Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Occurrence of Regalecus russellii off the Coast of Gangwon-do, Korea and Coastal Environment

강원도 속초 연안에서 산갈치(Regalecus russellii) 출현과 연안환경

  • Jong-Won Park (Department of Ecology and Environment, Gangneung-Wonju National University) ;
  • Soon-Man Kwon (Incheon Fisheries Resources Research Institute) ;
  • Pyo-Il Han (Department of Ecology and Environment, Gangneung-Wonju National University) ;
  • Chung Il Lee (Department of Ecology and Environment, Gangneung-Wonju National University)
  • 박종원 (강릉원주대학교 해양생태환경학과 ) ;
  • 권순만 (인천광역시 수산자원연구소 ) ;
  • 한표일 (강릉원주대학교 해양생태환경학과 ) ;
  • 이충일 (강릉원주대학교 해양생태환경학과 )
  • Received : 2023.06.19
  • Accepted : 2023.08.29
  • Published : 2023.08.31
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Abstract

Regalecus russellii, which spends most of its life in the deep sea, occasionally appears in coastal waters. However, the reasons for its appearance remain unclear. In Korea, R. russellii mainly appears along the eastern coastal waters, and most of them are caught in fishing gear, such as gill nets, or are stranded on the shore; nevertheless, the frequency of appearance is extremely low. Even if found, this species is often identified to be morphologically similar to Trachipterus ishikawae, and comprehensive analysis to identify the species through sample collection is limited. Consequently, information on the biological characteristics of R. russellii appearing in the coastal waters of Korea is scarce. Herein, the anatomical characteristics of R. russellii caught in a gill net off the Gangwon-do coast on March 14, 2023, were analyzed, and coastal water temperature was measured using an ocean buoy. Our results showed that the individual was male, its total length was 320 cm, body weight was 27.52 kg, body length was 26.62 cm, gonad weight was 619.45 g, and liver weight was 218.71 g. The stomach was full of euphausiids. The water temperature changed drastically at 15-30 m roughly a week before the R. russellii individual was caught, and the subsurface water temperature was lower than 10 ℃. Our findings provide baseline data to understand the ecological characteristics of R. russellii appearing along the eastern coast of the Korea.

산갈치(Regalecus russellii)는 대부분을 심해에서 보내며 가끔 연안에 나타나는데, 그 이유는 명확히 알려져 있지 않다. 우리나라에서 산갈치는 주로 동해 연안을 따라 출현하는데, 특히 자망 등 어구에 의해 포획되는 경우와 연안에 좌초되어 출몰하는 경우가 높고 그 빈도는 극히 낮다. 또한 발견된다고, 하더라도 산갈치와 형태학적으로 유사한 투라치(Trachipterus ishikawae)로 판별되는 경우가 높다. 산갈치의 표본을 구하여 분석하는 것은 제한적이기 때문에, 이러한 이유로 우리나라 연안에 출현하는 산갈치의 생태학적 특징에 대해 거의 알려져 있지 않다. 본 연구는 2023년 3월 14일 강원도 앞바다에서 어획된 산갈치의 해부학적 특징을 관찰하였고, 해양 부이 자료를 이용한 수온 분석을 진행하였다. 분석 결과 산갈치는 수컷이었고, 전장은 320 cm, 전중은 27.52 kg, 체고는 26.62 cm, 생식소 중량은 619.45 g, 간중량은 218.71 g이었다. 산갈치의 위는 난바다 곤쟁이류로 가득 차 있었고, 산갈치가 어획되기 약 일주일 전부터 15~30 m 수심에서 강한 수온 변동이 있었으며, 저층 수온은 10℃ 미만이었다. 본 기술보고는 우리나라 동해 연안에서 나타날 수 있는 산갈치의 생태학적 특징을 이해하기 위한 기초 자료로 활용될 수 있을 것이다.

Keywords

Acknowledgement

본 연구는 해양수산부 재원으로 해양수산과학기술진흥원의 지원을 받아(기후변화에 따른 수산자원생물의 종 다양성 변화 진단과 미래 전망(20220214))수행되었습니다. 또한 산갈치 시료를 제공해 주신 송창석 선장님, 해부에 도움을 주신 경포아쿠아리움에 감사드립니다.

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