不同食物组分对大红海参生长和脂肪酸组成的影响

为开发大红海参人工养殖技术,采用海带粉、鼠尾藻粉和仿刺参复合饲料3种常见饵料投饲大红海参,分析各组大红海参的生长及体壁脂肪酸组成的差异,从营养组成角度筛选适于大红海参人工养殖的饵料成分.试验结果显示,不同投饲组大红海参体壁脂肪酸组成具有显著差异(P<0.05),大红海参体壁n-6和n-3不饱和脂肪酸的比例与饵料中亚油酸...

Effects of Different Dietary Ingredients on Growth and Fatty Acid Composition of Red Giant Sea Cucumber

Effects of three dietary ingredients(i.e.kelp Laminaria japonica powder,Sargassum thunbergii powder and commercial feed for sea cucumber Apostichopus japonicas)on growth rate and fatty acid(FA)of giant red sea cucumber Parastichopus californicu were evaluated,to screen the optimal diet ingredients for giant red sea cucumber.The results showed that FA compositions in giant red sea cucumber were significantly different among three dietary groups(P<0.05).The contents of n-6 and n-3 polyunsaturated fatty acid(PUFA)groups in giant red sea cucumber were positively correlated with dietary contents of 18:2n-6 and 18:3n-6,indicating that giant red sea cucumber had the ability to biosynthesize long chain n-6 and n-3 PUFAs.Giant red sea cucumber fed kelp displayed the highest growth rate and PUFA content among three dietary groups(P<0.05).However,giant red sea cucumber fed commercial feed showed the highest n-3 fatty acid content and n-3 PUFAs/n-6 PUFAs(P<0.05).From the aspect of specific growth rate and fatty acid composition,kelp is more suitable than S.thunbergii to feed giant red sea cucumber.In conclusion,the mixed feed containing kelp and higher n-3 fatty acid is supposed to provide more balanced nutrition for giant red sea cucumber.