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  1. Relationships between subsistence and age at weaning in "preindustrial" societiesSellen, Daniel W. - Human Nature, 2001 - 3 Hypotheses

    This study tests the weaning food availability hypothesis, that both the introduction of foods other than breastmilk and the cessation of breastfeeding will vary by society's subsistence type. This hypothesis has implications for demography, as accelerated weaning can lead to increases in both mothers' fertility (due to decreased birth intervals) and infant mortality (due to the presence of pathogens in new foods).

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  2. Fertility and mode of subsistence: a phylogenetic analysisSellen, Daniel W. - Current Anthropology, 1997 - 1 Hypotheses

    This study tests for a relationship between subsistence type and fertility using phylogenetic and statistical analyses. The authors find a clear relationship between dependence on agriculture and fertility among non-permanently settled groups.

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  3. Extracted-Food Resource-Defense Polygyny in Native Western North American Societies at ContactSellen, Daniel W. - Current Anthropology, 2004 - 3 Hypotheses

    In this article, the authors seek to understand the connection between male resource-holding potential and male mating success. This connection has been suggested by behavioral ecologists as a way of explaining differing rates of polygyny across cultures. The authors investigate this relationship by testing the relationship between rates of polygyny and male control of local subsistence sites among North American societies during the period of contact. They find a positive relationship between these two variables for both terrestrial and aquatic game, but not for gathered plants. This suggests support for the theory.

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