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Microsatellite markers and mtDNA data indicate two distinct groups in dwarf galaxias, Galaxiella pusilla (Mack) (Pisces: Galaxiidae), a threatened freshwater fish from south-eastern Australia

Coleman, R.A., Pettigrove, V., Raadik, T.A., Hoffmann, A.A., Miller, A.D. and Carew, M.E. 2010, Microsatellite markers and mtDNA data indicate two distinct groups in dwarf galaxias, Galaxiella pusilla (Mack) (Pisces: Galaxiidae), a threatened freshwater fish from south-eastern Australia, Conservation genetics, vol. 11, no. 5, pp. 1911-1928, doi: 10.1007/s10592-010-0082-z.

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Title Microsatellite markers and mtDNA data indicate two distinct groups in dwarf galaxias, Galaxiella pusilla (Mack) (Pisces: Galaxiidae), a threatened freshwater fish from south-eastern Australia
Formatted title Microsatellite markers and mtDNA data indicate two distinct groups in dwarf galaxias, Galaxiella pusilla (Mack) (Pisces: Galaxiidae), a threatened freshwater fish from south-eastern Australia
Author(s) Coleman, R.A.
Pettigrove, V.
Raadik, T.A.
Hoffmann, A.A.
Miller, A.D.ORCID iD for Miller, A.D. orcid.org/0000-0002-1632-7206
Carew, M.E.
Journal name Conservation genetics
Volume number 11
Issue number 5
Start page 1911
End page 1928
Total pages 18
Publisher Springer
Place of publication Dodrecht, The Netherlands
Publication date 2010-10
ISSN 1566-0621
1572-9737
Keyword(s) Galaxiella pusilla
threatened species
freshwater fish
population genetics
microsatellites
COI
Summary Galaxiella pusilla is a small, non-migratory freshwater fish, endemic to south-eastern Australia and considered nationally threatened. To assist in the conservation of the species, microsatellite markers were developed and used to characterize genetic variation in 20 geographically distinct populations across its range. Substantial genetic differentiation was found between an eastern (Victoria east of the Otway Ranges and Tasmania) and western (South Australia and Victoria west of, and including, the Otway Ranges) region. This major separation was also observed in data from a mitochondrial gene and supports a previously proposed split. Populations from the eastern region had overall lower genetic diversity for both the microsatellite and mtDNA markers. There was substantial genetic differentiation between populations within the two regions, suggesting that gene flow is limited by the isolation of freshwater streams. Genetic structure, consistent with an isolation-by-distance model, was also evident in both regions. Patterns of genetic variation in this threatened species are compared to those obtained for other taxa across the same region. The need to consider separate conservation strategies for the two sets of populations is emphasized.
Language eng
DOI 10.1007/s10592-010-0082-z
Field of Research 060411 Population, Ecological and Evolutionary Genetics
050202 Conservation and Biodiversity
060204 Freshwater Ecology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2010, Springer Science+Business Media B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30088776

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