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Diet of Chaetognaths Sagitta crassa and S. nagae in the Yellow Sea Inferred from Gut Content and Fatty Acid Analyses
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  • Journal title : Ocean and Polar Research
  • Volume 38, Issue 1,  2016, pp.35-46
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2016.38.1.035
 Title & Authors
Diet of Chaetognaths Sagitta crassa and S. nagae in the Yellow Sea Inferred from Gut Content and Fatty Acid Analyses
Yoon, Hyunjin; Ko, Ah-Ra; Kang, Jung-Hoon; Choi, Joong Ki; Ju, Se-Jong;
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To understand the diet of chaetognaths, the gut content and fatty acid trophic makers (FATMs) of Sagitta crassa and S. nagae, which are the most predominant species of chaetognath in the Yellow Sea, were analyzed. Gut contents of the two species examined by microscopic analysis revealed that copepods are the major components of the diet (> 70% of gut contents) and there was no significant changes in the gut contents of two species collected in spring and summer season. Although 16:0, 20:5(n-3) (Eicosapentaenoic acid) and 22:6(n-3) (Docosahexanoic acid), which are known as phytoplankton FA markers, were the most dominant among the fatty acids in both chaetognath species, the detection of copepod FA markers, 20:1(n-9) (Gadoleic acid) and 22:1(n-11) (Cetoleic acid), provided evidence that their food sources include copepods. These results suggest that S. crassa and S. nagae are carnivores and mainly feed on copepods in the Yellow Sea.
chaetognath;diet;gut content;fatty acid;Yellow Sea;
 Cited by
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