Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Estimation of Spawning Season of Clupea pallasii in the Jinhae Bay and Coastal Waters of Tongyeong in Gyeongnam Using Scuba Observation

잠수관찰을 통한 경남 진해만과 통영 연안 청어 Clupea pallasii의 산란기 추정

  • Lee, Yong-Deuk (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Lee, Gang-Min (Gyeongsangnam-do Freshwater Fish Research Center) ;
  • Park, Jong-Yul (Marine Bio-Education and Research Center, Gyeongsang National University) ;
  • Gwak, Woo-Seok (Marine Bio-Education and Research Center, Gyeongsang National University)
  • 이용득 (국립수산과학원 수산자원연구센터) ;
  • 이강민 (경상남도수산자원연구소 민물고기연구센터) ;
  • 박종율 (국립경상대학교 해양생명과학과 해양생물교육연구센터) ;
  • 곽우석 (국립경상대학교 해양생명과학과 해양생물교육연구센터)
  • Received : 2020.02.28
  • Accepted : 2020.03.24
  • Published : 2020.03.31
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Abstract

The purpose of this study is to clarify when spawning occurs of Clupea pallasii in the coastal waters of Jinhae Bay and Yeongun-ri, Tongyeong, Korea from December to February using SCUBA observation which is known as spawning season. Eighteen surveys of SCUBA diving observations have performed at 3 stations of Jinhae Bay from December 2017 to January 2018 and 24 times of survey at Yeongun-ri, Tongyeong from December 2017 to February 2018. In Jinhae Bay, average 740,274 eggs/㎡ fertilized eggs were observed in Judo Island and average 671,718 eggs/㎡ were observed in Gusan-myeon. On December 30, 2017, about 388,444 eggs/㎡ fertilized eggs were observed in Yeongun-ri, Tongyeong but no eggs were founded in next surveys. The results in this study suggest that spawning season of C. pallasii in the coastal waters of Jinhae Bay and Tongyeong begins in late December at average 7.7℃ water temperature.

이번 연구는 산란기로 알려진 12월부터 2월까지 경남 진해만과 통영 연안에서 잠수조사를 통해 산란회유하는 청어의 산란기를 명확히 밝히는 데 목적이 있다. 경남 진해만에서 2017년 12월부터 2018년 1월까지 3개의 정점에서 총 18회, 통영 영운리 연안에서는 2017년 12월부터 2018년 2월까지 총 24회 잠수조사를 통해 결과를 분석하였다. 조사기간 중 확인된 청어 수정란은 진해만 저도 연안에서 평균 740,274개/㎡, 진해만 구산면 연안에서는 평균 671,718개/㎡였다. 통영 영운리 연안에서는 2017년 12월 30일에 388,444개/㎡개의 수정란이 1회 관찰되었고 그 이후 조사에서는 관찰되지 않았다. 이번 연구결과 경남 진해만과 통영 연안에서 청어 산란은 12월 말에 시작되고 이때의 수온은 평균 7.7℃였다.

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References

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