Phylogeography and species delimitation of Cherax destructor (Decapoda Parastacidae) using genome-wide SNPs

P. J. Unmack, M. J. Young, B. Gruber, D. White, A. Kilian, X. Zhang, A. Georges

Research output: Contribution to journalArticle

Abstract

Cherax is a genus of 58 species of decapod crustaceans that are widespread across Australia and New Guinea. We use single-nucleotide polymorphisms (SNPs) to examine phylogeographic patterns in the most widespread species of Cherax, namely, C. destructor, and test the distinctiveness of one undescribed species, two C. destructor subspecies, previously proposed evolutionarily significant units, and management units. Both the phylogenetic analyses and the analysis of fixed allelic differences between populations support the current species-level taxonomy of C. setosus, C. depressus, C. dispar and C. destructor, the distinctiveness of C. destructor albidus and C. d. destructor and the existence of one undescribed species. The two populations of C. d. albidus from the Glenelg and Wimmera rivers were significantly distinct, with eight diagnostic differences (<1% fixed differences, null expectation is four fixed differences), but this low level of divergence is interpreted as within the range that might be expected of management units, that is, among allopatric populations of a single species or subspecies. A southern clade of C. d. destructor comprising the Murray River and its tributaries upstream from its confluence with the Darling River is genetically distinct from a northern clade comprising populations from the Lake Eyre Basin, the northern half of the Murray-Darling Basin (Darling River catchment) and the Lower Murray River below the Darling confluence.

LanguageEnglish
Pages1-13
Number of pages13
JournalMarine and Freshwater Research
DOIs
Publication statusE-pub ahead of print - 2019

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Cherax destructor
Parastacidae
phylogeography
Decapoda
single nucleotide polymorphism
polymorphism
Cherax
genome
rivers
confluence
river
subspecies
allopatry
New Guinea
Crustacea
taxonomy
crustacean
tributary
phylogeny
river basin

Cite this

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title = "Phylogeography and species delimitation of Cherax destructor (Decapoda Parastacidae) using genome-wide SNPs",
abstract = "Cherax is a genus of 58 species of decapod crustaceans that are widespread across Australia and New Guinea. We use single-nucleotide polymorphisms (SNPs) to examine phylogeographic patterns in the most widespread species of Cherax, namely, C. destructor, and test the distinctiveness of one undescribed species, two C. destructor subspecies, previously proposed evolutionarily significant units, and management units. Both the phylogenetic analyses and the analysis of fixed allelic differences between populations support the current species-level taxonomy of C. setosus, C. depressus, C. dispar and C. destructor, the distinctiveness of C. destructor albidus and C. d. destructor and the existence of one undescribed species. The two populations of C. d. albidus from the Glenelg and Wimmera rivers were significantly distinct, with eight diagnostic differences (<1{\%} fixed differences, null expectation is four fixed differences), but this low level of divergence is interpreted as within the range that might be expected of management units, that is, among allopatric populations of a single species or subspecies. A southern clade of C. d. destructor comprising the Murray River and its tributaries upstream from its confluence with the Darling River is genetically distinct from a northern clade comprising populations from the Lake Eyre Basin, the northern half of the Murray-Darling Basin (Darling River catchment) and the Lower Murray River below the Darling confluence.",
author = "Unmack, {P. J.} and Young, {M. J.} and B. Gruber and D. White and A. Kilian and X. Zhang and A. Georges",
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T1 - Phylogeography and species delimitation of Cherax destructor (Decapoda Parastacidae) using genome-wide SNPs

AU - Unmack, P. J.

AU - Young, M. J.

AU - Gruber, B.

AU - White, D.

AU - Kilian, A.

AU - Zhang, X.

AU - Georges, A.

PY - 2019

Y1 - 2019

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AB - Cherax is a genus of 58 species of decapod crustaceans that are widespread across Australia and New Guinea. We use single-nucleotide polymorphisms (SNPs) to examine phylogeographic patterns in the most widespread species of Cherax, namely, C. destructor, and test the distinctiveness of one undescribed species, two C. destructor subspecies, previously proposed evolutionarily significant units, and management units. Both the phylogenetic analyses and the analysis of fixed allelic differences between populations support the current species-level taxonomy of C. setosus, C. depressus, C. dispar and C. destructor, the distinctiveness of C. destructor albidus and C. d. destructor and the existence of one undescribed species. The two populations of C. d. albidus from the Glenelg and Wimmera rivers were significantly distinct, with eight diagnostic differences (<1% fixed differences, null expectation is four fixed differences), but this low level of divergence is interpreted as within the range that might be expected of management units, that is, among allopatric populations of a single species or subspecies. A southern clade of C. d. destructor comprising the Murray River and its tributaries upstream from its confluence with the Darling River is genetically distinct from a northern clade comprising populations from the Lake Eyre Basin, the northern half of the Murray-Darling Basin (Darling River catchment) and the Lower Murray River below the Darling confluence.

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