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http://dx.doi.org/10.5657/KFAS.2018.0313

Simulation-based Yield-per-recruit Analysis of Chub Mackerel Scomber japonicus in Korean Waters  

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)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.51, no.3, 2018 , pp. 313-320 More about this Journal
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.
Keywords
Chub mackerel; Potential yield; Fisheries management; Stock assessment;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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