Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/22910
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dc.contributor.authorHayward, Adamen_UK
dc.contributor.authorWilson, Alastair Jen_UK
dc.contributor.authorPilkington, Jill Gen_UK
dc.contributor.authorPemberton, Josephine Men_UK
dc.contributor.authorKruuk, Loeske E Ben_UK
dc.date.accessioned2016-03-08T23:42:43Z-
dc.date.available2016-03-08T23:42:43Z-
dc.date.issued2009-10en_UK
dc.identifier.urihttp://hdl.handle.net/1893/22910-
dc.description.abstractDespite widespread empirical evidence for a general deterioration in the majority of traits with advancing age, it is unclear whether the progress of senescence is chronologically determined, or whether factors such as environmental conditions experienced over the lifespan are more important. We explored the relative importance of ‘chronological’ and ‘environmental’ measures of age to changes in parasite resistance across the lifespan of free-living Soay sheep. Our results show that individuals experience an increase in parasite burden, as indicated by gastrointestinal helminth faecal egg count (FEC) with chronological age. However, chronological age fails to fully explain changes in FEC because a measure of environmental age, cumulative environmental stress, predicts an additional increase in FEC once chronological age has been accounted for. Additionally, we show that in females age-specific changes are dependent upon the environmental conditions experienced across individuals' life histories: increases in FEC with age were greatest among individuals that had experienced the highest degree of stress. Our results illustrate that chronological age alone may not always correspond to biological age, particularly in variable environments. In these circumstances, measures of age that capture the cumulative stresses experienced by an individual may be useful for understanding the process of senescence.en_UK
dc.language.isoenen_UK
dc.publisherThe Royal Societyen_UK
dc.relationHayward A, Wilson AJ, Pilkington JG, Pemberton JM & Kruuk LEB (2009) Ageing in a variable habitat: environmental stress affects senescence in parasite resistance in St Kilda Soay sheep. Proceedings of the Royal Society B: Biological Sciences, 276 (1672), pp. 3477-3485. https://doi.org/10.1098/rspb.2009.0906en_UK
dc.rights© 2009 The Royal Society This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_UK
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_UK
dc.subjectageingen_UK
dc.subjectenvironmental dependenceen_UK
dc.subjectstrongyle helminthsen_UK
dc.subjectSoay sheepen_UK
dc.subjectimmunosenescenceen_UK
dc.subjectfaecal egg countsen_UK
dc.titleAgeing in a variable habitat: environmental stress affects senescence in parasite resistance in St Kilda Soay sheepen_UK
dc.typeJournal Articleen_UK
dc.identifier.doi10.1098/rspb.2009.0906en_UK
dc.identifier.pmid19586947en_UK
dc.citation.jtitleProceedings of the Royal Society B: Biological Sciencesen_UK
dc.citation.issn1471-2954en_UK
dc.citation.issn0962-8452en_UK
dc.citation.volume276en_UK
dc.citation.issue1672en_UK
dc.citation.spage3477en_UK
dc.citation.epage3485en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.author.emailadam.hayward@stir.ac.uken_UK
dc.citation.date25/08/2009en_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationUniversity of Edinburghen_UK
dc.contributor.affiliationUniversity of Edinburghen_UK
dc.contributor.affiliationUniversity of Edinburghen_UK
dc.contributor.affiliationUniversity of Edinburghen_UK
dc.identifier.isiWOS:000269241300011en_UK
dc.identifier.scopusid2-s2.0-70349612501en_UK
dc.identifier.wtid577066en_UK
dc.contributor.orcid0000-0001-6953-7509en_UK
dc.date.accepted2009-06-18en_UK
dcterms.dateAccepted2009-06-18en_UK
dc.date.filedepositdate2016-03-04en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorHayward, Adam|0000-0001-6953-7509en_UK
local.rioxx.authorWilson, Alastair J|en_UK
local.rioxx.authorPilkington, Jill G|en_UK
local.rioxx.authorPemberton, Josephine M|en_UK
local.rioxx.authorKruuk, Loeske E B|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2016-03-04en_UK
local.rioxx.licencehttp://creativecommons.org/licenses/by/4.0/|2016-03-04|en_UK
local.rioxx.filenamePRSB_2009_Kruuk.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0962-8452en_UK
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