전자저널 > 전자저널 > Studies on the Population Dynamics of Surf Clam, Mactra veneriform is Reeve (Bivalvia) in the Coast of Kunsan, KoreaⅡ. Production

Studies on the Population Dynamics of Surf Clam, Mactra veneriform is Reeve (Bivalvia) in the Coast of Kunsan, KoreaⅡ. Production

Dong-Ki Ryou

Department of Aquaculture, Kunsan National University, Kunsan 573-702, Korea

Surf clam (Mactra veneriformis) was extensively utilized as a raw material for manufacturing flavoring materials as well as alive feed at various aquaculture farm, but with a tendency of decreasing its resources, it is now being favored for human consumption. The aim of this studies were to provide information to keep this important resources and maintain sustained yield in Korea. Secondary production of Mactra veneriformis was investigated during the period from March 1990 to February 1991 in the coast of Kunsan. The first recruit period was in July when the shell length was 0.75 ㎜. Six age group (cohort) from 0 to 5 years old were identified in the studied area. Instantaneous growth rate was lowest in winter period, but instantaneous mortality rate was highest in summer period. Estimated annual standing crop and production were 3,856 g/㎡ and 3,933 g/㎡ in wet total weight respectively. The turnover rate of 1.20 per year was relatively high compared with the rates of other species and turnover time was 0.986 years.

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