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dc.contributor.authorFrentiu, FD
dc.contributor.authorClegg, SM
dc.contributor.authorBlows, MW
dc.contributor.authorOwens, IPF
dc.date.accessioned2017-05-03T15:53:31Z
dc.date.available2017-05-03T15:53:31Z
dc.date.issued2007
dc.date.modified2011-05-30T06:56:33Z
dc.identifier.issn1010-061X
dc.identifier.doi10.1111/j.1420-9101.2006.01242.x
dc.identifier.urihttp://hdl.handle.net/10072/38873
dc.description.abstractIsland races of passerine birds display repeated evolution towards larger body size compared with their continental ancestors. The Capricorn silvereye (Zosterops lateralis chlorocephalus) has become up to six phenotypic standard deviations bigger in several morphological measures since colonization of an island approximately 4000 years ago. We estimated the genetic variance-covariance (G) matrix using full-sib and 'animal model' analyses, and selection gradients, for six morphological traits under field conditions in three consecutive cohorts of nestlings. Significant levels of genetic variance were found for all traits. Significant directional selection was detected for wing and tail lengths in one year and quadratic selection on culmen depth in another year. Although selection gradients on many traits were negative, the predicted evolutionary response to selection of these traits for all cohorts was uniformly positive. These results indicate that the G matrix and predicted evolutionary responses are consistent with those of a population evolving in the manner observed in the island passerine trend, that is, towards larger body size.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_AU
dc.publisherWiley-Blackwell Publishing Ltd.
dc.publisher.placeUnited Kingdom
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom639
dc.relation.ispartofpageto649
dc.relation.ispartofissue2
dc.relation.ispartofjournalJournal of Evolutionary Biology
dc.relation.ispartofvolume20
dc.rights.retentionY
dc.subject.fieldofresearchQuantitative Genetics (incl. Disease and Trait Mapping Genetics)
dc.subject.fieldofresearchBiological Adaptation
dc.subject.fieldofresearchEvolutionary Biology
dc.subject.fieldofresearchZoology
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchcode060412
dc.subject.fieldofresearchcode060303
dc.subject.fieldofresearchcode0603
dc.subject.fieldofresearchcode0608
dc.subject.fieldofresearchcode0602
dc.titleLarge body size in an island-dwelling bird: a microevolutionary analysis
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2007
gro.hasfulltextNo Full Text
gro.griffith.authorClegg, Sonya


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