delta C-13 and fatty acid composition of mesopelagic fishes in the South China Sea and their influence factors
文献类型： 外文期刊
作者： Wang, Fuqiang 1 ; Wu, Ying 1 ; Cui, Ying 1 ; Chen, Zuozhi 2 ; Li, Zhongyi 3 ; Zhang, Jun 2 ; Zheng, Shan 4 ;
作者机构： 1.East China Normal Univ, State Key Lab Estuarine & Coastal Res, 500 Dongchuan Rd, Shanghai 200062, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou, Guangdong, Peoples R China
3.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao, Shandong, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Jiao Zhou Bay Marine Ecosyst Res Stn, Qingdao, Shandong, Peoples R China
关键词： Mesopelagic fishes; lipids; delta C-13; fatty acids; temperature; South China Sea
期刊名称：CHEMISTRY AND ECOLOGY （ 影响因子：2.244； 五年影响因子：1.933 ）
ISSN： 0275-7540
年卷期： 2019 年 35 卷 9 期
页码：
收录情况： SCI
摘要： Study of the ecology of mesopelagic fishes is central for assessing the active biological pump in the ocean, especially in the mesopelagic layers. The use of delta C-13 and fatty acid analysis can help to analysis the ecology of mesopelagic fishes. Here, we analysed the fatty acid composition of mesopelagic fishes from the continental northern slope of the South China Sea (NSSCS) and compared with nearshore SCS fishes and mesopelagic fishes collected from the Southern Ocean. The mesopelagic fishes had unusually high lipids, which resulted in Delta delta C-13 values exceeding 1 parts per thousand, more than the enrichment factor in the food web. The mesopelagic fishes had higher C18:1n-9/C18:1n-7 and C20:1n-9/ C18:1n-7 ratios compared with other fishes in the SCS, which confirmed that plankton were their main dietary source. The mesopelagic fishes from SCS and Southern Ocean had different ratios of C20:5n-3/C22:6n-3 (EPA/DHA), suggesting geographical locations and diet sources had obvious influence on their fatty acid composition. The SCS mesopelagic fishes had higher C20:4n-6/C22:6n-3 (ARA/DHA) and C20:4n-6/C20:5n-3 (ARA/EPA) ratios than mesopelagic fishes in the Southern Ocean, indicating the influence of physical factors on fatty acid composition. Thus, future studies of the fatty acids in mesopelagic fishes should consider both dietary sources and physical environments.
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