Abstract
Most species of social insects have singly mated queens, although there are notable exceptions. Competing hypotheses have been proposed to explain the evolution of high levels of multiple mating, but this issue is far from resolved. Here we use microsatellites to investigate mating frequency in the army ant Eciton burchellii and show that queens mate with an exceptionally large number of males, eclipsing all but one other social insect species for which data are available. In addition we present evidence that suggests that mating is serial, continuing throughout the lifetime of the queen. This is the first demonstration of serial mating among social hymenoptera. We propose that high paternity within colonies is most likely to have evolved to increase genetic diversity and to counter high pathogen and parasite loads.
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Acknowledgements
We would like to thank N.E.R.C. for funding this project (grant no. NER/B/S/2002/00225). Scott Powell was supported by an N.E.R.C. CASE studentship and The Smithsonian Tropical Research Institute. Three anonymous referees helped to improve the manuscript.
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Denny, A.J., Franks, N.R., Powell, S. et al. Exceptionally high levels of multiple mating in an army ant. Naturwissenschaften 91, 396–399 (2004). https://doi.org/10.1007/s00114-004-0546-4
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DOI: https://doi.org/10.1007/s00114-004-0546-4