摘要
选用360尾初始体重为(5.35±0.02)g的奥尼罗非鱼(Oreochromis aureus ♂×O reochromis niloticus♀)幼鱼,随机分配在12个水族箱中(容积为300 L),每箱放30尾鱼。试验分为3组,投喂3种不同饲料(分别添加质量分数为0、0.0125%、0.025%的溶血卵磷脂,记为对照组、A组、B组),每组设4个重复。通过8周的生长试验,评价饲料中添加溶血卵磷脂对罗非鱼生长、鱼体成分、血液生化指标的影响。结果表明:与对照组相比,A组和B组罗非鱼幼鱼的相对增重率和特定生长率显著升高(P<0.05),B组幼鱼的饲料系数及蛋白质效率也有所改善;A组和B组鱼体中的水分、粗蛋白、粗脂肪和粗灰分以及肝体比和脂体比与对照组无显著差异(P>0.05),但B组的脏体比显著提高(P<0.05);除B组幼鱼血液中胆固醇的含量显著提高外,各试验组幼鱼血液中的甘油三脂、高密度脂蛋白、低密度脂蛋白及A组幼鱼的胆固醇含量与对照组间均无显著差异(P>0.05)。这表明饲料中添加一定量的溶血卵磷脂后,可提高罗非鱼幼鱼的生长性能,并能提高幼鱼对脂肪和其它营养物质的利用率。
An 8-week feeding trial was conducted to study the effects of lysolecithin on growth performance,body composition and hematological indices in hybrid tilapia（Oreochromis aureus ♂×Oreochromis niloticus ♀）.A total of 360 tilapia with an average body weight of（5.35±0.02）g was randomly allocated into 12 tanks at a rate of 30 per tank and fed 2 experimental diets containing 0.0125%（A）,and 0.025%（B） lysolecithin and 1 basal diet as the control.There were significantly higher relative weight gain ratio and specific growth rate in group A and B（P〈0.05） than those in the the control group,and feed coefficient and protein efficiency ratio were improved in group B.Supplementation of lysolecithin in the diets did not significantly affect the fish body protein,lipid,ash,and moisture contents and hepatosomatic index and intraperitoneal fat ratio,while viscerosomatic index increased significantly（P〈0.05） compared with the control group.The concentration of the blood cholesterol in group B was found to be significantly higher than that in the control group and group A.However,the levels of blood triglyceride,high-density lipoprotein and low-density lipoprotein were not significantly affected by the supplementation of dietary lysolecithin.In conclusion,the growth performance and nutritional utilization rate were improved by supplementation of dietary lysolecithin in tilapia,without significant difference in the body composition.
出处
《大连水产学院学报》
CSCD
北大核心
2010年第2期143-146,共4页
Journal of Dalian Fisheries University
基金
广东省农业攻关项目(2008A020100006)
国家"十一五"农业行业专项资助(nyhyzx07-044)
关键词
溶血卵磷脂
罗非鱼
生长性能
饲料利用
lysolecithin
hybrid tilapia
growth performance
feed utilization
