한국환경과학회지 (Journal of Environmental Science International)

  • 제31권10호
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  • Pages.861-868
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  • 2022
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  • 1225-4517(pISSN)
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  • 2287-3503(eISSN)
한국환경과학회 (The Korean Environmental Sciences Society)
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강릉 남대천에서 소상하는 연어(Chum salmon, Oncorhynchus keta) 분포와 행동 특성

Distribution and Behavioral Characteristics of Chum Salmon (Oncorhynchus keta) in Namdae Stream, Korea

  • 김범식 (강릉원주대학교 해양생태환경학과) ;
  • 정용우 (강릉원주대학교 해양생태환경학과) ;
  • 김우보 (강릉원주대학교 해양생태환경학과) ;
  • 홍성익 (바다생태리서치) ;
  • 이충일 (강릉원주대학교 해양생태환경학과)
  • Kim, Beom-Sik (Department of Marine Ecology and Environment, Gangneung-Wonju National University) ;
  • Jung, Yong-Woo (Department of Marine Ecology and Environment, Gangneung-Wonju National University) ;
  • Kim, Woobo (Department of Marine Ecology and Environment, Gangneung-Wonju National University) ;
  • Hong, Sung-Eic (Bada Ecology Research) ;
  • Lee, Chung Il (Department of Marine Ecology and Environment, Gangneung-Wonju National University)
  • 투고 : 2022.09.07
  • 심사 : 2022.10.04
  • 발행 : 2022.10.31
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초록

The Namdae stream in Gangneung-si is one of the rivers where salmon stock is mainly maintained by natural spawning rather than artificial seedlings. There are structures including weir, and fish distribution and movement characteristics can be different by these structures. In this study, we investigated the distribution and behavioral characteristics of salmon by sighting survey within 12 km immediately upstream of the river mouth between October 2021 and February 2022. As a result, salmon distributed within 9 km from rivermouth. There were more salmon in the lower reaches of Doosan weir than in the upper reaches of that. The main spawning ground for salmon was between 7-9 km from rivermouth and around the lower part of Doosan weir. Salmon behaved for spawning in the gravel-bed area and undercut slope of the mainstream, such as mating, digging the riverbed, and competition among males. Salmon moved more slowly in the gravel-bed area than sand-bed area. Doosan weir hinders the spawning migration of salmon by frequent flow changes and terraced fishway. This study provides primary information to understand the ecological changes of salmon by environmental changes in the Namdae stream.

키워드

과제정보

이 논문은 해양수산부 재원으로 해양수산과학기술진흥원의 지원을 받아 수행된 연구(강원씨그랜트, 기후변화에 따른 해양생태계 반응·변화 연구(20220558), 기후변화에 따른 수산자원생물의 종 다양성 변화 진단과 미래 전망(20220214))에 의해 연구되었습니다.

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