서해산 키조개, Atrina (Servatrina) pectinata japonica의 연령과 성장

Age and Growth of the Pen Shell, Atrina (Servatrina) pectinata japonica (Reeve), on the West Coast of Korea

1995년 4월부터 1996년 3월까지 충청남도 보령시 연안에 서식하는 키조개를 총 701마리 채집하여 성장을 조사하였다. 1. 키조개의 패각에 나타나는 윤문은 년1회 형성되며 주 윤문형성시기는 6월에서 7월로 조사되었다. 2. 초륜 형성기간은 12개월(만 1년)로 나타났다. 3. 각고 (SH)와 총중량 (TW)간의 관계는 TW=5.906$\times$$10^{-3}$S $H^{3.3844}$이었으며, 각장 (SL)과 각고(SH)간의 관계는SL=0.5277SH+0.0934이고, 각장 (SL)과 각폭(SW)간의 관계는 SW=0.2681SH-1.3757였다. 4. 연령(t)에 대한 각고 (SH)와 총중량 (TW)의 Bertalanffy 성장식은 SHt=30.99(1-e-$^{0.321}$2(t+0.9653)/이고 (Fig.11) TWt=657.94(1-e-$^{0.321}$2(t+0.9653/)$^{3.3844}$(Fig. 12)였다.)였다.

Age and growth of the pen shell, Atrina (Servatrina) pectinata japonica, on the west coast of Korea were studied based on 701 samples caught in April 1995 to March 1996. The results are summarized as follows: the relationship between shell height and ring radius in each ring 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 (MI') of the shell, it was assumed that the ring of this species was formed once a year during the period of June to July. The relationship between shell height (SH) and total weight (TW) were expressed by the following equation TW = 5.906$\times$10/$^{-3}$SH$^{3.844}$. Shell length (SL) and shell height were highly correlated according to the following equation SL = 0.5277 SH +0.0934. The shell height-shell width (SW) relation was expressed by the following equation SW = 0.2681 SH -1.3757. Growth curves for shell height and total weight fitted to the von Bertalanffy's equation were expressed as: SHt=30.99(1-e-$^{-0.3212(t+0.9653)}$, TWt=657.94(1-e-$^{-0.3212(t+0.9653}$)$^{3.3844}$.