Kinship ties across the lifespan in human communities
Kinship ties across the lifespan in human communities
复制标题
人类社会中贯穿一生的亲属关系纽带
DOI：
10.1098/rstb.2018.0069
复制
发表时间：
2019-09-02
影响因子：
6.3
通讯作者：
Massengill, Eric
中科院分区：
文献类型：
--
作者：
Koster, Jeremy;Lukas, Dieter;Massengill, Eric
人类谱系中生殖后寿命较长的进化假设涉及年轻移民女性和新群体中年长女性之间的相关性不对称。在这种情况下，年轻女性和老年女性之间的代际生殖冲突预计将有利于年轻女性，谁实现较少的包容性健身效益放弃生殖给他人解决。这个概念模型预计，一个社区的移民最初与群体中的其他人没有什么亲属关系，随着他们的后代留在群体中，他们逐渐与群体成员表现出更大的关系。我们在一个跨文化的社区样本中研究了这一预测，这些社区在性别偏见的传播模式和社会组织的其他方面各不相同。根据家谱和人口统计数据，分析提供了一般但不全面的支持，预测移民与其他群体成员的平均相关性随着年龄的增长而增加。在极少数情况下，社区的纳塔尔成员也表现出与年龄相关的相关性增加。我们还发现，女性群体成员的移民比例有很大的变化，超出了简单的传统考虑的patrilocality或matrilocality，这提出了问题的情况下，这种假设的女性竞争得到满足。我们认为这些异质性的结果可能的解释，我们解决方法上的考虑，值得更多关注的研究在人类society.This文章的亲属关系和生殖冲突的主题问题的一部分“女性偏见的亲属关系在人类和其他哺乳动物的演变”。
A hypothesis for the evolution of long post-reproductive lifespans in the human lineage involves asymmetries in relatedness between young immigrant females and the older females in their new groups. In these circumstances, inter-generational reproductive conflicts between younger and older females are predicted to resolve in favour of the younger females, who realize fewer inclusive fitness benefits from ceding reproduction to others. This conceptual model anticipates that immigrants to a community initially have few kin ties to others in the group, gradually showing greater relatedness to group members as they have descendants who remain with them in the group. We examine this prediction in a cross-cultural sample of communities, which vary in their sex-biased dispersal patterns and other aspects of social organization. Drawing on genealogical and demographic data, the analysis provides general but not comprehensive support for the prediction that average relatedness of immigrants to other group members increases as they age. In rare cases, natal members of the community also exhibit age-related increases in relatedness. We also find large variation in the proportion of female group members who are immigrants, beyond simple traditional considerations of patrilocality or matrilocality, which raises questions about the circumstances under which this hypothesis of female competition are met. We consider possible explanations for these heterogenous results, and we address methodological considerations that merit increased attention for research on kinship and reproductive conflict in human societies.This article is part of the theme issue 'The evolution of female-biased kinship in humans and other mammals'.