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Stock Assessment and Management of Turban shell, Turbo (Batillus) cornutus Lightfoot, 1786 in Jeju Coastal waters, Korea  

Kwon, Dae-Hyeon (Subtropical Fisheries Research Center, NFRDI)
Chang, Dae-Soo (Subtropical Fisheries Research Center, NFRDI)
Lee, Seung-Jong (Subtropical Fisheries Research Center, NFRDI)
Koo, Jun-Ho (Subtropical Fisheries Research Center, NFRDI)
Kim, Byung-Yeob (Subtropical Fisheries Research Center, NFRDI)
Publication Information
The Korean Journal of Malacology / v.26, no.4, 2010 , pp. 291-296 More about this Journal
Abstract
Samples of Turbo (Batillus) cornutus Lightfoot, 1786 in Jeju Island were collected from September 2009 to May 2010. Population ecological parameters and stock assessment of the turban shell were determined, based on the length and age composition data from 2000 to 2009 and ecological parameters. Instantaneous coefficient of total mortality (Z) of turban shell was estimated to be 2.2062/year. The estimated instantaneous coefficient of natural mortality (M) was 0.874/year. The age of turban shell at its first capture ($t_c$) was 2.636 year. Yield-per-recruit were estimated under harvest strategies that based on $F_{max}$, $F_{0.1}$, $F_{35%}$, and $F_{40%}$ was 10.44 g, 1.87 g, 6.53 g and 7.46 g.
Keywords
Turban shell; Natural mortality; Fishing mortality; Yield-per-recruit;
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