September 18, 2012
Researchers tag great white sharks off Cape Cod
The Associated Press
Massachusetts shark expert Greg Skomal pulls the cap off a blood sample taken from an Atlantic great white shark before performing blood gas analysis moments after the nearly 15-foot, 2,292-pound shark was released from the research vessel Ocearch off the coast of Chatham, Mass. The Ocearch team baits the fish and leads them onto a lift, tagging and taking blood, tissue and semen samples up close from the world's most feared predator. The real-time satellite tag tracks the shark each time its dorsal fin breaks the surface, plotting its location on a map.
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CHATHAM, Mass. -- The scientists and fishermen on board the Ocearch, a repurposed crabbing vessel, received word that their scouting boat had hooked a great white shark, sparking a flurry of activity.

They were about to get up close and personal with the animal, more than 2,000 pounds and nearly 15 feet long.

"I'm nervous," said state shark expert Greg Skomal, who has tagged great whites, but never like this, never this close.

The Ocearch crew tags great white sharks in an unorthodox way. Unlike Skomal's team, which has tagged a dozen great whites off the Massachusetts coast with harpoons, Chris Fischer's Ocearch crew baits the fish and leads them onto a large platform that lifts them out of the water for tagging and collecting blood, tissue and semen samples.

Ocearch, a nonprofit research organization named for a combination of "ocean" and "research," is crewed mainly by sport fishermen. It is funded by sponsors and donors, and a South Africa expedition was the subject of History channel's "Shark Wranglers."

Now, Ocearch has come to Cape Cod for a few weeks, minus the reality show and plus local scientists, to help shed light on the sharks' migration patterns, protect breeding and birthing sites, improve public safety and raise awareness about the threatened species that is a rising presence in the area.

"We have massive knowledge gaps about how to protect their future," said Fischer, Ocearch's expedition leader.

Ocearch's real-time satellite tags last five years. Each time sharks' dorsal fins breaks the surface, the tags ping a satellite and mark an online map, accessible to researchers and the public.

The work is dangerous for both man and fish. One shark died on the lift in South Africa. The crew tries to return sharks to the water within 15 minutes.

"I used to be nervous of what they'd do to me," co-captain Jody Whitworth said. "Now I worry that we'll hurt them."

The Cape Cod expedition faces another challenge: finding the fish.

While great white sightings have risen near Cape Cod, they are much more common off South Africa or Australia.

Skomal estimates 30 great whites roam the Cape Cod coast on any given day. The Ocearch crew hopes to tag five.

Protecting these sharks is key, researchers say.

"These predators keep the next lower level in check," said Bob Hueter, of Mote Marine Laboratory, one of the research organizations working with the Cape Cod expedition. "It's a system of checks and balances."

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Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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