Tuesday, May 22, 2018
News Roundup

Amid pings, a pregnant pause

Her name is Katharine and she's 14 feet long and weighs more than a ton. She's been causing a bit of stir on Florida's east coast with a sighting off Key Largo on May 19 after she swam past Fort Lauderdale and Miami.

Now she appears to be heading through the Straits of Florida and into the Gulf of Mexico, possibly toward Tampa Bay. She could even hook up with Betsy, another behemoth who's hanging out off the coast of Sarasota right now.

Don't freak out, but these are two great white sharks. And researchers think they could hold the key to protecting the world's oceans.

They were tagged within a week of each other off the coast of Cape Cod in August by researchers from OCEARCH. The organization's mission is to use technology to solve the puzzle of multi-year migrations to great white shark nurseries so that scientists can protect them, said founding chairman and expedition leader Chris Fischer. Mote Marine Laboratory's Center for Shark Research in Sarasota is one of the organization's partners.

Partnering with world-class fishermen and researchers, they devised a way to catch the huge sharks, test them, tag them and release them without injury, he said. Now their movements are tracked on OCEARCH.org, which updates every 30 minutes.

You can see where Katharine or Betsy — or any one of the other sharks that are being tracked — are located at any given time.

Katharine is an especially good research subject because she comes up often to break the surface with her dorsal fin and pings, sending a signal to a satellite to track her location. So far she has traveled almost 4,000 miles from the breeding grounds of Cape Cod. If she returns there in the fall, she's likely not pregnant, because female sharks only return every other year if they are pregnant.

But if she doesn't, it would signal that she's probably pregnant and could lead scientists to the nurseries.

They also are tracking Lydia and Mary Lee, who are pregnant, and hope to get an answer to where the Atlantic nursery might be in July. Fischer said scientists believe it would be one of two great white nurseries in the earth's oceans.

Other than the intrinsically cool aspect of knowing where great whites are heading from day to day, why is this research so important?

Great whites are "the lions of the ocean," said Fischer, who founded the research institute in 2007 after he decided to end a successful fishing show and get into research because of his love of the oceans. "They keep the balance in the oceans. Without them, there would be no fish."

So far, OCEARCH has gone on 19 expeditions and tagged 150 sharks, about 50 of which are still pinging. If they do discover the nursery, they plan on tagging the juvenile sharks and following them to learn further how they impact the ocean.

Fischer believes the public nature of being able to track the sharks through social media, smartphone apps and a website will get people interested in saving the ocean. For example, Katharine the Shark has nearly 7,500 followers on Twitter.

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