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dc.contributor.authorHuey, Joel A
dc.contributor.authorBalcombe, Stephen R
dc.contributor.authorReal, Kathryn M
dc.contributor.authorSternberg, David
dc.contributor.authorHughes, Jane M
dc.date.accessioned2017-07-25T12:30:35Z
dc.date.available2017-07-25T12:30:35Z
dc.date.issued2017
dc.identifier.issn2161-9549
dc.identifier.doi10.1086/690557
dc.identifier.urihttp://hdl.handle.net/10072/342193
dc.description.abstractUpland freshwater habitats support populations that are especially susceptible to anthropogenic change. Furthermore, their isolation from other suitable habitats, and the fragmented, dendritic structure of headwaters make dispersal an unlikely response to change. We investigated genetic structure and variation in the northern-most population of Gadopsis marmoratus, which is isolated in a tiny area in the headwaters of the Condamine River catchment, in the Murray–Darling Basin, Australia. Strong genetic structure was detected among subpopulations based on microsatellites (FST = 0.173, p < 0.0001) and mitochondrial (mt)DNA (FST = 0.369, p < 0.05). Effective population size was low, ranging between 18.8 and 48.2, depending on the estimation method used. Bayesian clustering revealed 3 genetic clusters, but they were not congruent with drainage patterns, suggesting a complex history of dispersal among headwaters that are isolated by waterfalls. Overall, these results suggest that G. marmoratus is unlikely to disperse into new habitats if local conditions become unsuitable. Low effective population size and genetic diversity also suggest that local adaptation would be unlikely.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherUniversity of Chicago Press
dc.relation.ispartofpagefrom113
dc.relation.ispartofpageto123
dc.relation.ispartofissue1
dc.relation.ispartofjournalFreshwater Science
dc.relation.ispartofvolume36
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchFreshwater ecology
dc.subject.fieldofresearchOther biological sciences
dc.subject.fieldofresearchcode3103
dc.subject.fieldofresearchcode310304
dc.subject.fieldofresearchcode3199
dc.titleGenetic structure and effective population size of the most northern population of the Australian River Blackfish, Gadopsis marmoratus (Richardson 1848): Implications for long-term population viability
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionVersion of Record (VoR)
gro.facultyGriffith Sciences, Griffith Institute for Drug Discovery
gro.rights.copyright© 2017 North American Benthological Society. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorHughes, Jane M.


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