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

• Published in: Ocean and polar research Vol. 38; no. 1; pp. 35 - 46
• Main Authors: 윤현진, 고아라, 강정훈, 최중기, 주세종, Yoon, Hyunjin, Ko, Ah-Ra, Kang, Jung-Hoon, Choi, Joong Ki, Ju, Se-Jong
• Format: Journal Article
• Language: Korean
• Published: 한국해양과학기술원 01.03.2016
• Subjects: 해양학; fatty acid; diet; gut content; chaetognath; Yellow Sea
• ISSN: 1598-141X; 2234-7313
• DOI: 10.4217/OPR.2016.38.1.035

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.