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Article

Species Composition and Distribution of the Catches collected by a Bottom Trawl in the Southwestern Sea of Jeju Island in Summer 2020

여름 제주도 남서부해역 저층 해양생물 종조성과 분포

DAE-JIN KIM1
,
HO YOUNG SOH2
,
SEONGGIL GO3
,
KYUNGHWAN LEE4*
김 대진1
,
서 호영2
,
고 성길3
,
이 경환4*
1Professor, Training Ship Administrative Center, College of Fisheries and Ocean Sciences, Chonnam National University, Yeosu 59626, Korea
2Professor, Department of Ocean Integrated Science, College of Fisheries and Ocean Sciences, Chonnam National University, Yeosu 59626, Korea
3Post Doctoral Scientist, Tropical & Subtropical Research Center, Korea Institute of Ocean Science and Technology, Jeju 63349, Korea
4Postdoctoral Researcher, Fishery Resource Management Research Institute based on ICT, Chonnam National University, Yeosu 59626, Korea
1전남대학교 수산해양대학 선박실습센터 교수
2전남대학교 수산해양대학 해양융합과학과 교수
3한국해양과학기술원 제주연구소 연수연구원
4전남대학교 ICT수산자원관리연구소 박사후연구원
*Corresponding Author
31 August 2025. pp. 199-214
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Abstract

To document the species composition and distribution of marine organisms in the southwestern sea of Jeju Island of Korea, a bottom trawl survey was conducted in July and August 2020. The catches were composed total 37 species, 1,026 individuals and 180,539 g in biomass. The Lophius litulon was the most dominant species in the southwestern sea of Jeju Island based on the catch biomass. The species composition could be classified into three groups resulting from correspondence analysis (CA). Group 1 (St1, St3, St5), the shallowest depth area, was dominated by Lophius litulon and Liparis tanakae. Group 2 (St2), the middle depth area, was dominated by Zenopsis nebulosi, Trachurus japonicus, and Solenocera melantho. Group 3 (St4), the deepest depth area, was dominated by Lophius litulon, Zeus faber and Loligo edulis. We concluded that in the southwestern bottom area off Jeju Island, the total biomass of marine organisms decreases with decreasing latitude and increasing depth, and that coastal areas at approximately 90 m depth exhibit higher biomass compared to offshore areas (≥100 m).

Keywords
Southwestern sea of Jeju Island
Bottom trawl
Species distribution
Species composition
Dominant species

여름 제주도 남서부 해역 연근해 저층 해양생물 종조성과 분포 특성을 평가하기 위해 2020년 7월과 8월 저층 트롤을 이용하여 어획 시험 조사를 수행하였다. 어획된 개체는 총 37종, 1,026개체, 180,539 g의 생물량이 어획되었다. 어획된 어종 중 생물량을 기준으로 황아귀(Lophius litulon)가 제주도 남서부 해역에서 가장 우점하는 종으로 나타났다. 정점별 종 구성은 대응분석(Correspondence Analysis, CA)을 통해 세 그룹으로 구분되었다. 수심이 가장 얕은 그룹 1(St1, St3, St5)은 황아귀와 꼼치(Liparis tanakae)가 우점하였다. 중간 수심 해역인 그룹 2(St2)는 민달고기(Zenopsis nebulosi), 전갱이(Trachurus japonicus), 대롱수염새우(Solenocera melantho)가 우점하는 것으로 나타났으며, 수심이 가장 깊은 그룹 3(St4)은 황아귀, 달고기(Zeus faber), 창꼴뚜기(Loligo edulis)가 우점하는 것으로 나타났다. 또한, 생태학지수를 통해 제주도 서남부 저층 해역의 해양생물은 위도가 낮고 수심이 깊을수록 총 생물량은 감소하며 외해(≥100 m) 보다 수심 90 m내외의 연안에서 생물량이 더 높은 것으로 평가할 수 있다.

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Information
  • Publisher :The Korean Society of Oceanography
  • Publisher(Ko) :한국해양학회
  • Journal Title :The Sea Journal of the Korean Society of Oceanography
  • Journal Title(Ko) :한국해양학회지 바다
  • Volume : 30
  • No :3
  • Pages :199-214
  • Received Date : 2025-06-23
  • Revised Date : 2025-08-13
  • Accepted Date : 2025-08-14
  • DOI :https://doi.org/10.7850/jkso.2025.30.3.199
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