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New DNA Study Reveals Fins of Endangered Shark in U.S. Soups

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Scalloped hammerhead among those identified in samples collected in 14 cities

Americans who eat shark fin soup—an Asian delicacy costing up to $100 per bowl in the United States—might be unknowingly consuming an endangered species. According to an unprecedented scientific analysis by Stony Brook University, the Field Museum in Chicago and with support from the Pew Environment Group, the shark fin soup served in 14 U.S. cities contains at-risk species, including scalloped hammerhead, which is listed by the International Union for Conservation of Nature (IUCN) as Endangered globally.

“The DNA testing again confirms that a wide variety of sharks are being killed for the fin trade, including seriously threatened species,” said Dr. Demian Chapman, who co-led the DNA testing at the Institute for Ocean Conservation Science at Stony Brook University in New York. “U.S. consumers of shark fin soup cannot be certain of what’s in their soup. They could be eating a species that is in serious trouble.”                                                                           

Click the image to download graphic

  shrk-shark-soup-chart-450-lw  

In addition to the scalloped hammerhead, the team found that the 32 samples identified as sharks included smooth hammerheads, school sharks, and spiny dogfish, which are all listed as Vulnerable to extinction; and other Near Threatened species such as bull and copper sharks.

“This is further proof that shark fin soup here in the United States—not just in Asia—is contributing to the global decline of sharks,” said Liz Karan, manager of global shark conservation at the Pew Environment Group. “Sharks must be protected from overfishing and any international trade in these vulnerable and endangered species must be tightly regulated.”

Dr. Chapman’s research combines DNA-analysis with ecological data to better understand the population biology, evolution, and ecology of large marine vertebrates, particularly sharks and their relatives. He worked with the Pritzker Laboratory at the Field Museum in Chicago to modify existing DNA-barcoding techniques to identify shark DNA fragments that had deteriorated in the fin treatment and cooking process. This study represents the first time that shark fin soup has been tested in a large, nationwide manner.

Samples were collected in Albuquerque; Atlanta; Boston; Chicago; Denver; Fort Lauderdale, Fla.; Houston; Las Vegas; Los Angeles; New York; Orlando; San Francisco; Seattle, and Washington, D.C.

Shark attack survivors who have become global advocates for conservation of their attackers helped collect some of the samples for the study. The survivors, as well as the soup study, will be featured during Discovery’s show “Shark Fight” at 9 p.m. EDT Wednesday, Aug. 15.

For interviews with global shark experts, scientists, and the shark attack survivors, please contact Rachel Brittin, 202-540-6312 (office), or 202-286-4149 (cell).

Editor's Notes:


The Pew Environment Group is the conservation arm of The Pew Charitable Trusts, a nongovernmental organization that works globally to establish pragmatic, science-based policies that protect our oceans, preserve our wild lands, and promote clean energy. For more information, visit www.PewEnvironment.org

The Institute for Ocean Conservation Science at Stony Brook University is dedicated to advancing ocean conservation through science. The Institute transforms real-world policy while pursuing serious science, both of which are essential for ocean health. For more information, go to:
http://www.oceanconservationscience.org/

The Field Museum's Pritzker Laboratory is an inter-departmental multi-user core facility dedicated to the genetic analysis and preservation of the world's biodiversity. For more information, visit
http://fieldmuseum.org/explore/department/pritzkerlab 

 

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  • Chinese Business Executives Lead the Way on Shark Conservation

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    • Apr 22, 2014

    Four of China’s most successful business executives have been recognized as “Global Shark Guardians” for their work securing a ban on shark fin soup at Chinese state banquets. On April 17, The Pew Charitable Trusts, The Nature Conservancy, and WildAid honored Guo Guangchang, Wan Jie, Ding Liguo, and Zhang “Jim” Xingsheng at the annual meeting of the China-U.S. Business Leaders Roundtable in New York.

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