Sexual selection drives the coevolution of male and female reproductive traits in Peromyscus mice

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dc.contributor.authorWeber, William David
dc.contributor.authorFisher, Heidi S.
dc.date.accessioned2023-10-03T16:35:49Z
dc.date.available2023-10-03T16:35:49Z
dc.date.issued2022-12-08
dc.description.abstractWhen females mate with multiple partners within a single reproductive cycle, sperm from rival males may compete for fertilization of a limited number of ova, and females may bias the fertilization of their ova by particular sperm. Over evolutionary timescales, these two forms of selection shape both male and female reproductive physiology when females mate multiply, yet in monogamous systems, post-copulatory sexual selection is weak or absent. Here, we examine how divergent mating strategies within a genus of closely related mice, Peromyscus, have shaped the evolution of reproductive traits. We show that in promiscuous species, males exhibit traits associated with increased sperm production and sperm swimming performance, and females exhibit traits that are predicted to limit sperm access to their ova including increased oviduct length and a larger cumulus cell mass surrounding the ova, compared to monogamous species. Importantly, we found that across species, oviduct length and cumulus cell density are significantly correlated with sperm velocity, but not sperm count or relative testes size, suggesting that these female traits may have coevolved with increased sperm quality rather than quantity. Taken together, our results highlight how male and female traits evolve in concert and respond to changes in the level of post-copulatory sexual selection.
dc.description.urihttps://doi.org/10.1111/jeb.14126
dc.identifierhttps://doi.org/10.13016/dspace/iabf-fy5i
dc.identifier.citationWeber, W. D., & Fisher, H. S. (2023). Sexual selection drives the coevolution of male and female reproductive traits in Peromyscus mice. Journal of Evolutionary Biology, 36, 67–81.
dc.identifier.urihttp://hdl.handle.net/1903/30647
dc.language.isoen_US
dc.publisherWiley
dc.relation.isAvailableAtCollege of Computer, Mathematical & Physical Sciencesen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtBiologyen_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.subjectcryptic female choice
dc.subjectmammals
dc.subjectsexual conflicts
dc.subjectsexual selection
dc.subjectsperm competition
dc.titleSexual selection drives the coevolution of male and female reproductive traits in Peromyscus mice
dc.typeArticle
local.equitableAccessSubmissionNo

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