전자저널 > 전자저널 > Management of the Hen Clam, Mactra chinensis Philippi, on the Coast of Kunsan. Ⅰ. Age and Growth

Management of the Hen Clam, Mactra chinensis Philippi, on the Coast of Kunsan. Ⅰ. Age and Growth

Dong-Ki Ryu and Yong-Ho Kim

Faculty of Marine Life Science, College of Ocean Science & Technology, Kunsan Nathional University, Kunsan 573-360, Korea

The relationship between shell length and ring radius in each ring group was expressed as a regression line. Therefore, there is a correspondence in each ring formation. Based on the monthly variation of the marginal index (MI') of the shell, it is assumed that the ring of this species was formed once a year during the period of August to October, and the main period of the annual ring formation was August through September. The relationship between shell length (SL) and total weight (TW) was expressed by the equation TW = 2.2476 x 10-5 SL3.536 (r2 = 0.90). Shell length (SL) and shell height (SH; mm) were highly correlated with the equation SH = 0.7545 SL - 0.0145 (r2 = 0.93). The shell length (SL)-shell width (SW) relation was expressed by the equation SW = 0.5336 SL - 2.4253 (r2 = 0.87). Growth curves for shell length and total weight fitted to the von Bertalanffy's equation were expressed as follows

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