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Haplodiploidy, Sex-Ratio Adjustment, and Eusociality

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gardner2013americannaturalistE60.pdf (359.6Kb)
Date
03/2013
Author
Gardner, Andy
Ross, Laura
Keywords
Inclusive fitness
Kin selection
Local resource enhancement
Rarer-sex effect
Sex allocation
Social insects
Evolutionary stability
Termites
Model
Cockroaches
Behaviour
Monogamy
Helpers
Shrimps
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Abstract
Hamilton's "haplodiploidy hypothesis" holds that inflated sororal relatedness has promoted altruistic sib rearing in haplodiploids, potentially explaining their apparent predisposition to eusociality. Here, we suggest that haplodiploidy may instead promote eusociality simply by facilitating sex-ratio adjustment. Specifically, haplodiploidy may enable sex-ratio bias toward the more helpful sex, owing to "local resource enhancement," and such sex-ratio bias may promote the evolution of helping by individuals of that sex, owing to the "rarer-sex effect." This could explain why haplodiploidy appears to have been important for eusociality in taxa with only female helpers, such as ants, wasps, and bees, but not in taxa with both male and female helpers, such as termites.
Citation
Gardner , A & Ross , L 2013 , ' Haplodiploidy, Sex-Ratio Adjustment, and Eusociality ' , American Naturalist , vol. 181 , no. 3 , pp. E60-E67 . https://doi.org/10.1086/669147
Publication
American Naturalist
Status
Peer reviewed
DOI
https://doi.org/10.1086/669147
ISSN
0003-0147
Type
Journal article
Rights
© 2013 by The University of Chicago. All rights reserved.
Description
Funding: Balliol College and the Royal Society
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5080

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

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