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Latest Portunoidea Stories

Marsh Crabs Show Ecological Benefits Of Invasive Species
2013-04-04 10:17:30

Alan McStravick for redOrbit.com - Your Universe Online The marsh systems around Cape Cod have been eroding at a rapid rate in the past few decades. As redOrbit reported in January, researchers from Brown University were able to find a cause and effect relationship between human interaction with the ecosystem and the rapid increase in the native purple crab population. As their research detailed, human manipulation of the region via recreational overfishing and the creation of drainage...

Invading Sea Crab Reaches The Ebro Delta
2012-05-25 09:32:06

Originally endemic to the Atlantic Coast of North America, over the past 30 years Dyspanopeus sayi has been involuntarily introduced in the UK, France, the Netherlands, the Black Sea and the Adriatic Sea. A study shows that in recent years the sea crab has established itself along the Western Mediterranean Coast. A team of Spanish and German researchers have recorded the first American Dyspanopeus sayi sea crab in the bay of Els Alfacs in the Ebro Delta (Spain). Both sexes were captured...

2011-09-27 09:37:17

Researchers have found that a species invasion that starts at the upstream edge of its range may have a major advantage over downstream competitors, at least in environments with a strong prevailing direction of water or wind currents. Scientists from the University of Georgia, University of New Hampshire, Smithsonian Environmental Research Center and University of Vermont studied populations of European green crab, Carcinus maenas. The species was introduced to the East Coast of North...

Crabs Put The Pinch On Marshlands
2011-09-26 10:58:40

   Hungry purple marsh crabs threaten Cape Cod salt marshes [ Watch the Video ] If you take a quick glance at the marsh next to Saquatucket Harbor in Harwich Port, Mass., you will notice right away that some of the grass is missing. The cordgrass there, and all around Cape Cod, has been slowly disappearing for decades. "The cordgrass that's being destroyed here is the foundation species that builds salt marshes," explains marine ecologist Mark Bertness of Brown...

2011-01-25 11:50:59

Genome-based technique helps identify a virus lethal to blue crab A research effort designed to prevent the introduction of viruses to blue crabs in a research hatchery could end up helping Chesapeake Bay watermen improve their bottom line by reducing the number of soft shell crabs perishing before reaching the market. The findings, published in the journal Diseases of Aquatic Organisms, shows that the transmission of a crab-specific virus in diseased and dying crabs likely occurs after the...

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2010-08-30 20:03:21

Decline may affect at-risk shorebirdsA distinct decline in horseshoe crab numbers has occurred that parallels climate change associated with the end of the last Ice Age, according to a study that used genomics to assess historical trends in population sizes.  The new research also indicates that horseshoe crabs numbers may continue to decline in the future because of predicted climate change, said Tim King, a scientist with the U.S. Geological Survey and a lead author on the new study...

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2010-05-17 10:50:00

In 1988, a mysterious invader washed upon the New Jersey shore. The Asian shore crab likely arrived in ballast from commercial ships, and it found its new home to be quite agreeable. More than two decades later, the crab, Hemigrapsus sanguineus, has expanded its range along the Atlantic coast northward to Maine and southward to North Carolina. Its numbers continue to expand, and wildlife biologists have found them in greater densities along New England's cobbled shores. Another tale of an...

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2010-01-27 08:13:44

The Atlantic blue crab, Callinectes sapidus, long prized as a savory meal at a summer party or seafood restaurant, is a multi-million dollar source of income for those who harvest, process and market the crustacean along the U.S. Atlantic and Gulf coasts. Unfortunately, the blue crab population has been declining in recent years under the assault of viruses, bacteria and man-made contaminants. The signs of the attack often are subtle, so researchers from the National Institute of Standards...

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2009-10-28 08:03:07

University of Alabama at Birmingham (UAB) researchers are close to unraveling intricate cellular pathways that control molting in blue crabs. The discoveries could revolutionize the soft-shell crab industry, generating new jobs and additional profits for the U.S. fishing industry along the coastal Southeast. Soft-shelled blue crabs are a delicacy enjoyed by food lovers each spring and early summer when the crustaceans naturally molt their hard outer shell in the wild. Molting is the process...

2009-09-13 14:16:29

A woman in Virginia says the blue crab she caught during a recent crabbing run on the James River was very rare as its blue coloring coated its entire body. The Newport News (Va.) Daily Press said Sunday that Sally Epps found the all-blue crab during a recent crabbing run near Virginia's Craney Island and was immediately struck by the animal's rare coloring. I just said, 'You know, this looks real strange, Epps said. Epps, whose age was not reported but who has 11 years of crabbing...


Latest Portunoidea Reference Libraries

0_7e27299519b98ce0a6093f607b9a671a
2008-05-04 22:56:03

The Vernal Crab (Liocarcinus vernalis), is a small shallow-water crab found in the northeast Atlantic. It is commonly used as bait for Black Fish. Photo Copyright and Credit

47_79ace77ffd4e719ab85b1c36695fa214
2008-05-01 00:27:07

The Flower Crab (Portunus pelagicus), also known as the Blue Crab, Blue Swimmer Crab, Blue Manna Crab or Sand Crab, is a large crab found in the intertidal estuaries of the Indian and Pacific Oceans (Asian coasts) and the Middle-Eastern coast of the Mediterranean Sea. The name "flower crab" is used in east Asian countries while the latter names are used in Australia. The crabs are widely distributed in eastern Africa, Southeast Asia, Japan, Australia and New Zealand. The Flower Crab is not...

0_97e80b0cee1724050e0a582451c5260d
2009-03-27 18:08:12

Callinectes sapidus, or more familiarly known as the Blue Crab, is a crustacean inhabiting the waters of the western Atlantic Ocean and Gulf of Mexico. Maryland advertises the species as its State Crustacean and consequently, it is the subject of an extensive fishery there. The Blue Crab is particularly aggressive and complicated to handle safely. It is hostile and known to react at any movement they determine a threat. The western edge of the Atlantic Ocean from Nova Scotia to...

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