2个脂肪水平下添加肉碱对军曹鱼生长及体组成的影响

Effect of Dietary L-Carnitine Supplements on Growth and Body Composition of Juvenile Cobia(Rachycentron canadum)

设计一个2×2双因子试验,经过8周的养殖,试验结果表明:肉碱对初始重(9.67±0.14)g的军曹鱼幼鱼的生长和FCR值没有产生显著的影响,肉碱处理对全鱼的体脂肪含量产生了极显著的影响(P>0.05),在2个脂肪水平下添加1 500 mg/kg肉碱既不能促进军曹鱼的生长,也不能改善饲料利用状况;在14%脂肪组,添加肉碱影响了组织的脂肪代谢,改变了肝脏中总脂肪的脂肪酸组成,显著降低了体脂肪和肝脂肪含量,但这种作用在6%脂肪组是不明显的。

A 2×2 factorial design was utilized to test the efficacy of dietary L-carnitine at 0 and 1 500 mg/kg diet at lipid levels of 6% and 14%. Juvenile cobia initially averaging （9.67±0.14） g/fish were cultured in a flowing sea water system and fed twice daily at a rate approaching apparent satiation. At the end of the 8- week feeding triM, carnitine administration did not cause any effect on growth and feed efficiency under the experiment conditions. At 14% dietary lipid level, carnitine administration increased fatty acid oxidation and altered liver fatty acids profile, but it wasn＇t obvious at 6% dietary lipid level.