Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Simulation-based Yield-per-recruit Analysis of Chub Mackerel Scomber japonicus in Korean Waters

모의실험을 통한 한국 연근해 고등어(Scomber japonicus)의 가입당 생산 분석

  • Lee, Kyunghwan (Department of Marin Life Science, Jeju National University) ;
  • Go, Seonggil (Department of Marin Life Science, Jeju National University) ;
  • Jung, Sukgeun (Department of Marin Life Science, Jeju National University)
  • 이경환 (제주대학교 해양생명과학과) ;
  • 고성길 (제주대학교 해양생명과학과) ;
  • 정석근 (제주대학교 해양생명과학과)
  • Received : 2018.05.16
  • Accepted : 2018.06.11
  • Published : 2018.06.30
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Abstract

Chub mackerel Scomber japonicus is an economically important pelagic species in the western North Pacific. In the last 50 years, the annual total catch in Korean waters showed large fluctuations, ranging from 100 to $420{\times}10^3tons$. To provide a biological reference point for management of chub mackerel, we applied a simulation-based yield-per-recruit (Y/R) model that considered both temperature-dependent growth and size-dependent mortality. We estimated the fisheries yield with respect to varying biological reference points and environmental conditions, including 1) the instantaneous rate of fishing mortality (F), 2) length of fish at first capture ($L_c$), and 3) water temperature. The result of our analysis showed that the Y/R could be greatest when the $L_c$ ranges from 19-27 cm and F ranges from $1.48-2.00yr^{-1}$. Y/R increases with increased water temperature between 15 and $23^{\circ}C$. We suggest targeting an $L_c$ of 17 cm (age=0.6 years) under the assumed current of $F=0.48yr^{-1}$ for maximizing the chub mackerel harvest. Further analysis considering spawning and recruitment processes are required to provide biological reference points to ensure the sustainability of chub mackerel fisheries in Korean waters.

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References

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