ISSN : 1225-3480
본 연구는 2004년 2월부터 2005년 1월전라북도 군산시 고군산군도에서 통발어구로 채취된 피뿔고둥을 조사하였다. 피뿔고둥의 뚜껑에 나타난 윤문은 년 1회 형성되며 주 윤문 형성시기는 7월에서 8월로 조사되었으며, 초륜 형성기간은 13개월(1.08년)로 나타났다. 각고(SH)에 대한 각폭(SW)의 성장식은 SW = 0.7867 SH - 6.3988 (<TEX>$R^2$</TEX> = 0.8604), 총중량(TW)의 상대성장식은 TW = 0.0000626 <TEX>$SH^{3.206}$</TEX> (<TEX>$R^2$</TEX> = 0.8324)과 같이 나타낼 수 있었다. 연령(t)에 대한 각고(SH)와 총중량(TW)의 von Bertalanffy 성장식은 다음과 같다. <TEX>$SH_t=199.653(1-e^{-0.104(t+2.478)}$</TEX> <TEX>$TW_t=1484.105(1-e^{0.104(t+2.478)})^{3.206}$</TEX>.
Based on 1,260 samples, the age and growth of purple whelk, Rapana venosa (Valenciennes) (Gastropoda:Muricidae) have been investigated. The samples were collected monthly during one year time (from February, 2004 to January, 2005) from the West Sea of Korea. The age of R. venosa was determined by the ring of the operculum analysis. The relationship between whelk’s shell height and ring radius in each ring group was expressed as an equation of linear regression and later a correspondence in each ring formation was determined. Based on the monthly variations in the marginal index (MI) of the operculum, it was assumed that the ring of this species has been formed once a year during the period from July to August. The relationship between shell height and shell width was expressed by the equation [공식](R²=0.8604); and between shell height and total weight by the equation [공식] (R²=0.8324). The purple whelk’s spawning period was estimated through the fatness analysis and has occurred during the period from May to July. Obtained results suggests that the ring formation occurs once a year (in July) and the length of time period since the first ring has been formed on the operculum is approximately 13 months (1.08 year). The purple whelk’s growth curves for shell height and total weight fitted to the von Bertalanffy's equation and were expressed as follows: [공식] [공식]
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