Trade-off between fertility and predation risk drives a geometric sequence in the pattern of group sizes in baboons

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-4
Series
Biology Letters, Volume 14, issue 3
Abstract
Group-living offers both benefits (protection against predators, access to resources) and costs (increased ecological competition, the impact of group size on fertility). Here, we use cluster analysis to detect natural patternings in a comprehensive sample of baboon groups, and identify a geometric sequence with peaks at approximately 20, 40, 80 and 160. We suggest (i) that these form a set of demographic oscillators that set habitat-specific limits to group size and (ii) that the oscillator arises from a trade-off between female fertility and predation risk.
Description
Keywords
Evolutionarily stable strategy, Fertility, Fission, Predation risk, Social organization
Other note
Citation
Dunbar , R I M , MacCarron , P & Robertson , C 2018 , ' Trade-off between fertility and predation risk drives a geometric sequence in the pattern of group sizes in baboons ' , Biology Letters , vol. 14 , no. 3 , 20170700 , pp. 1-4 . https://doi.org/10.1098/rsbl.2017.0700