饲料中添加二苯乙烯苷对斑点叉尾鮰生长和体色的影响  

Effects of dietary stilbene glucoside on growth and body color of Ictalurus punctatus

作　　者：张恒[1] 贺国龙[1] 刘立鹤[1] 王辅臣[1] 张侃 舒友松[3] 

机构地区：[1]武汉工业学院动物科学与营养工程学院,武汉430023 [2]湖北省饲料工程技术研究中心,武汉430023 [3]武汉工业学院动物营养与饲料科学湖北省重点实验室,武汉430023

出　　处：《淡水渔业》2012年第1期58-62,共5页Freshwater Fisheries

基　　金：湖北省教育厅科研计划项目(Q20081803)

摘　　要：在饲料中分别添加0、0.33%、0.67%、1.33%和2.67%的二苯乙烯苷(THSG)制成5种等氮等能试验饲料饲喂(15±0.5)g斑点叉尾鮰(Ictalurus punctatus)42 d,研究THSG对其生长和体色的影响。结果表明。饲料中添加THSG对斑点叉尾鮰增重率和存活率均无显著影响,仅在添加量为2.67%时,试验组的饵料系数显著高于对照组(P<0.05);然而,随着添加量的增加,鮰皮肤和血液酪氨酸酶活力、皮肤黑色素含量和黑色素分布量均有提高,其中0.33%和0.67%组皮肤中酪氨酸酶活力分别为10.4 U和10.7 U,显著高于对照组的7.86 U;黑色素分布量分别为8.16%和9.38%,显著高于对照组的5.01%(P<0.05)。A 42 d feeding-trial was conducted to evaluate the effects of sfilbene glucoside （tetrahydroxystilbene glucoside, THSG ） on the growth and body color performance of Ictalurus punctatus. Five isonitrigenous diets were formulated to contain 36. 6% protein and 7.3% lipid. THSG was added at four inclusion levels of 0. 33% , 0.67%, 1.33% and 2. 67% （diets A - D）. The control diet didn＇ t contain THSG （diet Ctr）. Weight gain （WG） , Survival and feed conversion ratio（FCR） were not significantly affected when the THSG added except FCR, which presented statistical significance in diet D; In di- ets A - D, tyrosinase activity in blood and skin, melanin content and distribution in the skin were higher than the diet Ctr, and tyrosinase activity in skin of diet A and diet B is 10.4 ug/cm2 and 10.6 ug/em2 respectively , melanin distribution is 8. 16% and 9.38% respectively, which were significantly higher than that of 7.86 ug/em2 and 5.01% in control（ P 〈 0.05 ）. These results indicate that adding THSG to Channel catfish feed has obvious influence on body color and without ad- verse effect on growth performance. Based on the results of WG, FCR, survival, tyrosinase activity in blood and skin, melanin content and distribution, it was feasible to improve the body color by dietary stilbene alucoside.

关 键 词：斑点叉尾鮰(Ictalurus punctatus) 二苯乙烯苷 体色 酪氨酸酶活力 黑色素 

分 类 号：S963.735[农业科学—水产养殖]