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Article
Geographic Variation in the Status Signals of Polistes dominulus Paper Wasps
PLoS ONE
  • Elizabeth A. Tibbetts, University of Michigan, Ann Arbor, Michigan
  • Oksana Skaldina, National Scientific Center Nikkita, Yalta, Crimea, Ukraine
  • Vera Zhao, Iowa State University
  • Amy L. Toth, Iowa State University
  • Maksim Skaldin, University of Turku, Finland
  • Laura Beani, University of Florence (Italy)
  • James Dale, Massey University, New Zealand
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2011
DOI
10.1371/journal.pone.0028173
Abstract

Understanding intraspecific geographic variation in animal signals poses a challenging evolutionary problem. Studies addressing geographic variation typically focus on signals used in mate-choice, however, geographic variation in intrasexual signals involved in competition is also known to occur. In Polistes dominulus paper wasps, females have black facial spots that signal dominance: individuals wasps with more complex ‘broken’ facial patterns are better fighters and are avoided by rivals. Recent work suggests there is dramatic geographic variation in these visual signals of quality, though this variation has not been explicitly described or quantified. Here, we analyze variation in P. dominulus signals across six populations and explore how environmental conditions may account for this variation. Overall, we found substantial variation in facial pattern brokenness across populations and castes. Workers have less broken facial patterns than gynes and queens, which have similar facial patterns. Strepsipteran parasitism, body size and temperature are all correlated with the facial pattern variation, suggesting that developmental plasticity likely plays a key role in this variation. First, the extent of parasitism varies across populations and parasitized individuals have lower facial pattern brokenness than unparasitized individuals. Second, there is substantial variation in body size across populations and a weak but significant relationship between facial pattern brokenness and body size. Wasps from populations with smaller body size (e.g. Italy) tend to have less broken facial patterns than wasps from populations with larger body size (e.g. New York, USA). Third, there is an apparent association between facial patterns and climate, with wasp from cooler locations tending to have higher facial pattern brokenness than wasps from warmer locations. Additional experimental work testing the causes and consequences of facial pattern variation will be important, as geographic variation in signals has important consequences for the evolution of communication systems and social behavior.

Comments

This is an article from PLoS ONE 6 (2011): 1, doi: 10.1371/journal.pone.0028173. Posted with permission.

Rights
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Copyright Owner
Tibbetts et al
Language
en
File Format
application/pdf
Citation Information
Elizabeth A. Tibbetts, Oksana Skaldina, Vera Zhao, Amy L. Toth, et al.. "Geographic Variation in the Status Signals of Polistes dominulus Paper Wasps" PLoS ONE Vol. 6 Iss. 12 (2011) p. 1 - 8
Available at: http://works.bepress.com/amy-toth/4/