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Age and Growth of the Jedo Venus Clam, Protothaca jedoensis on the West Coast of Korea

Ji-Hyun Kim, Jong-Sheek Kim, Yong-Ho Kim, Ee-Yung Chung and Dong-Ki Ryu

Faculty of Marine Life Science, Kunsan National University, Kunsan 573-360, Korea

Age and growth of the the Jedo venus clam, Protothaca jedoensis were investigated using samples from the subtidal zone of Boryeong, Chungcheongnam- do, Korea from January to December, 1999. The relationship between shell height and ring radius in each group was expressed as a regression line. Therefore, it could be recognized that there is a correspondence in the formation of each ring. Based on the monthly variation of the marginal index of the shell, it was suggested that the annual ring mark formation occurred during the period of February to March once a year. The relationship between shell height (SH) and total weight (TW) was represented by the non-linear equation: TW = 0.0007 SH2.8919, and also in the relationship between shell length (SL) and shell height (SH), shell height (SH) and shell width (SW) were represented by the linear equations and Growth curves for shell height and total weight fitted to the von Bertalanffy equation were expressed as

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