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Population genetic studies on the Australian freshwater crayfish, Cherax destructor (Crustacea: Parastacidae) using allozyme and RAPD markers
journal contribution
posted on 2023-05-17, 18:35 authored by Nguyen, TTT, Christopher BurridgeChristopher Burridge, Austin, CMAllozyme and Random Amplified Polymorphic DNA (RAPD) variation was surveyed in the freshwater crayfish Cherax destructor Clark, an ecologically and commercially important species that is widespread throughout the freshwater systems of central Australia. At the intra-population level, allozymes revealed a similar level of variation to that found in other freshwater crayfish; RAPDs showed less diversity than allozymes, which was unexpected. At the inter-population level, both techniques revealed significant population structure, both within and between drainages. RAPD results were consistent with phylogeographic patterns previously identified using mtDNA. Although allozyme data showed little geographic pattern in relation to genetic variation based on multidimensional-scaling (MDS) plots on matrices of genetic distance, results of AMOVA and Mantel tests indicated significant population structuring. Each of the mtDNA lineages proposed in a previous study also showed significant genetic structure at similar levels as revealed by RAPDs but different levels by allozymes. These results reject hypotheses previously put forward on genetic homogenisation within the species due to wide-scale translocation. The implications of the findings for conservation and aquaculture of C. destructor are also discussed.
History
Publication title
Aquatic Living Resources: International Journal Devoted to Aquatic ResourcesVolume
18Pagination
55-64ISSN
0990-7440Department/School
School of Natural SciencesPublisher
Cambridge University PressPlace of publication
23 Rue Linois, Paris, France, 75015Rights statement
Copyright 2005 EDP Sciences, IFREMER, IRDRepository Status
- Restricted