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A genetic investigation on translocation of Australian commercial freshwater crayfish, Cherax destructor

Published online by Cambridge University Press:  15 November 2005

T. T. T. Nguyen
T. T. T. Nguyen*
Affiliation:
School of Ecology and Environment, Deakin University, Warrnambool, VIC 3280, Australia
*
thuy.nguyen@enaca.org
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Abstract

The Australian freshwater crayfish, Cherax destructor is cultured commercially and has been translocated throughout much of Australia. Previous investigation on C. destructor using 16S rRNA sequences of samples collected from natural environments has revealed a significant phylogeographic structure in this species with three well supported geographically non-overlapping clades, namely ‘northern’ C. d. destructor, ‘southern’ C. d. destructor and C. d. albidus. Movement of individuals beyond their natural range of distribution may have adverse effects on genetic integrity of the species. In the present study, aspects of translocations of the species were genetically investigated. Sequences of the 16S rRNA gene region of the mitochondrial DNA (mtDNA) were obtained from samples collected in nine quasi-natural waterbodies, supplemented with sequences of samples obtained from 31 natural waterbodies examined in a previous study. Results of phylogeographic analysis provide evidence that certain haplotypes from major clades of C. destructor have been translocated. The findings of this study have important implications for the conservation and management of genetic diversity within C. destructor.

Keywords

Cherax destructorFreshwater crayfishTranslocationConservation16S rRNA
Type
Research Article
Information
Aquatic Living Resources , Volume 18 , Issue 3 , July 2005 , pp. 319 - 323
Copyright
© EDP Sciences, IFREMER, IRD, 2005

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