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Negligible evidence for regional genetic population structure for two shark species Rhizoprionodon acutus (Rüppell, 1837) and Sphyrna lewini (Griffith & Smith, 1834) with contrasting biology

Ovenden, J.R. and Morgan, J. and Street, R. and Tobin, A. and Simpfendorfer, C.A. and Mcbeth, W. and Welch, D.J. (2011) Negligible evidence for regional genetic population structure for two shark species Rhizoprionodon acutus (Rüppell, 1837) and Sphyrna lewini (Griffith & Smith, 1834) with contrasting biology. Marine Biology, 158 (7). pp. 1497-1509.

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Article Link(s): http://dx.doi.org/10.1007/s00227-011-1666-y

Dataset URL: http://era.deedi.qld.gov.au/1865/
Publisher URL: http://www.springer.com

Abstract

Biodiversity of sharks in the tropical Indo-Pacific is high, but species-specific information to assist sustainable resource exploitation is scarce. The null hypothesis of population genetic homogeneity was tested for scalloped hammerhead shark (Sphyrna lewini, n = 237) and the milk shark (Rhizoprionodon acutus, n = 207) from northern and eastern Australia, using nuclear (S. lewini, eight microsatellite loci; R. acutus, six loci) and mitochondrial gene markers (873 base pairs of NADH dehydrogenase subunit 4). We were unable to reject genetic homogeneity for S. lewini, which was as expected based on previous studies of this species. Less expected were similar results for R. acutus, which is more benthic and less vagile than S. lewini. These features are probably driving the genetic break found between Australian and central Indonesian R. acutus (F-statistics; mtDNA, 0.751–0.903, respectively; microsatellite loci, 0.038–0.047 respectively). Our results support the spatially homogeneous monitoring and management plan for shark species in Queensland, Australia.

Item Type:Article
Funders:Australian Fisheries Research & Development Corporation
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), QAFFI, Agri-Science
Projects:Stock structure of exploited shark species in north eastern Australia, project 2007/035
Business groups:Agri-Science
Additional Information:(c) Her Majesty the Queen in Rights of Australia as represented by the Government of Queensland.
Keywords:Shark; Australia; biodivesity; genetic.
Subjects:Aquaculture and Fisheries
Aquaculture and Fisheries > Fisheries > Fishery for individual species
Science > Biology > Genetics
Deposited On:14 Jul 2011 06:09
Last Modified:15 Nov 2011 03:43

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