Food Web Woes

If sharks disappeared from the oceans, rays might thrive, but shellfish would probably suffer.

By Emily Sohn, 00:00 AM March 30, 2007

Sharks are scary—no doubt about it. Just ask anyone who's seen Jaws or other films that feature these sharp-toothed creatures.

But there's something that might be just as scary as meeting up with a shark—at least from an environmental perspective. It's the thought of what might happen if sharks disappeared from the oceans. That's because sharks are important players in delicate food webs, suggests a new study out of Canada.

Fishing companies have been killing large sharks for decades. Some...

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