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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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The fishery and fishing ground environment for red horsehead (Branchiostegus japonicus) on the adjacent seas of Jeju Island

제주도 근해의 옥돔 어업과 어장 환경에 관한 연구

  • Kim, Jeong-Chang (Department of Oceanography, Pukyong National University) ;
  • Kang, Il-Kwon (Division of Marine Production System Management, Pukyong National University) ;
  • Kim, Dong-Sun (Research Center for Ocean Industrial and Development(RCOID), Pukyong National University) ;
  • Lee, Jun-Ho (Training ship administrative center, Pukyong National University)
  • 김정창 (부경대학교 해양학과) ;
  • 강일권 (부경대학교 해양생산시스템관리학부) ;
  • 김동선 (부경대학교 해양산업개발연구소) ;
  • 이준호 (부경대학교 선박실습운영센터)
  • Published : 2006.02.28
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Abstract

To investigate the fishery and fishing ground environment of red horsehead (Branchiostegus japonicus), the author analyzed the fishery data and examined the amount of catches and oceanic environment on the adjacent seas of Jeju island and East China Sea. It was turned out that the favourable season of the red horsehead fishery is the month from March to June, the main fishing ground is located in 60 mile radius from the position $32.5^{\circ}N,\;125.7^{\circ}E$. The bottom seawater temperature in fishing ground was shown between $l3^{\circ}C\;and\;16^{\circ}C$, the salinity was appeared between 33.5 and 34.0psu without the seasonal variation of the year. Concentrations of materials(e.g, $NO_3^-\;and\;NO_2^-$) in spring and summer time in main fishing ground were higher than any other seasons, but that of phospheric materials were lower than any other seasons. Concentrations of $chlorophyll\;-\;{\alpha}$ in the main fishing ground was the highest in spring and summer at the surface layer, but the vertical profile of the $chlorophyll\;-\;{\alpha}$ concentrations in all seasons were not variable at bottom layer. Mean density of zooplankton abundance according to the vertical structure was higher and much stable in summer and autumn than spring and winter.

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References

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