March 15, 2010

In the waters off Maine, visitors too large to ignore

— Traffic on the Maine Turnpike may be down this summer, but that other north-south freeway -- the watery one just off the coast -- is getting plenty of use by some unlikely visitors.

click image to enlarge

Credit: Nuno Fragoso, UNH Large Pelagics Research Center, July 2008: University of New Hampshire Ph.D. student Kara Dodge with a satellite-tagged leatherback turtle just prior to its release in Vineyard Sound.

Boaters and fishermen, in fact, are being warned to steer clear.

Leatherback turtles, one of the largest reptiles on Earth, have been showing up in uncommonly large numbers all along the New England coast this summer, including in the brisk coastal waters off Maine.

So far, seven of the huge turtles have been seen along the Maine coast. Three of them, including one near Ogunquit Beach last month, were dead. The other four were tangled in fishing gear but released.

And there are almost certainly more out there or on their way. September is the time when turtle sightings -- if there are any -- typically get reported in Maine.

A record number of sightings of both live and dead leatherback turtles off New England -- nearly 100 since June -- prompted a federal warning to boaters to keep eyes open for them. Many of the dead turtles have shown up with propeller wounds.

Leatherbacks are more mobile and can tolerate cooler water than other turtles, migrating from the Caribbean to as far north as Canada each summer. Most sightings in this part of the world are around Cape Cod. The turtles are more rare, but not unheard of, in Maine waters.

Last year also was a relatively big one, with seven turtles reported along the Maine coast. Before that, it was typically one or two a summer, at most.

It's not clear how much of the increase here is due to more reporting. But there is clearly something attracting them this summer.

Named for their rubbery shell, adult leatherbacks can grow to 8 feet and 2,000 pounds. A more typical visitor here is about 1,000 pounds and 6 feet long.

What makes their size even more remarkable is that their favorite food is jellyfish, which are as filling as, well, sugar-free Jell-O. You have to eat a lot of jellyfish to weigh 1,000 pounds.

Which seems to explain why they're here.

''We've just had a huge number of jellyfish in coastal waters,'' said Kara Dodge, a researcher at the University of New Hampshire who has tagged leatherbacks to study their migration.

And why are the jellyfish here? ''We just don't really know,'' she said.

Leatherbacks are protected as an endangered species. In some parts of the world, the turtles and their eggs are taken for food.

In this part of the world, they can get struck by boats, entangled in fishing gear or choked by plastic bags mistaken for jellyfish.

Although all those things are considered threats to the population, Atlantic leatherbacks have been doing much better than those in the Pacific.

For now, the federal government is simply urging caution along the new England coast. Sightings, especially of entangled turtles, should be reported by calling 1-888-SEA-TURT.

And keep your eyes open. You'll know them when you see them.

Staff Writer John Richardson can be contacted at 791-6324 or at:

jrichardson@pressherald,com

Read John's blog at:

www.pressherald.com

Were you interviewed for this story? If so, please fill out our accuracy form

Send question/comment to the editors




Further Discussion

Here at PressHerald.com we value our readers and are committed to growing our community by encouraging you to add to the discussion. To ensure conscientious dialogue we have implemented a strict no-bullying policy. To participate, you must follow our Terms of Use.

Questions about the article? Add them below and we’ll try to answer them or do a follow-up post as soon as we can. Technical problems? Email them to us with an exact description of the problem. Make sure to include:
  • Type of computer or mobile device your are using
  • Exact operating system and browser you are viewing the site on (TIP: You can easily determine your operating system here.)