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《Journal of Shanghai Fisheries University》 2001-01
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Influence of different feeding conditions and nutritional enrichment on total lipid and fatty acid composition of Daphnia magna

HUANG Xian qing, WANG Wu, CHENG Yong xu ( Fisheries College, SFU, Shanghai 200090, China)  
Total lipid and fatty acid composition of Daphnia magna change remarkably with difference of food and implement of nutritional enrichment. The number of total lipid in the yeast group is 2.5% and higher distinctly than those in the seawater Chlorella spp. group (1.65%) and the organic manure group (1.5%). After enriched with fish oil or cultured twice for the seawater Chlorella spp., the number of total lipid in the yeast group increases obviously. Among these three groups, MUFA concentration in the yeast group is the highest of 55%, and they are mainly C 16:1ω7 (22%) and C 18:1ω9 (23%) ,and yet PUFA concentration is the lowest, among them EPA concentration is 2.7% and DHA 0.8%; Compared with the yeast group the MUFA concentration of the seawater Chlorella spp. group and the organic manure group decreases remarkably, PUFA concentration increases evidently, they are all 30%-33% or so, EPA concentration of the seawater Chlorella spp. group 14% is the highest among three groups, followed by the organic manure group(5.9%) and the yeast group (2.7%); DHA concentration of the organic manure group is the highest of 11.7%,and the yeast group and the seawater Chlorella spp. group are all very low of 0.7%-0.8%. After enriched with fish oil, the MUFA concentration of the yeast group decreases clearly, the PUFA concentration of that increases remarkably, EPA increases from 2.7% to 10%, DHA increases from 0.8% to 7%; After cultured twice for the seawater Chlorella spp., the MUFA concentration of the yeast group decreases markedly, PUFA increases correspondingly, EPA increases from 2.7% to 9.7%, and there is no change in DHA.
【Fund】： 国家自然科学基金!资助项目 (3990 0 112 2 )
【CateGory Index】： S968.2
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