1. Ecology
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Extinction Risk: Counting the cost of overfishing on sharks and rays

  1. Darcy Bradley  Is a corresponding author
  2. Steven D Gaines  Is a corresponding author
  1. Bren School of Environmental Science and Management, University of California, Santa Barbara, United States
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Cite this article as: eLife 2014;3:e02199 doi: 10.7554/eLife.02199
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Sharks and rays are more under threat than insects, mammals and amphibians.

According to the Red List of Threatened Species maintained by the International Union for the Conservation of Nature (IUCN), 1148 species of insects (24.9% of the total), 1467 species of mammals (26.6%) and 2339 species of amphibians (36.5%) are ‘Threatened or Near Threatened’. Dulvy et al. estimate that for sharks and rays this figure is 562 species (53.9% of the total). The IUCN definition of Threatened includes species that are Critically Endangered, Endangered or Vulnerable.

Illustrations: Dru Drury, USDA APHIS, and Nobu Tamura. Photograph: Chris Huh.

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