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Social wasps reap the benefits of individualism

October 22, 2009 by myrmecos

A sampling of face patterns in Polistes fuscatus paper wasps

A sampling of face patterns in Polistes fuscatus paper wasps

Polistes fuscatus paper wasps sport a bewildering array of facial markings.  Why is this?

A new paper by Michael Sheehan and Elizabeth Tibbetts in the journal Evolution suggests natural selection may favor rare patterns, leading to a proliferation of diversity.  Sheehan & Tibbetts performed an elegant experiment on 18 groups of 4 foundress queens, painting three wasps with one pattern and the remaining one with a different pattern.  Regardless of the details of the actual face markings, the rare pattern consistently received less aggression than the common patterns.  In paper wasps, at least, different is better.

(as an aside, I should mention that I met Elizabeth Tibbetts in an elevator at the IUSSI meeting in Washington, D.C.  She introduced herself after she read my name badge and recognized who I was. Seems individual recognition is useful in our species, too…)

source: Sheehan, M. J., Tibbetts, E. A. 2009. Evolution of Identity Signals: Frequency-Dependent Benefits of Distinctive Phenotypes Used for Individual Recognition. Evolution online early, doi: 10.1111/j.1558-5646.2009.00833.x

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Posted in Nature, Science | Tagged Evolution, polistes | 1 Comment

One Response

  1. on January 28, 2010 at 6:12 pm Carl

    I’d buy a poster of that image. Such a poster might find a home in many science classrooms as well.



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