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Narragansett Bay temperature extremes signal trouble below

February 6, 2016 — Aboard the Cap’n Bert — A harbor seal pokes its mottled head out of the water, soulful eyes visible above a bristly mustache, before diving back down to snatch fish from the net being winched aboard the trawler.

“Gettin’ a free meal,” Captain Tom Puckett remarks with a shake of his head.

As the otter trawl net is hoisted up on the A-frame across the boat’s stern, it’s clear that it’s nowhere close to full. But it doesn’t matter. The Cap’n Bert is not a commercial fishing trawler. It’s a research vessel owned and operated by the University of Rhode Island’s Graduate School of Oceanography.

The 53-foot stern trawler is out on Narragansett Bay on this winter day carrying out its weekly ritual of testing the water temperature and other indicators and taking samples of marine life.

Doctoral student Joe Langan pulls open the net, spilling fish and shellfish unceremoniously onto the deck. He sorts the catch, just as he has done every week since September and as others have done before him, stretching back more than five decades as part of one of the oldest continuous marine research projects in the world.

From the wet and writhing pile, he picks out sea robin and skate, silver hake and red hake, rock crabs, spider crabs and lobsters — all species that are normally found in the Bay this time of year.

But when Langan gets to the bottom, he carefully picks up a flat, light-brown fish and pauses to study it.

“A Gulf Stream flounder,” he finally says. “Which should not be here.”

The little flounder is a warm-water species that shows up in May but would usually be gone by the time the temperature drops in December.

It is of course only one fish, but its presence here in the waters off Whale Rock on this January morning is yet another sign that Narragansett Bay is changing.

“And we’re seeing it happen,” Langan says.

Read the full story at Providence Journal

Study: Narragansett Bay temps reached record highs, lows last year

January 15, 2016 — SOUTH KINGSTOWN – An oceanographer at the University of Rhode Island’s Graduate School of Oceanography said temperatures in Narragansett Bay hit record highs and lows in 2015.

Jeremy Collie said the temperatures represent the “most extreme” fluctuations observed since the school started surveying the waters 56 years ago.

“What really stands out with our findings is that we had extreme cold and extreme heat in the water temperature in 2015,” Collie said in a statement. “So even though the world is warming because of climate change, we’re still going to have these extremes.”

The findings came from GSO’s Narragansett Bay Fish Trawl, which is done to sample fish every week in the bay and track seasonal or annual changes of marine life. Water temperature also is recorded weekly at the same site off Wickford Village in North Kingstown. Collie has managed the trawl since 1998.

Read the full story at Providence Business News

 

How Probiotics Can Save the East Coast Shellfish Industry

January 12, 2016 — Bob Rheault was having an open house at his young shellfish hatchery, so he arrived early in the morning with bottles of wine and plates of cheese. That’s when he noticed he had a problem.

“There was an odd substance floating on the surface of the tanks,” Rheault says. He looked through a microscope, “and there were no bodies to be seen … just empty shells with bacteria climbing all over them.”

In oyster and clam hatcheries, a bacterial infection can cause the population to drop from 10 million to 1,000 larvae overnight. That’s what happened to Rheault, who had no larvae to show his open house guests. Antibiotics aren’t approved for use in U.S. shellfish hatcheries (though they are worldwide)—and, by the time an infection sets in, all the larvae are dead anyway—so the only thing for a hatchery owner to do when confronted with an infection is dump everything out, clean the tanks, and start over.

Or that used to be the only approach. Now, researchers at two labs seem to have found a solution.

The problem of bacterial infections in hatcheries has been worsening over the past decade as the waters of the Northeast warm. Rheault, who is now the president of the East Coast Shellfish Growers Association, says that thanks to climate change, bacterial infections now kill off 10 to 20 percent of the Northeast’s shellfish larvae each year. And because the bacteria, Vibrio, gets into the tanks via seawater, it affects not only shellfish but also lobsters, by turning their shells black and making them impossible to sell. (Some lobstermen eat the animals themselves or send them to be cooked and processed, since the meat is still good.)

Researchers have now found a tool to fight the Vibrio bacteria: probiotics. Teams at both NOAA’s Milford Laboratory in Connecticut and the University of Rhode Island (URI) have harvested beneficial bacteria from healthy adult oysters that can help oyster larvae fight off bacterial infections. And the URI researchers are exploring the possibility that a similar concoction could help treat lobster shell disease as well.

Read the full story at Civil Eats

 

URI researchers to study climate change effect on fisheries

December 19, 2015 — PROVIDENCE, R.I. (AP) — Researchers at the University of Rhode Island have been awarded a federal grant to study the effects of climate change on Atlantic fisheries.

The state’s congressional delegation says the National Oceanic and Atmospheric Administration is giving the researchers $227,850.

Jeremy Collie, at the URI Graduate School of Oceanography, is leading the team. Scientists are participating from NOAA’s Northeast Fisheries Science Center, Narragansett Laboratory, located on URI’s Bay Campus.

Read the full story from the Associated Press at ABC6 News

 

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