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Intersexual correlation for same-sex sexual behaviour in an insect
Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
Department of Evolutionary Biology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.ORCID iD: 0000-0001-6112-9586
Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
2013 (English)In: Animal Behaviour, ISSN 0003-3472, E-ISSN 1095-8282, Vol. 85, no 4, p. 759-762Article in journal (Refereed) Published
Abstract [en]

Same-sex sexual behaviour is widespread across taxa and is particularly common in insects, in which up to 50% of copulation attempts by males are directed towards other males in some species. Research effort has focused on male-male same-sex behaviour and the prevailing theory is that benefits of high mating rate combined with poor sex discrimination explain the high incidence of male-male mounting. However, the evolution of female-female mounting is more enigmatic, since females typically do not mount males in order to mate. Using a full-sib design, we found an intersexual correlation for same-sex mounting in the beetle Callosobruchus maculatus. Variation in male-male mounting across families explained over 20% of variation in female-female mounting. Moreover, we found no evidence that same-sex behaviour was related to general activity level in either sex or carried a fitness cost to females. Taken together, our results suggest that female-female mounting is a relatively low-cost behaviour that may be maintained in the population via selection on males.

Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 85, no 4, p. 759-762
Keywords [en]
Callosobruchus maculatus, homosexuality, male-female coevolution, mating behaviour, seed beetle, sexual selection
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-137215DOI: 10.1016/j.anbehav.2013.01.017ISI: 000316726900010OAI: oai:DiVA.org:liu-137215DiVA, id: diva2:1094317
Available from: 2013-05-02 Created: 2017-05-09Bibliographically approved

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