摘要：Bone collagen was extracted from a series of Jomon skeletons from Iwashita Cave in Sasebo City, Nagasaki, Japan, which were excavated in 1964–1966 seasons. The radiocarbon dates on 5 skeletons from Layer V showed calibrated dates between 9000 and 10000 cal B.P. corresponding to the Initial (Earliest) Jomon period. The stable carbon and nitrogen isotope ratios suggested the following estimation for their diet: (1) some amount of aquatic animals was exploited, (2) most protein was originated from terrestrial ecosystem, and (3) their diet is more resemble to carnivores than herbivores. Their isotopic signatures were similar to the Initial Jomon skeletons from Tochibara Rockshelter in the mountainous area of Nagano. On the other, some coastal sites in the Initial Jomon periods showed significantly different isotopic values for carbon and nitrogen. The different food ecology had developed for inland and coastal population in the Initial Jomon period, which might have affected in the diversity of their morphological traits.
关键词：Jomon Culture ; ancient diet ; dating ; osteoarchaeology
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