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Marine Biology

, Volume 158, Issue 7, pp 1497–1509 | Cite as

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

  • Jennifer R. Ovenden
  • Jess A. T. Morgan
  • Raewyn Street
  • Andrew Tobin
  • Colin Simpfendorfer
  • William Macbeth
  • David Welch
Original Paper

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.

Keywords

Microsatellite Locus Null Allele Genetic Homogeneity Shark Species Scalloped Hammerhead 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We are indebted to the many fishers and scientists who collected tissue samples for this project, including those associated with the Marine and Tropical Science Research Facility project 4.8.4 (GBRWHA Inshore fisheries), James Cook University and the fisheries observer programmes in Queensland and New South Wales. The Australian Fisheries Research and Development Corporation supported this study (project 2007/035).

Supplementary material

227_2011_1666_MOESM1_ESM.doc (756 kb)
Supplementary material 1 (DOC 756 kb)

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Copyright information

© Her Majesty the Queen in Rights of Australia as represented by the Government of Queensland 2011

Authors and Affiliations

  • Jennifer R. Ovenden
    • 1
  • Jess A. T. Morgan
    • 1
    • 2
  • Raewyn Street
    • 1
  • Andrew Tobin
    • 3
  • Colin Simpfendorfer
    • 3
  • William Macbeth
    • 4
  • David Welch
    • 3
  1. 1.Molecular Fisheries LaboratoryDepartment of Employment, Economic Development and Innovation, Queensland GovernmentSt. LuciaAustralia
  2. 2.Queensland Alliance for Agriculture and Food Innovation, and Animal Research InstituteThe University of QueenslandMoorookaAustralia
  3. 3.Fishing and Fisheries Research CentreJames Cook UniversityTownsvilleAustralia
  4. 4.Cronulla Fisheries CentreDepartment of Industry and Investment, New South Wales GovernmentCronullaAustralia

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