Polyandrous females found fitter populations

dc.contributor.authorPower, Daniel
dc.contributor.authorHolman, Luke
dc.date.accessioned2015-12-13T22:31:10Z
dc.date.issued2014
dc.date.updated2015-12-11T08:59:28Z
dc.description.abstractMultiple mating by females (polyandry) requires an evolutionary explanation, because it carries fitness costs in many species. When mated females disperse alone to a new habitat, their offspring may have no option but to mate with their siblings and incur inbreeding depression. However, some of the offspring of polyandrous females may only be half siblings, reducing inbreeding depression when isolated groups of siblings only have each other as mates. We investigated this putative benefit of polyandry over monandry by initiating multiple genetically isolated populations of Callosobruchus maculatus beetles, each founded by a single female, who received a complete ejaculate from either one or two males. The early generations had comparable fitness, but the F4 and F5 descendants of doubly inseminated females were more numerous and had higher egg-to-adult survival than the descendants of singly inseminated females. This fitness benefit was of similar magnitude whether beetles were reared on their standard food plant, or on a less favourable food source. Our results suggest that polyandrous females produce fitter descendants in inbred founder populations and therefore that polyandry may affect movement ecology and invasion biology.
dc.identifier.issn1010-061X
dc.identifier.urihttp://hdl.handle.net/1885/75171
dc.publisherBlackwell Publishing Ltd
dc.sourceJournal of Evolutionary Biology
dc.titlePolyandrous females found fitter populations
dc.typeJournal article
local.bibliographicCitation.issue9
local.bibliographicCitation.lastpage1955
local.bibliographicCitation.startpage1948
local.contributor.affiliationPower, Daniel, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationHolman, Luke, College of Medicine, Biology and Environment, ANU
local.contributor.authoremailu5091741@anu.edu.au
local.contributor.authoruidPower, Daniel, u4849853
local.contributor.authoruidHolman, Luke, u5091741
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor060201 - Behavioural Ecology
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
local.identifier.ariespublicationU3488905xPUB4499
local.identifier.citationvolume27
local.identifier.doi10.1111/jeb.12448
local.identifier.scopusID2-s2.0-84906794036
local.identifier.thomsonID000341577300019
local.identifier.uidSubmittedByU3488905
local.type.statusPublished Version

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