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1 October 2010 Wasp Hawking Induces Endothermic Heat Production in Guard Bees
K. Tan, H. Li, M.X. Yang, H.R. Hepburn, S.E. Radloff
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Abstract

When vespine wasps, Vespa velutina Lepeletier (Hymenoptera: Vespidae), hawk (capture) bees at their nest entrances alerted and poised guards of Apis cerana cerana F. and Apis mellifera ligustica Spinola (Hymenoptera: Apidae) have average thoracic temperatures slightly above 24° C. Many additional worker bees of A. cerana, but not A. mellifera, are recruited to augment the guard bee cohort and begin wing-shimmering and body-rocking, and the average thoracic temperature rises to 29.8 ± 1.6° C. If the wasps persist hawking, about 30 guard bees of A. cerana that have raised their thoracic temperatures to 31.4 ± 0.9° C strike out at a wasp and form a ball around it. Within about three minutes the core temperature of the heat-balling A. cerana guard bees reaches about 46° C, which is above the lethal limit of the wasps, which are therefore killed. Although guard bees of A. mellifera do not exhibit the serial behavioural and physiological changes of A. cerana, they may also heat-ball hawking wasps. Here, the differences in the sequence of changes in the behaviour and temperature during “resting” and “heat-balling” by A. cerana and A. mellifera are reported.

This is an open access paper. We use the Creative Commons Attribution 3.0 license that permits unrestricted use, provided that the paper is properly attributed.
K. Tan, H. Li, M.X. Yang, H.R. Hepburn, and S.E. Radloff "Wasp Hawking Induces Endothermic Heat Production in Guard Bees," Journal of Insect Science 10(142), 1-6, (1 October 2010). https://doi.org/10.1673/031.010.14102
Received: 9 February 2009; Accepted: 1 March 2010; Published: 1 October 2010
KEYWORDS
Apis cerana
Apis mellifera
temperature
Vespa velutina
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