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Allozyme evidence for a new species of freshwater crayfish of the genus Cherax Erichson (Decapoda : Parastacidae) from the south-west of Western Australia

Austin, Christopher and Ryan, S.G. 2002, Allozyme evidence for a new species of freshwater crayfish of the genus Cherax Erichson (Decapoda : Parastacidae) from the south-west of Western Australia, Invertebrate systematics, vol. 16, no. 3, pp. 357-367, doi: 10.1071/IT01010.

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Title Allozyme evidence for a new species of freshwater crayfish of the genus Cherax Erichson (Decapoda : Parastacidae) from the south-west of Western Australia
Formatted title Allozyme evidence for a new species of freshwater crayfish of the genus Cherax Erichson (Decapoda : Parastacidae) from the south-west of Western Australia
Author(s) Austin, ChristopherORCID iD for Austin, Christopher orcid.org/0000-0003-1848-6267
Ryan, S.G.
Journal name Invertebrate systematics
Volume number 16
Issue number 3
Start page 357
End page 367
Publisher CSIRO
Place of publication Melbourne, Vic.
Publication date 2002
ISSN 1445-5226
1447-2600
Summary The marron, Cherax tenuimanus (Smith), is one of the most easily recognisable members of the freshwater crayfish genus Cherax. Since its description in 1912, the taxonomy of the species has not been in dispute, but recent genetic studies have demonstrated that the species is not homogenous and consists of two genetically distinct forms. One of these forms is widespread and exploited via aquaculture and the other is restricted to a single river system, the Margaret River. This paper presents allozyme data, collected over a 19-year period, which documents the introduction of the widespread form into the Margaret River and the subsequent reproductive interactions between the two forms. These data indicate minimal interbreeding between the two forms of marron and so justify their recognition as distinct species. As the original description of the marron was based on specimens collected from the Margaret River, the form native to this river retains the name C. tenuimanus and a new species, Cherax cainii Austin is described for the common, widespread form of marron. An additional outcome of this study is that C. tenuimanus has been rapidly displaced by the introduced C. cainii within the Margaret River. Consequently, urgent conservation measures are required to protect C. tenuimanus and prevent its possible extinction.
Language eng
DOI 10.1071/IT01010
Field of Research 070405 Fish Physiology and Genetics
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, CSIRO
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001500

Document type: Journal Article
Collection: School of Ecology and Environment
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