养殖银鲳幼鱼体脂含量及脂肪酸组成的变化

Changes of body lipid content and fatty acid profile in cultured juvenile silver pomfret,Pampus argenteus

分析了室内水泥池人工养殖银鲳(Pampus argenteus)幼鱼在不同生长阶段(2006年6-9月)的体脂含量和脂肪酸组成的变化。结果显示,人工养殖银鲳在进入幼鱼阶段初期,其体脂含量相对较低,随幼鱼的生长体脂含量逐渐升高,自7月底至9月银鲳幼鱼体脂含量一直处于一个较为稳定的水平,且显著高于6月至7月中旬期间的体脂含量(P<0.05)。在进入幼鱼阶段的初期(6月),鱼体饱和脂肪酸(SFA)含量相对较低,显著低于7至9月间的SFA含量(P<0.05)。幼鱼初期时的多不饱和脂肪(PUFA)含量及高度不饱和脂肪酸(HUFA)的含量处于较高的水平,但随着幼鱼的生长,鱼体PUFA与HUFA含量呈现降低的趋势,至8月份时鱼体二十碳五烯酸(EPA)与花生四烯酸(ARA)的含量均显著低于幼鱼初期时的水平(P<0.05)。但二十二碳六烯酸(DHA)的含量在试验期间无明显的变化(P>0.05)。

Changes of body lipid content and fatty acid profile in cultured juvenile silver pomfret （Pampus argenteus） were analyzed. The results showed that body lipid content in the initial of juvenile stage was relatively low, and increased with the growth of the juvenile. The lipid content from July 30^th to September 15^th was significantly higher than that from June 25^th to July 15^th（P 〈 0. 05 ）. In the initial of juvenile stage （in June）, the saturated fatty acid （SFA） content in body was relatively low, and significantly lower than that from July to September （ P 〈 0.05 ）. The poly-unsaturated fatty acid （ PUFA ） and highly unsaturated fatty acid （HUFA） contents in the initial of juvenile stage were relatively high, and with the growth of the juvenile, the PUFA and HUFA contents reduced. The EPA and ARA contents from August to September were significantly lower than those in June. However, the DHA content did not significantly change from June to September （P 〉0.05）.