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When mothers need others: The impact of hominin life history evolution on cooperative breeding

Kramer, Karen L ; Otárola-Castillo, Erik

Journal of Human Evolution, July 2015, Vol.84, pp.16-24 [Periódico revisado por pares]

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  • Título:
    When mothers need others: The impact of hominin life history evolution on cooperative breeding
  • Autor: Kramer, Karen L ; Otárola-Castillo, Erik
  • Assuntos: Human Evolution ; Juvenility ; Intergenerational Transfers ; Parental Care ; Anthropology ; Biology
  • É parte de: Journal of Human Evolution, July 2015, Vol.84, pp.16-24
  • Descrição: The evolution of cooperative breeding is particularly complex in humans because many other traits that directly affect parental care (shorter birth intervals, increased offspring survivorship, juvenile dependence, and older ages at dispersal) also emerge during the Pleistocene. If human cooperative breeding is ancient, it likely evolved in a hominin lacking a fully modern life history. However, the impact that changing life history traits has on parental care and cooperative breeding has not been analytically investigated. We develop an exploratory model to simulate an economic problem that would have arisen over the course of hominin life history evolution to identify those transitions that produced the strongest pressures for cooperative childrearing. The model generates two central predictions. First, help within maternal-offspring groups can support early changes in juvenile dependence, dispersal age, birth intervals, and fertility. If so, maternal-juvenile cooperation may...
  • Idioma: Inglês

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