The costs and benefits of multiple mating in a mostly monandrous wasp

Evolution; International Journal of Organic Evolution
Rebecca A Boulton, D M Shuker

Abstract

The taxonomically widespread nature of polyandry remains a puzzle. Much of the empirical work regarding the costs and benefits of multiple mating to females has, for obvious reasons, relied on species that are already highly polyandrous. However, this makes it difficult to separate the processes that maintain the current level of polyandry from the processes that facilitate its expression and initiated its evolution. Here we consider the costs and benefits of polyandry in Nasonia vitripennis, a species of parasitoid wasp that is "mostly monandrous" in the wild, but which evolves polyandry under laboratory culture conditions. In a series of six experiments, we show that females gain a direct fecundity and longevity benefit from mating multiply with virgin males. Conversely, mating multiply with previously mated males actually results in a fecundity cost. Sexual harassment may also represent a significant cost of reproduction. Harassment was, however, only costly during oviposition, resulting in reduced fecundity, longevity, and disrupted sex allocation. Our results show that ecological changes, in our case associated with differences in the local mating structure in the laboratory can alter the costs and benefits of mating and h...Continue Reading

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Citations

Jun 5, 2015·Biology Letters·Rebecca A Boulton, David M Shuker
Aug 27, 2016·BMC Evolutionary Biology·Rainer Neumann, Jutta M Schneider
May 17, 2018·Evolution; International Journal of Organic Evolution·Maartje LieftingJacintha Ellers
Dec 25, 2019·The Journal of Animal Ecology·Leonor R RodriguesSara Magalhães
Aug 26, 2020·Sensors·Sergio TerranovaSimone Genovesi
Jul 6, 2020·Scientific Reports·Noriyosi SatoNoritaka Hirohashi
Jan 16, 2021·The Journal of Heredity·Tyler A BrownMercedes Burns

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