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ISSN : 1225-3480

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29권 2호

서산 대죽리 패총에서 출토된 말백합 Meretrix petechialis (Lamarck)의 성장 연구

Growth Analysis of the hard clam, Meretrix petechialis (Lamarck) collected from the Daejuk-ri Shell Middens, Seosan, Korea

류동기 (군산대학교 해양생명과학과)
안덕임 (한서대학교 문화재보존학과)
한국패류학회지 / The Korean Journal of Malacology, (P)1225-3480;
2013, v.29 no.2, pp.121-127
https://doi.org/10.9710/kjm.2013.29.2.121
류동기, & 안덕임. (2013). 서산 대죽리 패총에서 출토된 말백합 Meretrix petechialis (Lamarck)의 성장 연구. , 29(2), 121-127, https://doi.org/10.9710/kjm.2013.29.2.121

초록

본 연구에서는 신석기시대의 서산 대죽리 패총에서 출토된 말백합의 패각에 나타난 윤문을 판독하여 성장식을 추정하고 현재의 말백합 개체군과의 성장을 비교하였다. 패총 출토 패각의 수는 총 206개체였다. 각 연령군별로 각장과 윤경 간에 대응성을 보였고, 각 윤문군이 비교적 뚜렷이 구분되어 윤문판독의 타당성이 확인되어 판독된 윤문을 연륜으로 간주하였다. 패총 출토 말백합의 윤문은 2-5개까지 확인되어 2-5세군으로 구성되었음을 알 수 있었다. 패총 개체군의 성장식은 $SL_t=102.9025[1-e^{-0.18657(t+1.0906)}]$ 이었으며, 현생 개체군은 $SL_t=104.2583[1-e^{-0.2277(t+0.7499)}]$ 이었다. 각장 (SL) 과 각고 (SH) 간의 상대성장식은 패총 개체군 SH = 0.7791SL + 3.6636 ($R^2$ = 0.946) 이었으며, 현생 개체군은 SH = 0.8103SL + 0.5145 ($R^2$ = 0.991) 이었다. 두 개체군의 성장계수 (k) 는 차이가 없었고 (p < 0.05), 극한각장 ($SL_{\infty}$) 은 차이가 있었으나 (p > 0.05) 전체적으로 두 개체군의 상대성장식의 차이는 크지 않아 성장의 차이는 없다고 할 수 있다. 이는 두 개체군의 서식 환경이 비슷하다는 것을 의미한다. 따라서 신석기시대의 대죽리 패총이 형성될 당시 인근 연안의 해수온은 현재의 김제 연안지역과 비슷하게 높았을 가능성이 있는 것으로 추정된다.

keywords
Daejuk-ri Shell Midden, hard clam (Meretrix petechialis), von Bertalanffy's growth curve, Neolithic, palaeoenvironment

Abstract

In this study, growth-line analysis was carried out on the hard clam (Meretrix petechialis) collected from the Neolithic shell middens in Daejuk-ri, Seosan, Korea, to reconstruct palaeoenvironment. Growth increments of 206 specimens of the clam were examined. The ages of the specimens were determined from the rings on the shells. The relationship between shell length and ring radius in each ring group was expressed as a regression line, indicating a correspondence in each ring formation. Growth pattern of the midden specimens was compared to that of modern ones collected from Gimje, Jeonbuk. Growth curves for shell length fitted to the von Berta anffy's growth curve were expressed respectively as follows: $SL_t=102.9025[1-e^{-0.18657(t+1.0906)}]$ in the shell midden specimens, $SL_t=104.2583[1-e^{-0.2277(t+0.7499)}]$ in the modern ones. The relationship between shell length (SL; mm) and shell height (SH; mm) was expressed by the following equations: SH = 0.7791 SL + 3.6636 ($R^2$ = 0.946) in the midden specimens, SH = 0.8103 SL + 0.5145 ($R^2$ = 0.991) in the modern ones. The results of the tests regarding the differences between regression coefficients and elevations of growth curves of these two populations demonstrate that the slopes were not significantly different (p < 0.05), but the elevations were (p > 0.05). However, overall growth curves of the midden and modern populations were not significantly different, indicating that shell growth environments of the two areas are similar. Therefore, it is likely that sea temperature near the midden area could be similar to that of present Gimje area, and thus temperature during the period of the midden formation could be higher than presently known.

keywords
Daejuk-ri Shell Midden, hard clam (Meretrix petechialis), von Bertalanffy's growth curve, Neolithic, palaeoenvironment

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