Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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A study on the variation of the Korean marine ecosystem through biodiversity attributes

생물다양성 특성 분석을 통한 우리나라 주변 해양생태계 변화 연구

  • Jong Hee LEE (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Young Il SEO (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Sang Chul YOON (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Heejoong KANG (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Ji-Hoon CHOI (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Min-Je CHOI (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • Jinwoo GIM (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science)
  • 이종희 (국립수산과학원 연근해자원과) ;
  • 서영일 (국립수산과학원 연근해자원과) ;
  • 윤상철 (국립수산과학원 연근해자원과) ;
  • 강희중 (국립수산과학원 연근해자원과) ;
  • 최지훈 (국립수산과학원 연근해자원과) ;
  • 최민제 (국립수산과학원 연근해자원과) ;
  • 김진우 (국립수산과학원 연근해자원과)
  • Received : 2023.10.13
  • Accepted : 2023.11.22
  • Published : 2023.11.30
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Abstract

In the last five decades, there has been a consistent decline in the total catch of fisheries in the Korean jurisdiction since the peak in 1986. The decline in catch slowed and slightly rebounded in the 2000s, but changed back to a decline in the 2010s. As indicators that can identify changes in the marine ecosystem, trophic level (TL), biodiversity index (H'), and the ratio between pelagic fish and demersal fish (P/D) were analyzed by each local marine ecosystem. There were some different changes in each local marine ecosystem, but the mean TL and H' decreased and P/D increased in general in Korean waters. Demersal fish, which were dominant in the 1970s and 1980s, declined, and small pelagic fish and cephalopods have dominantly changed since the 1990s. However, these changes are not simple, and they are fluctuating in complex ways relating to each marine ecosystem and the timing. It is believed that changes in marine ecosystems in Korean waters are likely caused by a combination of fisheries and climate change. The ecosystem indicators reflected a change in the total catch, a sharp drop in catch of demersal fish, and increasing catch of pelagic fish since the mid-1980s.

Keywords

Acknowledgement

본 연구는 국립수산과학원 2023년도 수산시험연구사업 연근해 어업자원 평가 및 관리 연구(R2023002)의 지원을 받아 수행되었습니다.

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