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Abstract

ABSTRACT: The narrow sawfish Anoxypristis cuspidata belongs to the most endangered family of chondrichthyan fishes, the sawfishes (Pristidae). This species has undergone significant declines in geographic range and abundance due to anthropogenic activities including fishing and habitat destruction. Very little is known of adult movements within its distribution. In order to better manage and protect this endangered species, understanding patterns of habitat use, connectivity and behaviour is important. Using a combination of partial mitochondrial sequences (control region [CR] and NADH dehydrogenase 4 [ND4]) and nuclear markers (microsatellites), this study assessed the genetic population structure of A. cuspidata in Australia and Papua New Guinea. Significant population structuring using mitochondrial DNA was found between the east Australian coast, Gulf of Papua and Gulf of Carpentaria (using concatenated CR and ND4 markers) (analysis of molecular variance [AMOVA], ΦST = 0.082, p = FST = 0.012, p = 1.000). Our results suggest that a combination of historic genetic drift, maternal natal philopatry and possible male-biased dispersal likely drive the genetic patterns observed. Given the endangered status and lack of knowledge for A. cuspidata, this study presents important insights that may be used to inform management efforts.

Item Type:	Article
Authors/Creators:	Green, ME and D'Anastasi, BR and Hobbs, JPA and Feldheim, K and McAuley, R and Peverell, S and Stapley, J and Johnson, G and Appleyard, SA and White, WT and Simpfendorfer, CA and van Herwerden, L
Keywords:	Pristidae, genetics, Indo-Pacific, mitochondrial DNA, microsatellites
Journal or Publication Title:	Endangered Species Research
Publisher:	Inter-Research
ISSN:	1613-4796
DOI / ID Number:	https://doi.org/10.3354/esr00912
Copyright Information:	© The authors 2018. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/
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