Hunter-Gatherer Demography

在这个项目中，研究人员将采取生殖 来自巴拉圭印第安人社会的男性和女性的历史， 为了将它们的人口统计学与其他猎人进行比较， 采集（觅食）群体。 PI希望获得有关 过去几年的出生和死亡人数， 自1971年以来的出生和死亡记录。 他们还将 观察部落之间的工作模式和社会关系 成员 PI将分析人口的年龄性别结构， 死亡原因和死亡率、妇女生育率、男子 生育率和人口增长率。 他们将测试 关于部落成员之间生殖权衡的假设， 包括食物分享的作用，初婚年龄 对于两性来说，出生间隔， 后代，继父母，滥交和配偶共享。 他们还将分析 人口中的谋杀和凶杀。 这项研究将 为现代觅食的数据库做出了贡献 这一问题的紧迫性在于， 觅食的生活方式 只有通过收集这些数据， 科学家们仍然可以构建和测试模型， 关于我们的人口统计学参数 祖先直到最近。

In this project the investigators will take reproductive histories from men and women of an Indian society in Paraguay, in order to compare their demography with that of other hunter- gatherer (foraging) groups. The PI's hope to get data on the births and deaths in the past few years and access local records on births and deaths since 1971. They will also observe work patterns and social relationships among tribal members. The PI's will analyze the age-sex structure of the population, the causes and rates of mortality, women's fertility, men's fertility, and population growth rates. They will test hypotheses about reproductive tradeoffs among the tribesmen, including the role of food sharing, the age at first marriage for both sexes, the interbirth interval, the sex ratio of offspring, step-parenting, promiscuity and spouse-sharing. They will also analyse the causes and consequences of infanticide and homicide in the population. This research will contribute to the growing body of data on modern foraging peoples and is urgent because of the rapid disappearance of the foraging way of life. Only by collecting such data while it is still available can scientists construct and test models about the demographic parameters that characterized our ancestors until very recently.