Abstract
When colonies of swarm-founding wasps lose their nests to predation or accident, the entire adult population escapes, emigrates as an absconding swarm, and renests elsewhere. Such an event causes a reduction in the adult population due to losses during the emigration itself and to adult attrition without replacement during the subsequent preemergence growth period in the new nest. We addressed the first of these sources of mortality for 27 absconding swarms of Polybia occidentalis in Costa Rica. Adult mortality over the day that included swarm emigration averaged 0.044 ± 0.039 (SD) of the original population and was a weak positive function of distance moved, but not of swarm size. A larger data set showed that emigration distance increased with swarm size. This is the first study to measure mortality rates during emigration in a swarm-founding social insect.
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Bouwma, A.M., Bouwma, P.E., Nordheim, E.V. et al. Founding Swarms in a Tropical Social Wasp: Adult Mortality, Emigration Distance, and Swarm Size. Journal of Insect Behavior 16, 439–452 (2003). https://doi.org/10.1023/A:1024836327936
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DOI: https://doi.org/10.1023/A:1024836327936