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General Session 3: Biological oceanography & global change |
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Nutritional analysis of Aureococcus anophagefferens
GS3-11-S
Jian Gao* , Research Center for Harmful Algae and Marine Biology, Jinan University, 601 Huangpu Dadao Xi, Guangzhou
Hongpo Dong, Research Center for Harmful Algae and Marine Biology, Jinan University, 601 Huangpu Dadao Xi, Guangzhou
Presenter Email: 517402464@qq.com
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| Large-scale “brown tides” occurred in early summer for six consecutive years from 2009 to 2015 in sea area near Qinhuangdao of the Bohai Sea, the causative species of the bloom was identified as Aureococcus anophagefferens, which had significant negative impacts on the scallop culture industry. Lipid content, amino acid content and fatty acid content of Aureococcus anophagefferens were analyzed to determine whether the lack of nutrition was the leading factor which results in the inhibitory effect of brown tide on bivalve suspension-feeding. Oil contents were measured by Soxhlet extraction and the compositions and content of fatty acid were analyzed by gas chromatography-mass spectrometry(GC-MS). Compositions and content of amino acid were analyzed by automatic amino acid analyzer. The total lipid contents were 21.99% of dry weight, amino acid contents were 30.78% of dry weight, in which the essential amino acid contents were 12.62%, the fatty acid contents were 9.30% of dry weiget. Four types of unsaturated fatty acid were detected and the content of them were up to 25.20% of the total fatty acid contents. In conclusion, Aureococcus anophagefferens is rich in nutrition, so the hypothesis that lack of nutrition was the leading factor which results in the inhibitory effect on bivalve suspension-feeding is not valid. |
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