Abstract
Two novel behaviours, both adaptations of small hive beetles (Aethina tumida Murray) and Cape honeybees (Apis mellifera capensis Esch.), are described. Beetles puncture the sides of empty cells and oviposit under the pupae in adjoining cells. However, bees detect this ruse and remove infested brood (hygienic behaviour), even under such well-disguised conditions. Indeed, bees removed 91% of treatment brood (brood cells with punctured walls caused by beetles) but only 2% of control brood (brood not exposed to beetles). Only 91% of treatment brood actually contained beetle eggs; the data therefore suggest that bees remove only that brood containing beetle eggs and leave uninfected brood alone, even if beetles have accessed (but not oviposited on) the brood. Although this unique oviposition strategy by beetles appears both elusive and adaptive, Cape honeybees are able to detect and remove virtually all of the infested brood.
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Acknowledgements
We thank Nick and Helen James for access to the study site and Martin Villet and Sarah Radloff for statistical advice. The U.S. Department of Agriculture, Georgia Beekeepers Association (Georgia, USA), and Rhodes University provided financial support.
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Ellis, J.D., Richards, C.S., Hepburn, H.R. et al. Oviposition by small hive beetles elicits hygienic responses from Cape honeybees. Naturwissenschaften 90, 532–535 (2003). https://doi.org/10.1007/s00114-003-0476-6
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DOI: https://doi.org/10.1007/s00114-003-0476-6