The molecular systematics of Leiopotherapon unicolor (Günther, 1859): testing for cryptic speciation in Australia’s most widespread freshwater fish

Bostock, B.M., Adams, M., Laurenson, Laurie and Austin, Christopher 2006, The molecular systematics of Leiopotherapon unicolor (Günther, 1859): testing for cryptic speciation in Australia’s most widespread freshwater fish, Biological journal of the linnean society, vol. 87, no. 4, pp. 537-552.

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Title The molecular systematics of Leiopotherapon unicolor (Günther, 1859): testing for cryptic speciation in Australia’s most widespread freshwater fish
Formatted title Molecular systematics of Leiopotherapon unicolor (Günther, 1859): testing for cryptic speciation in Australia’s most widespread freshwater fish
Author(s) Bostock, B.M.
Adams, M.
Laurenson, Laurie
Austin, Christopher
Journal name Biological journal of the linnean society
Volume number 87
Issue number 4
Start page 537
End page 552
Publisher Linnean Society of London
Place of publication London, England
Publication date 2006-04-18
ISSN 0024-4066
1095-8312
Keyword(s) 16S rRNA
allozyme electrophoresis
Australia
biogeography
cryptic speciation
lack of divergence
mtDNA
Summary Leiopotherapon unicolor is the most widespread freshwater fish species in Australia. A comprehensive allozyme and mitochondrial DNA 16S rRNA data set was assembled from 141 specimens of L. unicolor collected Australia-wide in order to test for cryptic speciation in this far-ranging species. Surprisingly, little genetic diversity was observed within L. unicolor and provided no evidence for the existence of cryptic species within this lineage. In contrast, a small sample set of L. aheneus used as the outgroup showed two highly divergent haplotypes strongly suggestive of cryptic speciation. L. unicolor has a number of ecological and life history attributes that may explain the lack of significant genetic divergence over substantial geographical distances. The occurrence of other widespread fish and crustacean species that also display only limited genetic diversity indicate that climate conditions more favourable to dispersal across central and northern Australia than is suggested by the extent of present-day aridity have occurred in the relatively recent geological past.
Language eng
Field of Research 060409 Molecular Evolution
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, The Linnean Soiety of London
Persistent URL http://hdl.handle.net/10536/DRO/DU:30004054

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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