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WANG Yanqing, LI Chaolun, LIU Mengtan, JIN Xin. Lipids and fatty acids in Calanus sinicus during oversummering in the southern Yellow Sea[J]. Journal of Oceanology and Limnology, 2017, 35(4): 874-882 |
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Lipids and fatty acids in Calanus sinicus during oversummering in the southern Yellow Sea |
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| WANG Yanqing1,2,3, LI Chaolun1,2,3, LIU Mengtan1,4, JIN Xin1 |
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1 Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;
4 Jiaozhou Bay Marine Ecosystem Research Station, Chinese Ecosystem Research Network, Qingdao 266071, China |
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| Abstract: |
| Over-summering is a crucial period for Calanus sinicus in the southern Yellow Sea, where it is a key member of the zooplankton community. Lipids play an important role in copepod diapause, which is part of their over-summering strategy. We investigated how different fatty acids and lipid classes, including wax esters, changed during over-summering of C. sinicus during three cruises in June and August 2011 and November 2010, corresponding to the pre-, during and post-diapause periods, respectively. Large amounts of lipids were accumulated, mainly wax esters as previously found in C. finmarchicus during its diapause, and most of the storage lipids were used during over-summering. Wax ester polyunsaturated fatty acids (PUFAs) showed the most variation of the fatty acids (FAs), while the percentage composition of FAs in polar lipids was relatively stable. Selective use of wax ester PUFAs has already been shown to play important roles in the winter diapause of Calanus species in other regions, and our FA results show that this is the case for the Yellow Sea Cold Bottom Water (YSCBW) population that diapauses in summer. |
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| Key words:
Calanus sinicus|lipid|wax ester|polar lipid|polyunsaturated fatty acids (PUFAs)
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| Received: 2016-01-17 Revised: 2016-03-21 |
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