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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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CPUE standardization of Pacific bluefin tuna caught by Korean offshore large purse seine fishery (2003-2016)

우리나라 대형선망어업에서 어획된 태평양참다랑어의 CPUE 표준화(2003-2016)

  • LEE, Sung Il (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • KIM, Doo-Nam (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • LEE, Mi-Kyung (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • JO, Heon-Ju (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • KU, Jeong-Eun (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science) ;
  • KIM, Jung-Jin (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science)
  • 이성일 (국립수산과학원 원양자원과) ;
  • 김두남 (국립수산과학원 원양자원과) ;
  • 이미경 (국립수산과학원 원양자원과) ;
  • 조헌주 (국립수산과학원 원양자원과) ;
  • 구정은 (국립수산과학원 원양자원과) ;
  • 김중진 (국립수산과학원 연근해자원과)
  • Received : 2018.04.30
  • Accepted : 2018.05.23
  • Published : 2018.05.31
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Abstract

Pacific bluefin tuna (Thunnus orientalis) has been mostly caught by the Korean offshore large purse seine fishery in Korean waters. The annual catch of Pacific bluefin tuna caught by the offshore large purse seine fishery in Korean waters showed less than 1,000 mt until the 1990s except for 1997. The catch sharply increased to 2,401 mt in 2000 and recorded the highest of 2,601 mt in 2003, but the catch has generally decreased with a fluctuation thereafter. The main fishing ground of Pacific bluefin tuna of this fishery is formed around Jeju Island. However, it expanded to the Yellow Sea, the coastal of Busan, and the East Sea, which depends on the migration patterns of Pacific bluefin tuna by season. The CPUE standardization of Pacific bluefin tuna was conducted using Generalized Linear Model (GLM) to assess the proxy of the abundance index. The data used for the GLM were catch (weight), effort (number of hauls), catch ratio of Pacific bluefin tuna, moon phase by year, quarter and area. The standardized CPUE from 2004 to 2011, except for 2003 and 2010, showed a steady trend, and then increased until 2014. The CPUE in 2015 decreased, and in 2016 was higher than that in 2015. The result of GLM suggests that the effect of the catch ratio of Pacific bluefin tuna is the largest factor affecting the nominal CPUE.

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References

  1. Akaike H. 1973. Information theory and an extension of the maximum likelihood principle. In Petrov BN and Csaki F, ed. 2nd International Symposium on Information Theory. Publishing house of the Hungarian Academy of Sciences, Budapest. 268-81. Reprinted in 1992 in Kotz S and Johnson N, ed. Breakthroughs in Statistics 1. Springer Verlag, New York, 610-624.
  2. Fukuda Y, Tsukahara Y and Sakai O. 2018. Updated standardized CPUE for 0-age Pacific bluefin tuna caught by Japanese troll fisheries: Updated up to 2016 fishing year. ISC/18/PBFWG-1/03, 1-11.
  3. Hoyle SD, Assan C, Chang ST, Fu D, Govinden R, Kim DN, Lee SI, Lucas J, Matsumoto T, Satoh K, Yeh YM and Kitakado T. 2017. Collaborative study of tropical tuna CPUE from multiple Indian Ocean longline fleets in 2017. IOTC-2017-WPTT19-32, 1-52.
  4. Lee MK, Lee SI, Kim ZG, Ku JE, Park HW and Yoon SC. 2015. The fishing characteristics of Korean tuna purse seine fishery in the Pacific Ocean. J Korean Soc Fish Technol 51(3), 414-423. (DOI: 10.3796/KSFT.2015.51.3.414)
  5. Moon DY, Yang WS, Kim SS, Koh JR and Kim EJ. 2005. Characteristics of the Korean tuna purse seine fishery in the Western and Central Pacific Ocean. J Korean Soc Fish Technol 41(4), 263-270. https://doi.org/10.3796/KSFT.2005.41.4.263
  6. NFRDI (National Fisheries Research and Development Institute). 2002. Fishing gear of Korea. Hangeul Graphics Publ. Co., Busan, 1-579.
  7. Sakai O and Tsukahara Y. 2018. Japanese coastal longline CPUE and catch-at-length for Pacific bluefin tuna: Update up to 2016 fishing year. ISC/18/PBFWG-1/01, 1-16.
  8. Sakai O, Nishikawa K, Fukuda H and Nakatsuka S. 2018. Input data of Pacific bluefin tuna fisheries for stock assessment model, Stock Synthesis 3; Simple update for 2018 assessment. ISC/18/PBFWG-1/06, 1-33.
  9. Shin A, Yoon SC, Lee SI, Park HW and Kim S. 2018. The relationship between fishing characteristics of Pacific bluefin tuna (Thunnus orientalis) and ocean conditions around Jeju Island. Fisheries and Aquatic Sciences, 21:1, 1-12. (DOI: 10.1186/s41240-017-0078-4)
  10. Yoo JT, Kim ZG, Lee SI, Yean IJ, Yoon SC and Lee DW. 2012. Recent update of Pacific bluefin tuna catch in Korean waters. ISC/12-1/PBFWG/19, 1-9.