稀土对大菱鲆生长和非特异性免疫力的影响  

Effects of Dietary Rare Earth Elements on Growth and Innate Immune Response of Turbot,Scophthalmus maximus

作　　者：崔丽卿[1] 徐玮[1] 汪东风[1] 

机构地区：[1]中国海洋大学食品科学与工程学院,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2011年第7期97-100,共4页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(30972289);山东省自然科学基金项目(ZR2009DM026);"十一五"国家科技支撑计划项目(2008BAD94B09)资助

摘　　要：以初始体质量为(12.2±0.01)g的大菱鲆(Scophthalmus maximus)为实验对象,进行为期56 d的摄食生长实验,在基础饲料中添加240 mg/kg的稀土(Rare earth elements,REE),研究了REE对大菱鲆生长和非特异性免疫力的影响。结果表明:饲料中添加稀土后,大菱鲆的成活率提了8.95%,特定生长率提高了15.79%,增重率提高了26.88%,而饲料系数显著低于对照组(P<0.05);饲料中添加稀土喂养的大菱鲆血液中性粒细胞的吞噬指数和超氧化歧化酶活性高于对照组。同时,饲料中添加稀土后,大菱鲆抵抗迟缓爱德华氏菌感染的能力增强。因此,在饲料中添加REE,能够显著提高大菱鲆的生长和非特异性免疫力。The present study was conducted to investigate the effects of dietary rare earth elements（REE）on growth and innate immune response of turbot,Scophthalmus maximus（initial average weight（12.2±0.01） g） as well as its resistance against Edwardsiella tarda.The results of 8 weeks feeding trial showed that the basal diet supplemented with 240 mg/kgREE increased the survival rate of turbot,the specific growth rate（SGR） increased by 15.79%,and the weight gain rate also increased by 26.88%.Furthermore,the feed efficiency（FE） was significantly（P0.05） lower compared with the control group.The phagocytic index（PI） and the activity of super oxide dismutase（SOD） of blood in fish fed the diet with REE were higher than those fed with the control diet.When the fish was challenged with Edwardsiella tarda,the mortality rate was higher in fish fed with REE.These results suggested that REE added to the diet could enhance growth,innate immunity and disease resistance of turbot.

关 键 词：稀土 大菱鲆 生长 非特异免疫 

分 类 号：S968.1[农业科学—水产养殖]