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연곡천 하류에서 소상하는 연어(Chum salmon, Oncorhynchus keta)의 이동특성

Behavior Patterns during Upstream Migration of Chum Salmon (Oncorhynchus Keta) in the Lower Reaches of Yeon-gok Stream in Eastern Korea

한국환경과학회지 2020년 29권 9호 p.885 ~ 905
김범식, 정용우, 정해근, 박주면, 이철호, 이충일,
소속 상세정보
김범식 ( Kim Beom-Sik ) - Gangneung-Wonju National University Department of Marine Bioscience
정용우 ( Jung Yong-Woo ) - Gangneung-Wonju National University Department of Marine Bioscience
정해근 ( Jung Hae-Kun ) - National Institute of Fisheries Science East Sea Fisheries Research Institute
박주면 ( Park Joo-Myun ) - Korea Institute of Ocean Science and Technology East Sea Research Institute
이철호 ( Lee Cheul-Ho ) - Gangneung-Wonju National University Industry Academy Cooperation Group
이충일 ( Lee Chung-Il ) - Gangneung-Wonju National University Department of Marine Bioscience

Abstract


This study described the characteristics of the upstream migration of salmon (Chum salmon, Oncorhynchus keta) along Yeon-gok Stream in the eastern coastal region of Korea from October 24 to November 9, 2018 using radio tag and data storage tag loggers for the detection of the locations of tagged salmon and measurement of water temperature. Tracking experiments were conducted and classified into four types (case 1 to case 4) depending on the release time and the number of salmon tracked. Experiments from case 1 to case 3 were classified depending on the number of salmon tracked into cases in which a single tagged salmon was tracked (case 1), a pair of tagged salmon was tracked (case 2), and salmon were tracked by different sex ratios (case 3). Experiments from cases 1 to 3 were conducted between 10 AM and 1 PM, and case 4 was conducted after 3:30 PM. Salmon moved and spawned in the downstream region of the Yeon-gok, where water temperature is higher than in other rivers and salmon return in Canada, Russia, Japan, and the U.S.A. Most of the radio-tagged salmon swam in deep and shaded areas during the day but actively moved upstream close to sunset, regardless of the release time. Females showed relatively more active movements than males during upstream migration.

키워드

Chum salmon; Radio tag; Yeon-gok stream; Migration

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