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《Journal of Anhui Agricultural Sciences》 2008-16
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Effect of Different Protein Levels on Digestive Enzymes Activity of Mud Carp

JIANG Ju-feng et al (South China Sea Fisheries Research Institute,China Academy of Fishery Sciences,Guangzhou,Guangdong 510300)  
With Peru fishmeal as dietary protein sources,the effect of feed with 4 kinds of protein levels(20%,30%,40% and 50%) on digestive enzyme activities of intestine and hepatopancreas of mud carp(Cirrhinus molitorella) were studied.The result showed that the specific activity of the protease of intestine and hepatopancreas was raised somewhat with the increase of dietary protein level,among which,the difference between Group 50% and Group 20% was extremely significant(P 0.01),Group 40% and Group 20% had remarkable difference(P 0.05).The specific activity of amylase of intestine and hepatopancreas was slightly decreased with the increase of dietary protein level and Group 50% had a significant difference from Group 20% and Group 30%(P0.05).The specific activity of lipase was slightly reduced with the increase of dietary protein level,the difference between Group 20% and Group 30%,between Group 40% and Group 50% were greatly remarkable(P 0.01),and no obvious difference was found among other groups(P0.05).In four weeks before the experiment,the specific activities of digestive enzyme of mud carp were all raised somewhat,and increased up to the maximal value after 4 weeks,and then decreased slightly,but were remained at stable level constantly,which showed that the digestive enzyme activities of mud carp had adaptive reaction to dietary protein content.
【Fund】: 广东省自然科学基金(033102);; 国家科技基础平台建设项目(2005DKA21103)
【CateGory Index】: S917.4
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