Natural selection on a measure of parasite resistance varies across ages and environmental conditions in a wild mammal

Simple item page
dc.contributor.authorHayward, Adam D.
dc.contributor.authorWilson, Alastair J.
dc.contributor.authorPilkington, Jill G.
dc.contributor.authorClutton-Brock, Tim H
dc.contributor.authorPemberton, Josephine M
dc.contributor.authorKruuk, Loeske
dc.date.accessioned2015-12-13T22:50:27Z
dc.date.issued2011
dc.date.updated2016-02-24T09:44:51Z
dc.description.abstractParasites detrimentally affect host fitness, leading to expectations of positive selection on host parasite resistance. However, as immunity is costly, host fitness may be maximized at low, but nonzero, parasite infection intensities. These hypotheses are rarely tested on natural variation in free-living populations. We investigated selection on a measure of host parasite resistance in a naturally regulated Soay sheep population using a longitudinal data set and found negative correlations between parasite infection intensity and annual fitness in lambs, male yearlings and adult females. However, having accounted for confounding effects of body weight, the effect was only significant in lambs. Associations between fitness and parasite resistance were environment-dependent, being strong during low-mortality winters, but negligible during harsher high-mortality winters. There was no evidence for stabilizing selection. Our findings reveal processes that may shape variation in parasite resistance in natural populations and illustrate the importance of accounting for correlated traits in selection analysis.
dc.identifier.issn1010-061X
dc.identifier.urihttp://hdl.handle.net/1885/80784
dc.publisherBlackwell Publishing Ltd
dc.sourceJournal of Evolutionary Biology
dc.subjectKeywords: data set; egg; fitness; host-parasite interaction; immunity; life history trait; mortality; natural selection; parasite infestation; parasitic disease; sheep; wild population; age; animal; animal disease; article; body size; feces; female; genetic selecti Faecal egg count; Parasite burden; Soay sheep; Strongyles; Teladorsagia; Trichostrongylus
dc.titleNatural selection on a measure of parasite resistance varies across ages and environmental conditions in a wild mammal
dc.typeJournal article
local.bibliographicCitation.issue8
local.bibliographicCitation.lastpage1676
local.bibliographicCitation.startpage1664
local.contributor.affiliationHayward, Adam D., University of Edinburgh
local.contributor.affiliationWilson, Alastair J., University of Edinburgh
local.contributor.affiliationPilkington, Jill G., University of Edinburgh
local.contributor.affiliationClutton-Brock, Tim H, University of Cambridge
local.contributor.affiliationPemberton, Josephine M, University of Edinburgh
local.contributor.affiliationKruuk, Loeske, College of Medicine, Biology and Environment, ANU
local.contributor.authoremailu5243959@anu.edu.au
local.contributor.authoruidKruuk, Loeske, u5243959
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor060308 - Life Histories
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
local.identifier.ariespublicationf5625xPUB9055
local.identifier.citationvolume24
local.identifier.doi10.1111/j.1420-9101.2011.02300.x
local.identifier.scopusID2-s2.0-79960204618
local.identifier.thomsonID000292699200004
local.identifier.uidSubmittedByf5625
local.type.statusPublished Version

Downloads

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
01_Hayward_Natural_selection_on_a_measure_2011.pdf
Size:
788.06 KB
Format:
Adobe Portable Document Format
Download

Collections

ANU Research Publications

DSpace software copyright © 2002-2024 LYRASIS