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http://dx.doi.org/10.3796/KSFT.2012.48.4.445

Forecasting biomass and recruits by age-structured spawner-recruit model incorporating environmental variables  

Lee, Jae Bong (Dokdo Fisheries Research Center, NFRDI)
Lee, Dong Woo (Fisheries Resources Management Division, National Fisheries Research & Development Institute)
Choi, Ilsu (Department of Statistics, Chonnam National University)
Zhang, Chang Ik (Department of Marine Production System Management, Pukyong National University)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.48, no.4, 2012 , pp. 445-451 More about this Journal
Abstract
We developed an age-based spawner-recruit model incorporating environmental variables to forecast stock biomass and recruits of pelagic fish in this study. We applied the model to the Tsushima stock of jack mackerel, which is shared by Korea and Japan. The stock biomass of jack mackerel (Trachurus japonicus) around Korean waters ranged from 141 thousand metric tons (mt) and 728 thousand mt and recruits ranged from 27 thousand mt to 283 thousand mt. We hind-casted the stock biomass to evaluate the model performance and robustness for the period of 1987~2009. It was found that the model has been useful to forecast stock biomass and recruits for the period of the lifespan of fish species. The model is also capable of forecasting the long-term period, assuming a certain climatic regime.
Keywords
Spawner-recruit model; Biomass; Recruits; Forecast; Jack mackerel; Korea;
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