Show simple item record

dc.contributor.authorFisher, Heidi
dc.contributor.authorGiomi, L.
dc.contributor.authorHoekstra, Hopi E.
dc.contributor.authorMahadevan, Lakshminarayanan
dc.date.accessioned2014-08-26T16:38:54Z
dc.date.issued2014
dc.identifierQuick submit: 2014-07-10T08:39:37-04:00
dc.identifier.citationFisher, H. S., L. Giomi, H. E. Hoekstra, and L. Mahadevan. 2014. “The Dynamics of Sperm Cooperation in a Competitive Environment.” Proceedings of the Royal Society B: Biological Sciences 281 (1790) (July 16): 20140296.en_US
dc.identifier.issn0962-8452en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:12748669
dc.description.abstractSperm cooperation has evolved in a variety of taxa and is often considered a response to sperm competition, yet the benefit of this form of collective movement remains unclear. Here we use fine-scale imaging and a minimal mathematical model to study sperm aggregation in the rodent genus Peromyscus. We demonstrate that as the number of sperm cells in an aggregate increase, the group moves with more persistent linearity but without increasing speed; this benefit, however, is offset in larger aggregates as the geometry of the group forces sperm to swim against one another. The result is a non-monotonic relationship between aggregate size and average velocity with both a theoretically predicted and empirically observed optimum of 6-7 sperm/aggregate. To understand the role of sexual selection in driving these sperm group dynamics, we compared two sister-species with divergent mating systems and find that sperm of P. maniculatus (highly promiscuous), which have evolved under intense competition, form optimal-sized aggregates more often than sperm of P. polionotus (strictly monogamous), which lack competition. Our combined mathematical and experimental study of coordinated sperm movement reveals the importance of geometry, motion and group size on sperm velocity and suggests how these physical variables interact with evolutionary selective pressures to regulate cooperation in competitive environments.en_US
dc.description.sponsorshipEngineering and Applied Sciencesen_US
dc.description.sponsorshipOrganismic and Evolutionary Biologyen_US
dc.language.isoen_USen_US
dc.publisherThe Royal Societyen_US
dc.relation.isversionofdoi:10.1101/006890en_US
dash.licenseOAP
dc.titleThe Dynamics of Sperm Cooperation in a Competitive Environmenten_US
dc.typeJournal Articleen_US
dc.date.updated2014-07-10T12:39:37Z
dc.description.versionAuthor's Originalen_US
dc.rights.holderHeidi S. Fisher, Luca Giomi, Hopi E. Hoekstra, L. Mahadevan
dc.relation.journalProceedings of the Royal Society B: Biological Sciencesen_US
dash.depositing.authorHoekstra, Hopi E.
dc.date.available2014-08-26T16:38:54Z
dc.identifier.doi10.1101/006890*
dash.contributor.affiliatedFisher, Heidi
dash.contributor.affiliatedHoekstra, Hopi
dash.contributor.affiliatedMahadevan, Lakshminarayanan


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record