Recent archaeological excavations on Rakahanga Atoll, Northern Cook Islands, produced one of the earliest examples of dog (Canis familiaris) remains found on East Polynesian atolls. Direct dating of these and other Pacific Island fauna by AMS is complicated by a number of factors. (1) The animals’ diets may consist of marine and terrestrial protein. (2) Marine 14C is itself a mix of carbon pools with localized offsets that vary over time and space. (3) The region is potentially impacted by inter-hemispheric mixing of atmospheric 14C. Stable isotope analysis of gelatin extracted from dog teeth was used to estimate marine/terrestrial dietary components and paired terrestrial and marine samples were used to constrain local atmospheric and marine carbon offsets. The dates were modeled as a phase in a Bayesian chronological framework using mixed calibration curves. The resulting models confirm the presence of dogs on Rakahanga shortly after the initial colonization of the region and suggest that dogs were among the species that accompanied voyagers as they discovered and settled new islands. These methods can be applied to accurately date any marine-influenced terrestrial vertebrate remains in Remote Oceania.

中文翻译：

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来自陆地和海洋：克服在波利尼西亚群岛上直接约会狗的挑战

最近在库克群岛北部的拉卡汉加环礁进行的考古发掘产生了最早的犬类（犬类) 在东波利尼西亚环礁上发现的遗骸。AMS 对这些和其他太平洋岛屿动物群的直接测年因许多因素而变得复杂。(1) 动物的饮食可能包括海洋和陆地蛋白质。(2) 海事14C 本身是具有随时间和空间变化的局部偏移量的碳库的混合物。(3) 该地区可能受到半球间大气混合的影响14C. 使用从狗牙中提取的明胶的稳定同位素分析来估计海洋/陆地膳食成分，并使用配对的陆地和海洋样本来限制当地大气和海洋碳抵消。使用混合校准曲线将日期建模为贝叶斯时间框架中的一个阶段。由此产生的模型证实了在该地区最初殖民后不久在 Rakahanga 上存在狗，并表明狗是伴随航海者发现和定居新岛屿的物种之一。这些方法可用于准确确定偏远大洋洲任何受海洋影响的陆生脊椎动物遗骸的年代。