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Article: Kin association during brood care in a facultatively social bird: Active discrimination or by-product of partner choice and demography?

TitleKin association during brood care in a facultatively social bird: Active discrimination or by-product of partner choice and demography?
Authors
Keywordskin discrimination
cooperation
relatedness
longevity
kin association
partner choice
fecundity
Issue Date2012
Citation
Molecular Ecology, 2012, v. 21, n. 13, p. 3341-3351 How to Cite?
AbstractIntra-group relatedness does not necessarily imply kin selection, a leading explanation for social evolution. An overlooked mechanism for generating population genetic structure is variation in longevity and fecundity, referred to as individual quality, affecting kin structure and the potential for cooperation. Individual quality also affects choosiness in partner choice, a key process explaining cooperation through direct fitness benefits. Reproductive skew theory predicts that relatedness decreases with increasing group size, but this relationship could also arise because of quality-dependent demography and partner choice, without active kin association. We addressed whether brood-rearing eider (Somateria mollissima) females preferentially associated with kin using a 6-year data set with individuals genotyped at 19 microsatellite loci and tested whether relatedness decreased with increasing female group size. We also determined the relationship between local relatedness and indices of female age and body condition. We further examined whether the level of female intracoalition relatedness differed from background relatedness in any year. As predicted, median female intra-group relatedness decreased with increasing female group size. However, the proportion of related individuals increased with advancing female age, and older females prefer smaller brood-rearing coalitions, potentially producing a negative relationship between group size and relatedness. There were considerable annual fluctuations in the level of relatedness between coalition-forming females, and in 1 year this level exceeded that expected by random association. Thus, both passive and active mechanisms govern kin associations in brood-rearing eiders. Eiders apparently can discriminate between kin, but the benefits of doing so may vary over time. © 2012 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/291349
ISSN
2023 Impact Factor: 4.5
2023 SCImago Journal Rankings: 1.705
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorJaatinen, Kim-
dc.contributor.authorNoreikiene, Kristina-
dc.contributor.authorMerilä, Juha-
dc.contributor.authorÖst, Markus-
dc.date.accessioned2020-11-17T14:54:10Z-
dc.date.available2020-11-17T14:54:10Z-
dc.date.issued2012-
dc.identifier.citationMolecular Ecology, 2012, v. 21, n. 13, p. 3341-3351-
dc.identifier.issn0962-1083-
dc.identifier.urihttp://hdl.handle.net/10722/291349-
dc.description.abstractIntra-group relatedness does not necessarily imply kin selection, a leading explanation for social evolution. An overlooked mechanism for generating population genetic structure is variation in longevity and fecundity, referred to as individual quality, affecting kin structure and the potential for cooperation. Individual quality also affects choosiness in partner choice, a key process explaining cooperation through direct fitness benefits. Reproductive skew theory predicts that relatedness decreases with increasing group size, but this relationship could also arise because of quality-dependent demography and partner choice, without active kin association. We addressed whether brood-rearing eider (Somateria mollissima) females preferentially associated with kin using a 6-year data set with individuals genotyped at 19 microsatellite loci and tested whether relatedness decreased with increasing female group size. We also determined the relationship between local relatedness and indices of female age and body condition. We further examined whether the level of female intracoalition relatedness differed from background relatedness in any year. As predicted, median female intra-group relatedness decreased with increasing female group size. However, the proportion of related individuals increased with advancing female age, and older females prefer smaller brood-rearing coalitions, potentially producing a negative relationship between group size and relatedness. There were considerable annual fluctuations in the level of relatedness between coalition-forming females, and in 1 year this level exceeded that expected by random association. Thus, both passive and active mechanisms govern kin associations in brood-rearing eiders. Eiders apparently can discriminate between kin, but the benefits of doing so may vary over time. © 2012 Blackwell Publishing Ltd.-
dc.languageeng-
dc.relation.ispartofMolecular Ecology-
dc.subjectkin discrimination-
dc.subjectcooperation-
dc.subjectrelatedness-
dc.subjectlongevity-
dc.subjectkin association-
dc.subjectpartner choice-
dc.subjectfecundity-
dc.titleKin association during brood care in a facultatively social bird: Active discrimination or by-product of partner choice and demography?-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-294X.2012.05603.x-
dc.identifier.pmid22568752-
dc.identifier.scopuseid_2-s2.0-84862755283-
dc.identifier.volume21-
dc.identifier.issue13-
dc.identifier.spage3341-
dc.identifier.epage3351-
dc.identifier.eissn1365-294X-
dc.identifier.isiWOS:000305582200020-
dc.identifier.issnl0962-1083-

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