Title |
Thorough warm-up before take-off in honey bee swarms
|
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Published in |
The Science of Nature, May 2003
|
DOI | 10.1007/s00114-003-0425-4 |
Pubmed ID | |
Authors |
Thomas D. Seeley, Marco Kleinhenz, Brigitte Bujok, Jürgen Tautz |
Abstract |
In a bivouacked swarm of honey bees, most individuals are quiescent while a small minority (the scouts) are active in choosing the swarm's future nest site. This study explores the way in which the members of a swarm warm their flight muscles for take-off when the swarm eventually decamps. An infrared camera was used to measure the thoracic (flight muscle) temperatures of individual bees on the surface of a swarm cluster. These are generally the coolest bees in a swarm. The warming of the surface-layer bees occurred mainly in the last 10 min before take-off. By the time a take-off began, 100% of the bees had their flight muscles heated to at least 35 degrees C, which is sufficient to support rapid flight. Take-offs began only a few seconds after all the surface-layer bees had their flight muscles warmed to at least 35 degrees C, but exactly how take-offs are triggered remains a mystery. |
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