control group (P <0. 05) when the dosage of 200 mg / kg, 400 mg / kg. test results, the Konjac Mannan oligosaccharides in the basal diet suitable dosage were 200 mg / kg.