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An initiative of the Center for Biological Diversity

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David Shiffman

is a marine biologist specializing in the ecology and conservation of sharks. He received his Ph.D. in environmental science and policy from the University of Miami. Follow him on Twitter, where he's always happy to answer any questions anyone has about sharks.
http://twitter.com/whysharksmatter
Sandbar shark
Wildlife

How to Save Sharks and Rays From Extinction

New research reveals that one third of sharks and their relatives are at risk. But the scientists say several clear policy choices can help.
December 13, 2021
by
David Shiffman
New research reveals that one third of sharks and their relatives are at risk. But the scientists say several clear policy choices can help.
Galapagos shark
Wildlife

Behind the Science: How Do We Know How Many Shark Species Are at Risk?

A troubling new report finds that one third of sharks and their relatives are threatened with extinction. How did the international research team perform this analysis during the pandemic?
November 29, 2021
by
David Shiffman
A troubling new report finds that one third of sharks and their relatives are threatened with extinction. How did the international research team perform this analysis during the pandemic?
Oceans & Clean Water

How Did the Pandemic Affect Ocean Conservation?

Clickbait stories of happy animals returning to suddenly quiet habitats paint an overly rosy picture of COVID-19’s impact on the marine environment.
April 12, 2021
by
David Shiffman
Clickbait stories of happy animals returning to suddenly quiet habitats paint an overly rosy picture of COVID-19’s impact on the marine environment.
bluefin tuna
Wildlife

‘Essential’ But Unprotected: How the United States Fails Its Most Important Fish Habitats

A new report concludes U.S. waters “have insufficient protections for a healthy future,” and that the problem has gotten worse under the Trump administration.
July 20, 2020
by
David Shiffman
A new report concludes U.S. waters “have insufficient protections for a healthy future,” and that the problem has gotten worse under the Trump administration.
octopus
Oceans & Clean Water

Trump Administration Eliminates Protections for Vast Ocean Monument — Experts React

Here’s why the action is so harmful, how it’s possibly illegal, and why it won’t help struggling fishing communities.
June 11, 2020
by
David Shiffman
Here’s why the action is so harmful, how it’s possibly illegal, and why it won’t help struggling fishing communities.
Fishing
Wildlife

Fishing for Fun? It Has a Bigger Environmental Impact Than We Thought

New research shows that recreational fishing can sometimes be a huge problem — especially for threatened species of marine fish.
March 16, 2020
by
David Shiffman
New research shows that recreational fishing can sometimes be a huge problem — especially for threatened species of marine fish.
skulls
Wildlife

We Need to Talk About Environmental Projects That Fail

Celebrating success is great, but a new study finds patterns we can learn from — including the fact that we ignore failure at our own peril.
November 25, 2019
by
David Shiffman
Celebrating success is great, but a new study finds patterns we can learn from — including the fact that we ignore failure at our own peril.
White tip sharks
Wildlife

Are We Ready for Shark Conservation to Succeed?

Successful conservation means more sharks, which is great for the health of the ocean but could also be problematic in a few important ways. Here’s how experts say we should prepare.
September 25, 2019
by
David Shiffman
Successful conservation means more sharks, which is great for the health of the ocean but could also be problematic in a few important ways. Here’s how experts say we should prepare.
rhino ray
Wildlife

A Chance to Save the ‘Rhinos of the Sea’

Big-nosed giant guitarfishes and wedgefishes are now the most endangered marine fish group. Will the international community step up to protect them from trade and exploitation?
August 15, 2019
by
David Shiffman
Big-nosed giant guitarfishes and wedgefishes are now the most endangered marine fish group. Will the international community step up to protect them from trade and exploitation?
grey reef sharks
Wildlife

How to Protect Sharks From Overfishing

Marine protected areas can benefit sharks and other oceanic species — but only if they’re properly established, according to a new guidebook.
June 6, 2019
by
David Shiffman
Marine protected areas can benefit sharks and other oceanic species — but only if they’re properly established, according to a new guidebook.

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