Claremore Daily Progress

Community News Network

April 8, 2013

Crabs supersized by carbon pollution

(Continued)

WASHINGTON —

It was like watching lions tear apart lambs. The crabs scurried from their side of the tanks, banged on the shells of the traumatized oysters, pried them open with a claw in a way similar to what humans do with a knife at restaurants and gobbled them down.

For crab lovers, bigger doesn't necessarily mean better. Carbon-absorbing crabs put all their energy into upgrading shells, not flesh — like a mansion without much furniture. So diners might be disappointed years from now when they crack open huge crabs and find little meat.

The research showing the effects of carbon on marine organisms was published in the journal Geology in 2009. The study, led by Ries and co-authored with Anne Cohen and Daniel McCorkle, and found that crabs, lobsters and shrimp grew bigger more rapidly as carbon pollution increased. Chesapeake blue crabs grew nearly four times faster in high-carbon tanks than in low-carbon tanks.

But under the same conditions, oysters, scallops and other organisms struggle to grow, making them more vulnerable to carnivores. Oysters in high-carbon tanks grew at only one-quarter the speed they did in low-carbon conditions, according to the study.

"It's taking them longer to go from oyster spat to oyster adult," said Luke Dodd, a doctoral candidate at UNC who put the crabs in a tank with oysters. "When you're a baby, there's tons of predators that want to eat you up."

But when they put mud crabs and oysters together in the tanks polluted with carbon, Dodd, Michael Piehler of UNC and Jonathan Grabowski of Northeastern University observed something they didn't expect, a response that gave oysters a prayer.

Under conditions with lower levels of carbon, two mud crabs polished off 20 oysters in six hours. But in the aquariums with higher levels of carbon, the mud crabs seemed confused.

Text Only
Community News Network
  • Arizona's prolonged lethal injection is fourth in U.S. this year

    Arizona's execution of double-murderer Joseph Wood marked the fourth time this year that a state failed to dispatch a convict efficiently, according to the Constitution Project, a bipartisan legal group.3

    July 24, 2014

  • 072214 Diamond Llama 1.jpg Llama on the loose corralled in Missouri town

    A llama on the lam cruised Main Street Tuesday before it mistook a resident’s fenced backyard for a place to grab a meal and freshen up.

    July 22, 2014 2 Photos

  • NWS-HB0713-HowardMartin-004.jpg Airman laid to rest back home in Indiana six decades after death

    The mystery of what happened to a military transport plane that disappeared in the fall of 1952 into an Alaskan glacier was solved two years ago when a helicopter crew spotted the wreckage. But it took another two years to retrieve the remains of Airman Howard Miller and 16 other servicemen passengers. Saturday, Miller was laid to rest in his hometown of Elwood, Ind., with full military honors. Hundreds turned out for the funeral and burial services.

    July 13, 2014 2 Photos

  • New York to offer free lunch to all middle-school students

    New York's $75 billion spending plan for the fiscal year that began last week includes the first step toward offering free lunch for all 1.1 million students, expanding a program now reserved only for the city's poorest children.

    July 9, 2014

  • Screen Shot 2014-07-09 at 11.24.10 AM.png VIDEO: Pilot buys pizzas for storm-delayed travelers

    A Frontier Airlines pilot went above and beyond the call of duty when a recent flight from Washington, D.C. to Denver was diverted to Cheyenne, Wyoming due to bad weather.

    July 9, 2014 1 Photo

  • Why North Korean cheerleaders may soon descend on the South

    When you think of North Korea, "cheerleaders" may not be the first thing that springs to mind. The Hermit Kingdom is perhaps better known for less savory things like gulag-like labor camps and leadership purges.

    July 8, 2014

  • Screen Shot 2014-07-08 at 11.46.13 AM.png VIDEO: Foiled beach gear theft goes viral

    Video capturing a bizarre confrontation with two women allegedly attempting to steal beach gear on a Florida beach has gone viral.

    July 8, 2014 1 Photo

  • Screen Shot 2014-07-08 at 10.40.20 AM.png VIDEO: Sleeping fan suing Yankees, ESPN for $10M

    A fan caught on camera sleeping during a recent game at Yankee Stadium has filed suit against the Yankees and ESPN, claiming he suffered emotional distress when two announcers mocked him on the air.

    July 8, 2014 1 Photo

  • VIDEO: A boom in firework sales

    This year could be quite the boom for fireworks sales across the U.S. According to the American Pyrotechnics Association, or the APA, sales are already off to a good start.

    July 4, 2014

  • Happy birthday, America. Now legalize fireworks.

    Through the smoke of Roman candles and bottle rockets, the absurdity of Americans' obsession with do-it-yourself explosives is nonetheless clear: One day each year, we gather with neighbors, friends and loved ones to blow stuff up in our backyards. Go, U.S.A.!

    July 4, 2014