전자저널 > 전자저널 > Stock Assessment of Purplish Washington Clam, Saxidomus purpuratus in the Southern Coastal Waters of Korea

Stock Assessment of Purplish Washington Clam, Saxidomus purpuratus in the Southern Coastal Waters of Korea

Yeong Hye Kim, Dae Hyeon Kwon, Dong Woo Lee, Dae Soo Chang, Jong Bin Kim, Seong Tae Kim and Dong Ki Ryu

National Fisheries Research & Development Institute, Busan 619-902 Korea

Population ecological parameters and stock biomass of the purplish washington clam, Saxidomus purpuratus (Sowerby), in the southern coastal areas of Korea were determined based on the fishery data from the Divers Fisheries Cooperative and other available biological data. Instantaneous coefficient of total mortality (Z) of purplish Washington clam was estimated to be 0.7479/year. The estimated instantaneous coefficient of natural mortality (M) was 0.2012/year. From the values of Z and M, the instantaneous coefficient of fishing mortality coefficient (F) for the recent years was calculated to be 0.4578/year. The age of purplish Washington clam at its first capture (tc) was 2.7506 year. Yield-per-recruit and spawning biomass-per-recruit were estimated under harvest strategies that bases on Fmax, F0.1, F35% and F40% were shown as 81.60 g, 61.68 g, 115.07 g and 131.51 g, respectively. The acceptable biological catch (ABC) was estimated to be about 1,404 metric tons.

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