Ecology and sociality in a multilevel society: ecological determinants of spatial cohesion in hamadryas baboons

American Journal of Physical Anthropology
Amy Schreier, Larissa Swedell

Abstract

The multilevel society of hamadryas baboons, consisting of troops, bands, clans, and one-male units (OMUs), is commonly perceived to be an effective means of adapting to variable food availability while allowing spatial cohesion in response to predator pressure. The relationship between these variables, however, has never been tested quantitatively. The Filoha site in Awash National Park, Ethiopia is ideally suited to such an investigation as it contains nutrient-dense palm forests in addition to the Acacia scrublands typical of hamadryas distribution elsewhere, allowing comparisons of spatial cohesion across habitat types. Here, we use observations over a 1-year period to examine the relationship between resource availability, perceived predator pressure, and spatial cohesion in a band of wild hamadryas baboons at Filoha. Our results demonstrate that the band was more likely to break into OMUs when foraging in habitats with lower food availability, and that the band fissioned into independent clans more often when preferred resources were not available. Furthermore, the baboons remained in larger aggregations for longer periods of time (i.e., prior to embarking on their daily foraging route) on mornings after predators were he...Continue Reading

References

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Oct 22, 2008·Folia primatologica; international journal of primatology·Larissa SwedellAmy Schreier
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Aug 18, 2010·Folia primatologica; international journal of primatology·Amy L Schreier
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Citations

Oct 2, 2012·International Journal of Primatology·Cyril C GrueterDietmar Zinner
Sep 14, 2013·Journal of Anatomy·Jason DunnSarah Elton
Dec 3, 2014·American Journal of Physical Anthropology·Songtao GuoBaoguo Li
Dec 4, 2014·Journal of Human Evolution·Veronika StädeleLinda Vigilant
Jun 13, 2015·Royal Society Open Science·Sean A Rands
Jan 21, 2017·American Journal of Physical Anthropology·Julia FischerDietmar Zinner
Dec 12, 2018·American Journal of Primatology·Laura R BidnerLynne A Isbell
Jul 13, 2019·American Journal of Primatology·Amy L SchreierLarissa Swedell
Jan 30, 2020·American Journal of Primatology·Bing LinPeter J Fashing
Apr 3, 2018·American Journal of Physical Anthropology·Amanda J FuchsJason M Kamilar
Mar 6, 2021·American Journal of Primatology·Megan C HenriquezLarissa Swedell
Oct 20, 2019·Journal of Human Evolution·Larissa Swedell, Thomas Plummer
Jun 11, 2021·Primate Biology·Dietmar ZinnerJulia Fischer
Jun 28, 2021·Primates; Journal of Primatology·Vitor Luccas, Patrícia Izar
Jul 10, 2021·Movement Ecology·Danai PapageorgiouDamien R Farine

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