Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Diet of Chaetognaths Sagitta crassa and S. nagae in the Yellow Sea Inferred from Gut Content and Fatty Acid Analyses

위 내용물 및 지방산 구성을 통한 황해 모악류(Sagitta crassa와 S. nagae)의 먹이 섭식 특성

  • Yoon, Hyunjin (Deep-sea and Seabed Mineral Resources Research Center, KIOST) ;
  • Ko, Ah-Ra (Research Institute of Oceanography, Seoul National University) ;
  • Kang, Jung-Hoon (South Sea Environment Research Center, KIOST) ;
  • Choi, Joong Ki (Department of Oceanography, College of Natural Sciences, Inha University) ;
  • Ju, Se-Jong (Deep-sea and Seabed Mineral Resources Research Center, KIOST)
  • 윤현진 (한국해양과학기술원 심해저광물자원연구센터) ;
  • 고아라 (서울대학교 해양연구소) ;
  • 강정훈 (한국해양과학기술원 남해특성연구센터) ;
  • 최중기 (인하대학교 자연과학대학 해양과학과) ;
  • 주세종 (한국해양과학기술원 심해저광물자원연구센터)
  • Received : 2016.01.12
  • Accepted : 2016.03.09
  • Published : 2016.03.30
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Abstract

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.

Keywords

References

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