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Sexual conflict in twins: Male co-twins reduce fitness of female Soay sheep

Korsten, Peter; Clutton-Brock, Tim H; Pilkington, Jill G.; Pemberton, Josephine M; Kruuk, Loeske

Description

Males and females often have different requirements during early development, leading to sex-specific interactions between developing offspring. In polytocous mammals, competition for limited resources in utero may be asymmetrical between the sexes, and androgens produced by male foetuses could have adverse effects on the development of females, with potentially long-lasting consequences. We show here, in an unmanaged population of Soay sheep, that female lambs with a male co-twin have reduced...[Show more]

dc.contributor.authorKorsten, Peter
dc.contributor.authorClutton-Brock, Tim H
dc.contributor.authorPilkington, Jill G.
dc.contributor.authorPemberton, Josephine M
dc.contributor.authorKruuk, Loeske
dc.date.accessioned2015-12-13T22:51:32Z
dc.identifier.issn1744-9561
dc.identifier.urihttp://hdl.handle.net/1885/81132
dc.description.abstractMales and females often have different requirements during early development, leading to sex-specific interactions between developing offspring. In polytocous mammals, competition for limited resources in utero may be asymmetrical between the sexes, and androgens produced by male foetuses could have adverse effects on the development of females, with potentially long-lasting consequences. We show here, in an unmanaged population of Soay sheep, that female lambs with a male co-twin have reduced birth weight relative to those with a female co-twin, while there was no such effect in male twins. In addition, females with a male co-twin had lower lifetime breeding success, which appeared to be mainly driven by differences in first-year survival. These results show that sex-specific sibling interactions can have long-term consequences for survival and reproduction, with potentially important implications for optimal sex allocation.
dc.publisherRoyal Society of London
dc.sourceBiology Letters
dc.subjectKeywords: androgen; fitness; masculinization; reproductive success; resource allocation; resource availability; sex allocation; sexual conflict; sheep; sibling; survival; animal experiment; article; birth weight; female; fetus development; intraspecific competition Masculinization; Prenatal hormones; Reproductive success; Sexual conflict; Sibling competition; Twinning
dc.titleSexual conflict in twins: Male co-twins reduce fitness of female Soay sheep
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume5
dc.date.issued2009
local.identifier.absfor060308 - Life Histories
local.identifier.ariespublicationf5625xPUB9479
local.type.statusPublished Version
local.contributor.affiliationKorsten, Peter, University of Edinburgh
local.contributor.affiliationClutton-Brock, Tim H, University of Cambridge
local.contributor.affiliationPilkington, Jill G., University of Edinburgh
local.contributor.affiliationPemberton, Josephine M, University of Edinburgh
local.contributor.affiliationKruuk, Loeske, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue5
local.bibliographicCitation.startpage663
local.bibliographicCitation.lastpage666
local.identifier.doi10.1098/rsbl.2009.0366
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2016-02-24T09:45:37Z
local.identifier.scopusID2-s2.0-70349293714
local.identifier.thomsonID000269699300026
CollectionsANU Research Publications

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