전자저널 > 전자저널 > Fisheries Management of an Abalone Haliotis diversicolor in the Eastern Coastal Waters of Jeju Island using Yield-per-recruit Model

Fisheries Management of an Abalone Haliotis diversicolor in the Eastern Coastal Waters of Jeju Island using Yield-per-recruit Model

Joon-Chul Ko, Joon-Taek Yoo, Young-Min Choi, Jae-Woo Kim and Yang-Jae Im

Jeju Fisheries Research Institute, NFRDI, Jeju-do, 690-192, Korea

We studied the management policy for Haliotis diversicolor fisheries in the coastal area of Sungsanpo using Yield-per-recruit model from 2004 to 2006. The age at first capture (tc) and fishing mortality (F) annually estimated during the study period decreased and increased, respectively. The maximum yield-per-recruit in 2004 was increased by increasing tc from the 2.012 year of current tc to 2.7 year or increasing F from the 0.574/year of current F to 0.800/year, and that in 2005 was increased by increasing tc from the 1.946 year of current tc to 2.5 year or increasing F from the 0.578/year of current F to 0.880/year. In 2006, the maximum yield-per-recruit was increased by increasing tc from the 1.926year of current tc to 3.1year or decreasing F from the 1.088/year of current F to 0.810/year. Further, although the current F in 2004 and 2005 was lower than the estimated FMAX, that in 2006 was higher than the estimated FMAX. These results indicate that the likelihood of growth overfishing with increasing catch of smaller H. diversicolor in 2006 was greater than in 2004 and 2005. As action that could prevent growth overfishing in fisheries management of H. diversicolor, increasing for the current tc could be a more appropriate policy because the artificial decrease of the number of woman divers related F is actually difficult.

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