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Low Worldwide Genetic Diversity in the Basking Shark (Cetorhinus maximus)
Biology Letters
  • A. Rus Hoelzel, University of Durham - United Kingdom
  • Mahmood S. Shivji, Nova Southeastern University
  • Jennifer E. Magnussen, Nova Southeastern University
  • Malcom Francis, National Institute of Water and Atmospheric Research - New Zealand
Document Type
Publication Date
  • Biodiversity,
  • Marine fish,
  • Sharks,
  • Mitochondrial DNA
The basking shark (Cetorhinus maximus) is found in temperate waters throughout the world's oceans, and has been subjected to extensive exploitation in some regions. However, little is known about its current abundance and genetic status. Here, we investigate the diversity of the mitochondrial DNA control region among samples from the western North Atlantic, eastern North Atlantic, Mediterranean Sea, Indian Ocean and western Pacific. We find just six haplotypes defined by five variable sites, a comparatively low genetic diversity of π=0.0013 and no significant differentiation between ocean basins. We provide evidence for a bottleneck event within the Holocene, estimate an effective population size (Ne) that is low for a globally distributed species, and discuss the implications.

©2006 The Royal Society

Citation Information
A. Rus Hoelzel, Mahmood S. Shivji, Jennifer E. Magnussen and Malcom Francis. "Low Worldwide Genetic Diversity in the Basking Shark (Cetorhinus maximus)" Biology Letters Vol. 2 Iss. 4 (2006) p. 639 - 642 ISSN: 1744-9561
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