火腿许水蚤对牙鲆仔稚鱼成活、生长及脂肪酸组成的影响

在分析火腿许水蚤、卤虫无节幼体及轮虫这3种饵料生物脂肪酸组成的基础上,研究它们对牙鲆仔稚鱼存活、生长及脂肪酸组成的影响。结果表明:火腿许水蚤体内3种高度不饱和脂肪酸(ARA,EPA,DHA)总量为34.18%,明显高于其它2种动物的含量(卤虫无节幼体4.67%;小球藻强化轮虫9.39%)。投喂火腿许水蚤的仔鱼成活率极显著高于投喂卤虫无节幼体的仔鱼,与投喂混合饵料(卤虫无节幼体和火腿许水蚤按比例混合)的仔鱼存活率差异较显著;其全长增长倍数和增重倍数极显著高于投喂卤虫无节幼体和混合饵料的仔鱼。投喂火腿许水蚤的稚鱼成活率显著高于投喂卤虫无节幼体的稚鱼,与投喂混合饵料的稚鱼存活率差异不显著;其全长增长倍数和增重倍数极显著高于投喂卤虫无节幼体和混合饵料的稚鱼。投火腿许水蚤的仔稚鱼体内ARA、EPA、DHA的含量明显高于投喂混合饵料的和投喂卤虫无节幼体的仔稚鱼。

Study on the Growth, Survival and Fatty Acids Composition of Larvae and Juvenile of Paralichthys olivaceus Raised with Schmackeria poplesia (Copepoda: Calanoida)

Fatty acid composition in three kinds of planktonic food animals(Schmackeria poplesia;Brachionus plicatilis;Artemia sp.) were measured quantitatively by means of gas chromatographic technique.The results showed that total content of the three HUFAs(ARA,EPA and DHA) in S.poplesia were significantly higher than that of the others(P<0.01).The three living foods were chosen to raise the larvae and juveniles of Paralichthys olivaceus respectively for 15 and 10 days,and then the growth rate,survival rate and fatty acids composition of the larvae and juveniles were determined.The results showed that the larvae and juveniles fed with copepods(S.poplesia) had significantly higher growth rate than those fed the others(P<0.01).The survival rate of the larvae fed with copepods was significantly higher than that of the others(P<0.01),and the survival rate of the juveniles fed with copepods was higher than that of the one raising by Artemia nauplii(P<0.05).The contents of the three important HUFAs(ARA,EPA and DHA) in larvae and juvenile of P.olivaceus fed with S.poplesia were higher than the others.