Isotopic evidence of dietary variability in subadults at the Usu-moshiri site of the Epi-Jomon culture, Japan
Isotopic evidence of dietary variability in subadults at the Usu-moshiri site of the Epi-Jomon culture, Japan
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日本表绳文文化有珠尻遗址亚成体饮食变异的同位素证据
DOI：
10.1016/j.jas.2013.05.015
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发表时间：
2013
期刊：
影响因子：
2.8
通讯作者：
Yoneda M
中科院分区：
文献类型：
--
作者：
Tsutaya T;Sawada J;Dodo Y;Mukai H;Yoneda M
本研究重建成人和亚成人饮食的狩猎采集人口Epi-Jomon文化（约2300-1700年BP）在日本，使用稳定同位素分析的碳和氮。研究结果表明，成年海狮高度依赖海洋资源，如海豹的膳食蛋白质摄入量，两性之间不存在显着的饮食差异。在亚成体中，我们根据不同的同位素特征发现了两种类型的饮食。一组个体的δ 13 C值低于成年雌性的平均值减去两个标准差，而δ 15 N值低于其他组的亚成体。这些低δ 13 C亚成体最晚在3.5龄时表明δ 15 N值相对较低。他们可能在断奶期间比在普通成人饮食中消耗更多的13 C耗尽的食物。在另一个高δ 13 C组中，他们的富集δ 15 N值在4岁时开始下降，并在5至6岁左右落入总成人平均值的两个标准差范围内。高δ 13 C组儿童的同位素值表明，他们在断奶期间会被喂食普通成人饮食。根据碳、氮同位素组成的相似性，围生物也可分为两类。我们的结果表明亚成体饮食的变异性，在阿伊努人的民族志研究中也发现了类似的变异性。
This study reconstructs adult and subadult diets of a hunter-gatherer population of the Epi-Jomon culture (approximately 2300–1700 years BP) in Japan, using the stable isotopic analysis of carbon and nitrogen. The results suggest that the Usu-moshiri adults were highly dependent on marine resources such as seals for their dietary protein intake and that no significant dietary differences existed between the sexes. Among subadults we found two types of diet on the basis of different isotopic signatures. One group consisted of individuals withδ13C values below than those of the adult female mean minus two standard deviations andδ15N values lower than those of subadults in the other groups. These low-δ13C subadults indicated relatively less enrichedδ15N values by 3.5 years of age at the latest. They probably consumed more13C-depleted foods during weaning than in the ordinary adult diet. In the other high-δ13C group, their enrichedδ15N values start to decline by four years of age and fall within the two-standard-deviations range of the total adult mean around five to six years of age. Isotopic values of children in this high-δ13C group suggest that they would have been fed ordinary adult diets during weaning. Perinates could also be divided into two groups on the basis of the similar patterns in their carbon and nitrogen isotope ratios. Our results indicate variabilities in the diets of subadults, and similar variabilities were also seen in ethnographic studies of the Ainu populations.