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Behavioral Ecology doi:10.1093/beheco/arr097

Summary: Behavioral Ecology
Advance Access publication 22 June 2011
Original Article
The cost of mating and mutual mate choice in 2
role­reversed honey locust beetles
Yassaman Salehialavi, Karoline Fritzsche, and Go¨ran Arnqvist
Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, University of
Uppsala, Norbyva¨gen 18D, SE-752 36 Uppsala, Sweden
Situations where both males and females simultaneously exercise mate choice may be much more common than previously
believed. Yet, experimental studies of mutual mate choice are rare as is information on the types of female traits that are favored
by male mate choice. We first assessed the cost of mating to males under different feeding regimes in 2 honey locust beetles
(Bruchidae, Megabruchidius spp.) where females actively search for and court males. Further, in a series of mate choice trials, we
manipulated female mating status and male food provisioning to assess how male and female characteristics affected the out-
come of male­female interactions. Mating carried substantial costs to males, but these costs were independent of food availability.
Males generally showed a preference for large females but also for females that delivered a more vigorous courtship display.
Moreover, males preferred virgin females in one species but nonvirgin females in the other species, and we provide data
suggesting that this choice is adaptive. Female choice was restricted to a lower rate of female mate rejection of larger males
in one of the species. Our results reveal a striking interspecific variation in mutual mate choice, even between these closely
related species, and show that sexual selection in females can act on much the same types of traits that are commonly considered


Source: Arnqvist, Göran - Department of Animal Ecology, Uppsala Universitet


Collections: Environmental Sciences and Ecology