Colony size predicts division of labour in Attine ants

Ferguson-Gow, Henry, Sumner, Seirian, Bourke, Andrew F. G. ORCID: and Jones, Kate E. (2014) Colony size predicts division of labour in Attine ants. Proceedings of the Royal Society B, 281. ISSN 1471-2954

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Division of labour is central to the ecological success of eusocial insects, yet the evolutionary factors driving increases in complexity in division of labour are little known. The size–complexity hypothesis proposes that, as larger colonies evolve, both non-reproductive and reproductive division of labour become more complex as workers and queens act to maximize inclusive fitness. Using a statistically robust phylogenetic comparative analysis of social and environmental traits of species within the ant tribe Attini, we show that colony size is positively related to both non-reproductive (worker size variation) and reproductive (queen–worker dimorphism) division of labour. The results also suggested that colony size acts on non-reproductive and reproductive division of labour in different ways. Environmental factors, including measures of variation in temperature and precipitation, had no significant effects on any division of labour measure or colony size. Overall, these results support the size–complexity hypothesis for the evolution of social complexity and division of labour in eusocial insects. Determining the evolutionary drivers of colony size may help contribute to our understanding of the evolution of social complexity.

Item Type: Article
Uncontrolled Keywords: formicidae,queen-worker dimorphism,worker size polymorphism,social evolution,caste evolution
Faculty \ School: Faculty of Science > School of Biological Sciences
UEA Research Groups: Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation
Faculty of Science > Research Groups > Organisms and the Environment
Depositing User: Pure Connector
Date Deposited: 02 Jan 2015 12:18
Last Modified: 17 May 2023 05:30
DOI: 10.1098/rspb.2014.1411


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