Stalking Sharks

Researchers monitor the movement of the Pacific’s largest predators and share the information with the world in real time.

Written byJef Akst
| 3 min read

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Meet L-Town, a male great white shark that was recently detected off the coast of San Francisco. At 4 meters long (13 feet) long and 800 kilograms (1,765 pounds), L-Town is actually one of the smaller members of Shark Net, a new iPhone/iPad app that allows users to follow the Pacific’s greatest predators as they travel the oceans traversing a network of acoustic receivers.

“I realized we have one of the wildest places on Earth here in our own backyard,” says Stanford University marine sciences professor Barbara Block. “We have all these predators, but nobody can see them.”

“I think it’s a great initiative,” says behavioral ecologist David Jacoby, who is just finishing up his PhD at The Marine Biological Association of the United Kingdom. “All good conservation practice should involve and stimulate the public interest, and this definitely does that.”

The project builds on the success of the Tagging ...

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  • Jef (an unusual nickname for Jennifer) got her master’s degree from Indiana University in April 2009 studying the mating behavior of seahorses. After four years of diving off the Gulf Coast of Tampa and performing behavioral experiments at the Tennessee Aquarium in Chattanooga, she left research to pursue a career in science writing. As The Scientist's managing editor, Jef edited features and oversaw the production of the TS Digest and quarterly print magazine. In 2022, her feature on uterus transplantation earned first place in the trade category of the Awards for Excellence in Health Care Journalism. She is a member of the National Association of Science Writers.

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