Listar Producción científica por autor "Crognier, E"

Mostrando ítems 1-3 de 3

    • Helping patterns and reproductive success in Aymara communities 

      Crognier, E; Villena, M; Vargas, E (American Journal of Human Biology, 2002)
      Abstract. “Helpers at the nest,” young adults remaining in their parents home to take care of younger siblings, are known in many species of birds and mammals. Similar behaviors are occasionally observed in human societies ...

    • Preference for sons and sex ratio in two non-western societies 

      Crognier, E; Baali, A; Hilali, MK; Villena, M; Vargas, E (American Journal of Human Biology, 2006)
      ABSTRACT Moroccan Berbers and the Bolivian Aymara are two unrelated peasant groups living in adverse environments with a still rather traditional agriculture. Precarious life conditions may be responsible for the importance ...

    • Reproduction in high altitude aymara : physiological stress and fertility planning? 

      Crognier, E; Villena, M; Vargas, E (J. Biosoc. Sci., 2002)
      Summary. Reproductive characteristics at high altitude are described based on the reproductive histories of 720 Aymara women, collected in 1998 and 1999 in a group of twelve peasant communities at ...