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 Sharks
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Sharks: Among the World's Most Threatened Vertebrates

Diving with lemon sharks off Jupiter, FL.

A quarter of the world’s sharks and rays are threatened with extinction according to The IUCN Red List of Threatened Species.

According to the findings, sharks, rays and chimaeras are at a substantially higher risk than most other groups of animals and have the lowest percentage of species considered safe – with only 23% categorized as Least Concern.

“Our analysis shows that sharks and their relatives are facing an alarmingly elevated risk of extinction,” says Dr Nick Dulvy, IUCN SSG Co-Chair and Canada Research Chair at Simon Fraser University in British Columbia. “In greatest peril are the largest species of rays and sharks, especially those living in shallow water that is accessible to fisheries.”

Overfishing is the main threat to the species, according to the paper. Reported catches of sharks, rays and chimaeras peaked in 2003 and have been dominated by rays for the last 40 years. Actual catches are likely to be grossly under-reported.

Shark Diving petting Tiger & Lemon sharks

“Sharks, rays and chimaeras tend to grow slowly and produce few young, which leaves them particularly vulnerable to overfishing,” says Sonja Fordham, IUCN SSG Deputy Chair and president of the Washington, DC-based Shark Advocates International, a project of The Ocean Foundation. “Significant policy strides have been made over the last two decades but effective conservation requires a dramatic acceleration in pace as well as an expansion of scope to include all shapes and sizes of these exceptional species. Our analysis clearly demonstrates that the need for such action is urgent.”

Sharks, rays and chimaeras are known as ‘cartilaginous fish’ due to the fact that their skeletons are made of cartilage rather than bone. They are one of the world’s oldest and most ecologically-diverse groups of animals.

The study is the result of a collaboration of 302 experts from 64 countries.

For more information or interviews please contact:
Ewa Magiera, IUCN Media Relations, t +41 22 999 0346 m +41 79 856 76 26, e ewa.magiera@iucn.org  
Lynne Labanne, IUCN Species Programme Communications Officer, IUCN, t +41 22 999 0153, m +41 79 527 7221, e lynne.labanne@iucn.org


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