Immune response,stress resistance and bacterial challenge in juvenile rainbow trouts Oncorhynchus mykiss fed diets containing chitosan-oligosaccharides

查看全文 作　　者：Lin [1]LUO;Xuefeng [2]CAI;Chuan [3]HE;Min [4]XUE;Xiufeng [4]WU;Haining [1]CAO

机构地区：[1]Beijing Fisheries Research Institute, Beijing 100068, China;[2]Hibio Group, Xi'an, Shaanxi Province, 710068, China;[3]Extension Station of Aquieulture Technology, Beijing Municipal Bureau of Agriculture, Beijing 100068, China;[4]Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China

出　　处：《Current Zoology》索引2009年第55卷第6期,共7页

基　　金：Financial support was provided by 11th 5-year National Key Technologies R & D Program Project No.2006BAD12B06,2006BAD12B08 摘　　要：Effects of dietary supplementation of chitosan-oligosaccharides(COS)on the growth performance,immune response,stress resistance,and disease resistance of juvenile rainbow trout Oncorhynchus mykiss were studied.Four experimental diets containing 0,20,40,or 60 mg/kg COS(COS0,COS20,COS40,and COS60,respectively)were fed to juvenile rainbow trout(initial weight=5.2±0.3 g)for 8 weeks.By the end of the feeding trial,representative groups of fish from each dietary treatment were challenged with stressor(30 sec air exposure)and pathogen exposure(intraperitoneal injection with Aeromonas hydrophila).Results showed that supplementation of COS in diets did not affect production performance and body composition of rainbow trout.However,fish fed the COS40 diet demonstrated improved phagocytic activities,respiratory burst activities and decreased serum cortisol level.Additionally,survival following A.hydrophila challenge was significant higher among fish fed the COS-supplemented feeds,although there was no difference based on the level of supplementation.The present study suggests that COS can be used as an immuno-stimulant in rainbow trout feeds. 关键词：免疫反应虹鳟鱼壳聚糖抗逆性低聚糖少年细菌饲喂

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Immune response,stress resistance and bacterial challenge in juvenile rainbow trouts Oncorhynchus mykiss fed diets containing chitosan-oligosaccharides

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