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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Fishing characters of skate ray, Raja pulchra by the offshore longline fishery in Heuksan-do, Korea

흑산도 근해연승어업의 참홍어 (Raja pulchra) 어획 특성

  • Jo, Hyun-Su (Fisheries Resources and Environment Division, West Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Hwang, Hak-Jin (Korea Fisheries Resources Agency) ;
  • Kwon, Dae-Hyeon (Fisheries Resources and Environment Division, West Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Jeong, Gyeong-Suk (Fisheries Resources and Environment Division, West Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Choi, Kang-Ho (Fisheries Resources Research and Management Division, National Fisheries Research & Development Institute) ;
  • Cha, Byung-Yeul (Fisheries Resources and Environment Division, West Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Im, Yang-Jae (Fisheries Resources and Environment Division, West Sea Fisheries Research Institute, National Fisheries Research & Development Institute)
  • 조현수 (국립수산과학원 서해수산연구소 자원환경과) ;
  • 황학진 (수산자원사업단) ;
  • 권대현 (국립수산과학원 서해수산연구소 자원환경과) ;
  • 정경숙 (국립수산과학원 서해수산연구소 자원환경과) ;
  • 최광호 (국립수산과학원 자원관리과) ;
  • 차병열 (국립수산과학원 서해수산연구소 자원환경과) ;
  • 임양재 (국립수산과학원 서해수산연구소 자원환경과)
  • Received : 2011.08.16
  • Accepted : 2011.11.10
  • Published : 2011.11.30
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Abstract

Catches, CPUE, fishing season, disc width composition and fishing ground were studied to rebuild skate ray, Raja pulchra resource by the offshore longline fishery in Heuksan-do, Korea. Annual catches and CPUE of skate ray were increased from 2003 to 2010 (CPUE: from 2007 to 2010) continuously. The main fishing season of the skate ray was from December to next May. Disc width at 50% maturity for Raja pulchra by sex were estimated to be 65.83cm, 57.01cm by female and male respectively. The range of disc width was 22.3-112.0cm and the average disc width was 66.9cm, 60.0cm by female and male of Raja pulchra respectively during 2007-2010. Annual average of disc width of female skate ray was decreased from 2007 to 2010. The fishing grounds were formed from the coastal water off Hong-do to the coastal water off Gyeogyeolbiyeol-do, Korea. The center of fishing ground in October was formed in the northwestern coastal water off Gyeogyeolbiyeol-do and separated from that of the other months.

Keywords

References

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