摘要
研究了饲料脂肪水平对吉富罗非鱼(Genetic Improvement of Farmed Tilapia,GIFT)的部分形体指标、肌肉肝脏及腹腔脂肪组织的脂肪沉积及脂肪酸组成的影响,同时探讨了鱼体对饲料脂肪酸的吸收利用能力。实验设置饲料脂肪水平分别为1.73%、3.71%、5.69%、7.67%、9.64%、16.55%共6个梯度组,每组3个重复,饲养90d。结果显示:5.69%、7.67%及9.64%脂肪组吉富罗非鱼肥满度较高;1.73%和16.55%脂肪组的肝体指数显著高于其他实验组(P<0.05);除了1.73%脂肪组,其他各组中饲料脂肪水平越高,鱼体的脏体指数越高。7.67%脂肪组吉富罗非鱼肌肉脂肪含量显著高于3.71%组(P<0.05),同时显著低于16.55%组(P<0.05),但是其肝脏中脂肪含量与其他各组差异均不显著(P>0.05);饲料脂肪水平越高,鱼体的脂肪含量越高,同时不饱和脂肪酸在总脂肪酸中的比例越高。结果表明,饲料脂肪水平影响吉富罗非鱼的部分形体指标,尤其对肝脏形态的影响较为明显。饲料中过多的脂肪容易在肌肉和肝脏组织中沉积,同时鱼体的脂肪含量和脂肪酸组成能够反映饲料的脂肪水平和脂肪酸组成。本研究旨在为饲料脂肪水平的合理设置及脂肪营养对脂肪代谢的调控提供参考。
The study mainly focused on the effects of dietary lipid levels on partial physique indices,the fat deposition and fatty acid profiles of muscle,liver and adipose tissue of peritoneal cavity in the juvenile fish of GIFT （Genetically Improved Farmed Tilapia,Oreochromis niloticus）,and investigated its utilization capabilities of the fatty acid in diets.Triplicate groups of fish were fed for 90 days with the experimental diets formulated with increasing lipid levels （lipid levels group of 1.73%,3.71%,5.69%,7.67%,9.64% and 16.55%） using fish oil as the lipid source.Result showed condition factor of the fish in the 5.69%,7.67% and 9.64% groups at higher values contrasted to other groups.The hepatosomatic index of the 1.73% and 16.55% group were significantly higher than those other groups （P0.05）.Fat content of muscle in 7.67% group were significantly higher than 3.71% group （P0.05） and significantly lower than 16.55% group of the fish （P0.05）.It presented an uptrend on fat contents of muscle and liver and a little influence on fat contents of adipose tissue of peritoneal cavity when dietary lipid levels raising.The higher dietary lipid level,the more body fat deposition and the higher n-3 unsaturated fatty acids proportion of tissue total fatty acids.Results indicated that the partial fish physique indices were influenced by dietary lipid levels,especially hepatosomatic index.While the fish was fed an overabundance lipid diet,the fat was easy to be accumulated in the tissues of muscle and liver.The fat contents and fatty acid profiles of fish reflected the dietary lipid level and fatty acid profiles.
出处
《中国水产科学》
CAS
CSCD
北大核心
2011年第2期338-349,共12页
Journal of Fishery Sciences of China
基金
农业部水生动物遗传育种和养殖生物学重点开放实验室重点开放课题(BZ2007-06)
江苏省2008年度省高校自然科学基础研究项目(08KJD240003)
作者简介
作者简介：韩光明（1985-），男，硕士，研究方向水产动物营养与生化．E-mail：gmhan2006@126．com
通讯作者：王爱民，副教授．E-mail：blueseawam@ycit．cn
