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Whole mitogenome sequencing refines population structure of the Critically Endangered sawfish Pristis pristis

Feutry, Pierre, Kyne, Peter M., Pillans, Richard D., Chen, Xiao, Marthick, James R., Morgan, David L. and Grewe, Peter M. (2015). Whole mitogenome sequencing refines population structure of the Critically Endangered sawfish Pristis pristis. Marine Ecology: Progress Series,533:237-244.

Document type: Journal Article
Citation counts: Altmetric Score Altmetric Score is 2
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IRMA ID 84376995xPUB240
Title Whole mitogenome sequencing refines population structure of the Critically Endangered sawfish Pristis pristis
Author Feutry, Pierre
Kyne, Peter M.
Pillans, Richard D.
Chen, Xiao
Marthick, James R.
Morgan, David L.
Grewe, Peter M.
Journal Name Marine Ecology: Progress Series
Publication Date 2015
Volume Number 533
ISSN 0171-8630   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-84938948691
Start Page 237
End Page 244
Total Pages 8
Place of Publication Germany
Publisher Inter-Research
Field of Research 0704 - Fisheries Sciences
HERDC Category C1 - Journal Article (DIISR)
Abstract The largetooth sawfish Pristis pristis (Linnaeus, 1758) is a highly threatened euryhaline elasmobranch that in recent times has undergone a significant range contraction. It now only remains in a few areas, with northern Australia being the main stronghold. Previous work using a single mitochondrial gene approach suggested the existence of regional barriers to gene flow in northern Australia. In this study, whole mitochondrial sequences of 92 P. pristis from 7 river drainages across northern Australia were used to refine the population structure. This approach revealed barriers to gene flow at a scale as fine as between adjacent river drainages. Except for those flowing into the Gulf of Carpentaria, all river drainages appeared to host a genetically distinct population. The apparent genetic homogeneity in the Gulf is probably due to freshwater connectivity between river drainages, either during the last glaciation event when the Gulf was a freshwater lake or through contemporary wet season flooding. These results suggest that each river drainage across the species’ range should be considered a discrete management unit unless there is evidence of freshwater connectivity. More broadly, the improved resolution of population structure obtained with whole mitogenome analysis compared to single mitochondrial gene approaches suggests that female reproductive philopatry may have been overlooked in previous studies of some elasmobranch species.
Keywords Population genetics
Elasmobranch
Philopatry
Dispersal
Control region
D-loop
DOI http://dx.doi.org/10.3354/meps11354   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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