Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Standardization of Catch per Unit Effort (CPUE) for Bigeye Tuna (Thunnus obesus) by the Korean Longline Fishery in the Pacific Ocean

한국 다랑어 연승어업에 의한 태평양해역 눈다랑어 자원의 단위노력당어획량 (CPUE)의 표준화

  • Yoo, Joon-Taek (Fisheries Resources Management Division, National Fisheries Research and Development Institute) ;
  • Hwang, Seon-Jae (Fisheries Resources Management Division, National Fisheries Research and Development Institute) ;
  • An, Doo-Hae (External Research Cooperation Division, National Fisheries Research and Development Institute) ;
  • Kim, Jong-Bin (Fisheries Resources Management Division, National Fisheries Research and Development Institute) ;
  • Kim, Zang-Geun (Fisheries Resources Management Division, National Fisheries Research and Development Institute)
  • 유준택 (국립수산과학원 자원관리과) ;
  • 황선재 (국립수산과학원 자원관리과) ;
  • 안두해 (국립수산과학원 대외협력과) ;
  • 김종빈 (국립수산과학원 자원관리과) ;
  • 김장근 (국립수산과학원 자원관리과)
  • Received : 2010.10.05
  • Accepted : 2010.12.06
  • Published : 2010.12.31
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Abstract

This study standardized the catch per unit effort (CPUE) of bigeye tuna (Thunnus obesus) caught by the Korean longline fishery in the Pacific Ocean. The study used a general linear model (GLM) to standardize the CPUE using catch and effort data aggregated by year, month, and $5{\times}5$ degrees of latitude and longitude in the tropical Pacific Ocean from 1982 to 2008 (except for 1988 and 1989). Explanatory variables in the GLM analysis included year, month, subtropical area, and number of hooks between floats (HBF). The study area and HBF were subdivided into three subtropical areas and six classes, respectively. During the study period, the standardized CPUE was significantly related to the nominal CPUE. The standardized CPUE declined sharply, as compared to the nominal CPUE, after the mid 1990s. In particular, the decline in the standardized CPUE in all subtropical areas in the 2000s was clearer than that of the nominal CPUE.

Keywords

References

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