Primate social group sizes exhibit a regular scaling pattern with natural attractors

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-01-01
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Mcode
Degree programme
Language
en
Pages
Series
Biology Letters, Volume 14, issue 1
Abstract
Primate groups vary considerably in size across species. Nonetheless, the distribution of mean species group size has a regular scaling pattern with preferred sizes approximating 2.5, 5, 15, 30 and 50 individuals (although strepsirrhines lack the latter two), with a scaling ratio of approximately 2.5 similar to that observed in human social networks. These clusters appear to form distinct social grades that are associated with rapid evolutionary change, presumably in response to intense environmental selection pressures. These findings may have wider implications for other highly social mammal taxa.
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Keywords
Clustering, Evolutionary rates, Female cohort, Optimal group size, Social networks
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Citation
Dunbar, R I M, Carron, P M & Shultz, S 2018, ' Primate social group sizes exhibit a regular scaling pattern with natural attractors ', Biology Letters, vol. 14, no. 1, 20170490 . https://doi.org/10.1098/rsbl.2017.0490