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Selfish strategies and honest signalling: reproductive conflicts in ant queen associations. | LitMetric

Selfish strategies and honest signalling: reproductive conflicts in ant queen associations.

Proc Biol Sci

Department of Biology, Centre for Social Evolution, University of Copenhagen, Copenhagen, Denmark.

Published: July 2010

AI Article Synopsis

  • Social insects provide a valuable context for studying cooperation, signaling, and competition, particularly in scenarios where unrelated queens start a colony together and may kill each other to gain reproductive advantages.
  • An experiment with Lasius niger ants showed that queens reduce their worker production when sharing a nest with competitors, indicating selfish behavior aimed at conserving resources.
  • Chemical profiles (CHC) of the queens revealed that the presence of certain hydrocarbons indicates reproductive status and productivity, suggesting workers can discriminate between productive and non-productive queens, thus supporting the idea of honest signaling to foster cooperation.

Article Abstract

Social insects offer unique opportunities to test predictions regarding the evolution of cooperation, life histories and communication. Colony founding by groups of unrelated queens, some of which are later killed, may select for selfish reproductive strategies, honest signalling and punishment. Here, we use a brood transfer experiment to test whether cofounding queens of the ant Lasius niger 'selfishly' adjust their productivity when sharing the nest with future competitors. We simultaneously analysed queen cuticular hydrocarbon (CHC) profiles to investigate whether queens honestly signal their reproductive output or produce dishonest, manipulative signals, providing a novel test of the evolutionary significance of queen pheromones. Queens produced fewer workers when their colony contained ample brood, but only in the presence of competitors, suggesting selfish conservation of resources. Several CHCs correlated with reproductive maturation, and to a lesser extent with productivity; the same hydrocarbons were more abundant on queens that were not killed, suggesting that workers select productive queens using these chemical cues. Our results highlight the role of honest signalling in the evolution of cooperation: whenever cheaters can be reliably identified, they may incur sanctions that reduce the incentive to be selfish.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2880094PMC
http://dx.doi.org/10.1098/rspb.2009.2311DOI Listing

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