Biogeographic models of gene flow in two waterfowl of the australo-papuan tropics

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dc.contributor.authorRoshier, D.A.
dc.contributor.authorHeinsohn, R.
dc.contributor.authorAdcock, G.J.
dc.contributor.authorBeerli, P.
dc.contributor.authorJoseph, L.
dc.date.issued2012
dc.description.abstractThere are many large, easy-to-observe anseriform birds (ducks, geese, and swans) in northern Australia and New Guinea and they often gather in large numbers. Yet, the structure of their populations and their regional movements are poorly understood. Lack of understanding of population structure limits our capacity to understand source-sink dynamics relevant to their conservation or assess risks associated with avian-borne pathogens, in particular, avian influenza for which waterfowl are the main reservoir species. We set out to assess present-day genetic connectivity between populations of two widely distributed waterfowl in the Australo-Papuan tropics, magpie goose Anseranas semipalmata (Latham, 1798) and wandering whistling-duck Dendrocygna arcuata (Horsfield, 1824). Microsatellite data were obtained from 237 magpie geese and 64 wandering whistling-duck. Samples were collected across northern Australia, and at one site each in New Guinea and Timor Leste. In the wandering whistling-duck, genetic diversity was significantly apportioned by region and sampling location. For this species, the best model of population structure was New Guinea as the source population for all other populations. One remarkable result for this species was genetic separation of two flocks sampled contemporaneously on Cape York Peninsula only a few kilometers apart. In contrast, evidence for population structure was much weaker in the magpie goose, and Cape York as the source population provided the best fit to the observed structure. The fine scale genetic structure observed in wandering whistling-duck and magpie goose is consistent with earlier suggestions that the west-coast of Cape York Peninsula is a flyway for Australo-Papuan anseriforms between Australia and New Guinea across Torres Strait.
dc.description.statementofresponsibilityDavid A. Roshier, Robert Heinsohn, Gregory J. Adcock, Peter Beerli, Leo Joseph
dc.identifier.citationEcology and Evolution, 2012; 2(11):2803-2814
dc.identifier.doi10.1002/ece3.393
dc.identifier.issn2045-7758
dc.identifier.issn2045-7758
dc.identifier.orcidRoshier, D.A. [0000-0002-8151-8447]
dc.identifier.urihttps://hdl.handle.net/2440/133571
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/LP0775076
dc.rights© 2012 The Authors. Ecology and Evolution published by Blackwell Publishing Ltd. This is an open access article under the term s of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.source.urihttps://doi.org/10.1002/ece3.393
dc.subjectAnseriforms; genetic connectivity; Papua New Guinea; Australia
dc.titleBiogeographic models of gene flow in two waterfowl of the australo-papuan tropics
dc.typeJournal article
pubs.publication-statusPublished

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