XU Liang, NING Jiajia, WANG Xuehui, XU Lei, LIU Yu, DU Hong, DU Feiyan. Effect of lipid removal on carbon and nitrogen isotopes of Sthenoeuthis oualaniensis from South China Sea[J]. South China Fisheries Science, 2018, 14(4): 88-93. DOI: 10.3969/j.issn.2095-0780.2018.04.011
Citation: XU Liang, NING Jiajia, WANG Xuehui, XU Lei, LIU Yu, DU Hong, DU Feiyan. Effect of lipid removal on carbon and nitrogen isotopes of Sthenoeuthis oualaniensis from South China Sea[J]. South China Fisheries Science, 2018, 14(4): 88-93. DOI: 10.3969/j.issn.2095-0780.2018.04.011

Effect of lipid removal on carbon and nitrogen isotopes of Sthenoeuthis oualaniensis from South China Sea

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  • Received Date: January 15, 2018
  • Revised Date: March 19, 2018
  • Available Online: December 04, 2018
  • The stable isotopes of carbon and nitrogen are important in evaluating feeding ecology and migration of organisms. Muscle tissues are commonly used as analytical samples, but lipids in muscles with low δ13C values can affect the stable isotopes analysis. To understand the effect of lipid removal on carbon and nitrogen stables isotopes in Sthenoeuthis oualaniensis muscle samples, we analyzed the stable isotopes of S.oualaniensis captured in the South China Sea in April, 2017. In addition, we compared different lipid removal models to get the best fitted model to revise δ13C values in S.oualaniensis muscles. The results show that after lipid removal, both δ13C and δ15N values changed significantly (P<0.01), increasing by 0.85‰ and 0.71‰, respectively. The lipid removal of δ13C values in S.oualaniensis muscles did not change with size and sex (P>0.05). Besides, Model 3 had the lowest Akaike information criterion value (AIC), indicating that it is the best fitted model for revising δ13C values. The results reveal that lipid removal is necessary in analyzing δ13C values in S.oualaniensis muscles, but δ15N values are affected when lipids are removed, so lipid removal is unnessary in δ15N values analysis.
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