Research article

Insectes Sociaux

, Volume 53, Issue 2, pp 226-232

Modelling the role of intracolonial genetic diversity on regulation of brood temperature in honey bee (Apis mellifera L.) colonies

  • S. GrahamAffiliated withSchool of Mathematics and Statistics, University of SydneyCSIRO Sustainable Ecosystems
  • , M. R. MyerscoughAffiliated withSchool of Mathematics and Statistics, University of Sydney
  • , J. C. JonesAffiliated withBehaviour and Genetics of Social Insects Laboratory, School of Biological Sciences A12, University of Sydney
  • , B. P. OldroydAffiliated withBehaviour and Genetics of Social Insects Laboratory, School of Biological Sciences A12, University of Sydney

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Abstract.

In polyandrous social insects such as honey bees, a worker’s affinity for a particular task may be genetically infl uenced and so some patrilines may have lower stimulus thresholds for commencing a task than others. We used simulation models to investigate the effects of intracolonial diversity in the task thresholds that stimulate workers to engage in heating and cooling during nest thermoregulation. First, we simulated colonies comprised of one or 15 patrilines that were engaged in heating the brood nest, and observed that single patriline colonies maintained, on average, less stable brood nest temperatures than multiple patriline colonies. Second we simulated colonies with five patrilines that were engaged in cooling their nest, recording the proportions of bees of different patrilines that engaged in nest cooling in response to changing temperatures. Both of our simulations show remarkably similar qualitative patterns to those that we have previously observed empirically. This provides further support for the hypothesis that geneticallybased variability in task thresholds among patrilines within honey bee colonies is an important contributor to the ability of colonies to precisely thermoregulate their nests, and we suggest that diversity is important for optimal expression of a range of other colony-level phenotypes.

Keywords.

Polyandry task threshold computer simulation Apis mellifera thermoregulation