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ISSN : 1225-3480
2000년 7월부터 2001년 9월까지 전라북도 고창군 주진천에 서식하는 일본재첩의 서식지 환경과 성장을 조사하였다. 서식지의 월별 수온은 4.4-29.1℃로 나타났으며, 1월에 가장 낮았고, 8월에 가장 높았다. 지온은 3.5-31.0℃로 나타났으며 수온과 비슷하게 2월과 3월에 가장 낮았고 8월에 가장 높았다. 월별 염분은 0.1-20.2 psu로 평균 6.06 ± 6.37psu였다. 일본재첩의 패각에 나타나는 윤문은 년 1회 형성되며, 주된 윤문 형성시기는 2월-3월임을 확인할 수 있었다. 초륜의 형성 기간은 약 7개월 (0.58년) 으로 나타났으며, 각장과 각고간의 관계는 SH = 0.9174 SL - 0.9935 (R2 = 0.9885) 이었고, 각장과 각폭간의 관계는 SW = 0.5925 SL - 1.1706 (R2 = 0.9726)이며, 각장과 각폭간의 관계는 TW = 1.0942 × 10-4 SL3.3217 (R2 = 0.9905)로 나타났다. 연령 (t) 에 대한 각장 (SL) 의 Bertalanffy 성장식은 SLt = 46.4861 (1-e-0.3383(t+0.0958)) 였으며, 전중량 (TW) 의 Bertalanffy 성장식은 TWt = 34.54 (1-e-0.3383(t+0.0958))3.3217로 추정되었다.
Samples of Corbicula japonica Prime of Jujin estuary in Gochang were collected from July 2000 to September 2001. Age of C. japonica was determined from the rings on the shell. 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 February and March. The relationship between shell length (SL; mm) and total weight (TW; g) was expressed by the following equation: TW = 1.0942 x 10-4 SL3.3217 (r2 = 0.9905). Shell length (SL) and shell height (SH; mm) was highly correlated with shell height as the following equation: SH = 0.9174 SL - 0.9935 (r2 = 0.9885). The shell length (SL) - shell width (SW) relation was also expressed by the following equation; SW = 0.5925 SL - 1.1706 (r2 = 0.9726). Growth curves for shell length and total weight fitted to the von Bertalanffy's growth curve were expressed as:
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