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Primate sociality in evolutionary context.

Alexandra E Müller1, Christophe Soligo

  • 1Anthropological Institute and Museum, University of Zürich, 8057 Zürich, Switzerland. aem@aim.unizh.ch

American Journal of Physical Anthropology
|April 20, 2005
PubMed
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Primate sociality likely evolved from ancestral social networks, driven by the need to share information about patchy, yet predictable, fruit resources. This dietary factor, frugivory, is key to understanding primate social behavior.

Area of Science:

  • Primate social behavior
  • Mammalian evolutionary biology
  • Behavioral ecology

Background:

  • Understanding primate social organization diversity is crucial, yet limits and causes of social networking remain unclear.
  • All extant primates live in social networks, suggesting ancestral sociality and its role in primate origins.
  • Characterizing primate sociality within the broader mammalian context is essential for evolutionary insights.

Purpose of the Study:

  • To identify correlates of sociality and nonsociality in rodents as a model for inferring primate sociality causes.
  • To explore the role of diet, specifically frugivory, in the evolution and maintenance of primate sociality.

Main Methods:

  • Comparative analysis of social behavior and ecological factors in rodents.
  • Inferred evolutionary pressures on sociality based on rodent models.

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Main Results:

  • Sociality in primates is strongly linked to large body size, arboreal lifestyles, and diets rich in fruit.
  • Patchily distributed but predictable food resources like fruits favor social living through information sharing.
  • Frugivory is identified as a significant factor in the evolution and persistence of sociality in primates.

Conclusions:

  • The evolution of primate sociality is likely tied to the challenges and benefits of exploiting fruit resources.
  • Frugivory played a critical role in the maintenance of social lifestyles throughout primate evolution.
  • While the exact timing is uncertain, sociality was likely present early in primate evolution, possibly originating in the primate stem lineage.