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Latest Bivalves Stories

2006-01-24 20:59:41

By Lucas van Grinsven AMSTERDAM (Reuters) - Blue-collar workers in Europe and the United States who feel threatened by Asian rivals should spare a thought for local birds, crabs and oysters, also facing competition from more efficient eastern species. Dull-colored pigeons, starlings and crows used to dominate the skies above Amsterdam, but these days citizens might spot the brilliant green plumage of a long-tailed tropical parakeet. Originally from Asia, 1,200 collar parakeets now...

2006-01-25 00:55:00

By Lucas van Grinsven AMSTERDAM -- Blue-collar workers in Europe and the United States who feel threatened by Asian rivals should spare a thought for local birds, crabs and oysters, also facing competition from more efficient eastern species. Dull-colored pigeons, starlings and crows used to dominate the skies above Amsterdam, but these days citizens might spot the brilliant green plumage of a long-tailed tropical parakeet. Originally from Asia, 1,200 collar parakeets now live in the Dutch...

2005-10-24 13:17:34

By Kevin Krolicki NEW ORLEANS (Reuters) - Louisiana's oyster processing plants went back to work on Monday for the first time in two months after health officials cleared about half of the state's oyster beds for resumed harvesting. Louisiana's $250-million oyster industry typically accounts for a third of U.S. output, but the twin punches of Hurricane Katrina in late August and then Hurricane Rita a month later shut down production of a specialty prized on local menus. The first...

2005-10-05 17:24:37

By Gene Emery BOSTON (Reuters) - Warming ocean waters may have tainted Alaskan oysters with a bacteria that triggered four outbreaks of illness on a cruise ship among people who ate the shellfish raw, researchers reported on Wednesday. "The rising temperatures of ocean water seem to have contributed to one of the largest known outbreaks of Vibrio parahaemolyticus in the United States," said Joseph McLaughlin of the Alaska Department of Health and Social Services, referring to the...

2005-08-30 14:40:00

A study published in the latest issue of Restoration Ecology finds that in coastal Louisiana, oyster reefs help to deter erosion. Oyster reefs are self-sustaining, and are additionally attractive because they use native materials, have the potential for long-term growth, and contribute to overall ecosystem stability and quality. Oyster larvae move in groups and water-borne chemicals stimulate the oysters' settlement; reefs are therefore able to maintain themselves as new recruits settle and...

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2005-08-23 07:17:56

PORTLAND, Maine -- A survey of Cobscook Bay has uncovered the presence of sea squirts, an invasive species that scientists fear could overwhelm valuable shellfish beds and alter the marine ecosystem, researchers said Monday. The survey this month confirmed an initial sighting of Didemnum, a type of sea squirt that has rapidly colonized on Georges Bank fishing ground. The concern is that sea squirts can quickly overrun the ocean's bottom, covering everything from rocks to scallops and...

2005-07-27 07:35:01

By Pascal Fletcher CUBAGUA, Venezuela (Reuters) - Those who fear the world's economy will crash the day the Earth's oil reserves run dry can cite the "pearl island" of Cubagua as a lesson in how not to exploit a natural resource. This parched, almost uninhabited, scrub-covered islet off Venezuela's eastern coast was once a booming Spanish colonial trade depot that sent shiploads of glittering pearls to Europe to adorn the rings, necklaces and robes of monarchs and popes. Nearly five...

2005-07-20 17:25:00

The numbers of overwintering waterbirds at Lake Constance, a large lake on the borders of Germany, Austria and Switzerland, have increased fourfold since the early 1960s, with a daily average of 162 500 waterbirds from September to April as shown by a study published in the august issue of Freshwater Biology. This massive increase coincides with the major expansion of zebra mussels in the lake, originating in the Caspian-Aral basin, and a major pest in Europe and North America. The main...

2005-07-19 15:45:54

By Andy Sullivan WASHINGTON (Reuters) - The Eastern Oyster may be in trouble in the Chesapeake Bay, but any move to protect it as an endangered species could devastate thriving oyster fisheries from Maine to Louisiana, fishermen told Congress on Tuesday. The National Marine Fisheries Service is expected to decide by January whether the oyster should be listed as threatened or endangered under the Endangered Species Act, a move that could prohibit it from being harvested nationwide. The...

2005-05-30 16:14:37

NEWPORT NEWS, Va. -- A 30-month fact-finding experiment will examine how Asian oysters grow, perform and survive in the Chesapeake Bay. Researchers with the Virginia Institute of Marine Science and the University of Maryland will place thousands of the exotic oyster species in cages in the bay at four sites, two in Maryland and two in Virginia. The scientists want to see how the Asian oysters compete with native oysters, whether they survive diseases that have ravaged the native stocks and...


Latest Bivalves Reference Libraries

Chinese Pond Mussel, Sinanodonta woodiana
2013-10-11 11:20:39

The Chinese Pond Mussel (Sinanodonta woodiana), known also as the Eastern Asiatic Freshwater Clam or the Swan-mussel, is a species of freshwater mussel, an aquatic bivalve mollusk belonging to the family Uniondale, the river mussels. The shell is brown or blackish, occasionally with a greenish hue, the color varying but normally more intensively colored at the periphery. The shape is elliptical to almost spherical, with the lower margin strongly convex. It is native to Eastern Asia but...

Corbicula fluminea
2013-10-11 11:17:31

Corbicula fluminea is a species of freshwater clam, an aquatic bivalve mollusk belonging to the family Corbiculidae. This species is originally from Asian origin, therefore it is often referred to as the Asian Clam or Asiatic Clam. Within the aquarium and koi pond trade it is frequently called the Golden Clam or Golden Freshwater Clam. Within southeast Asia its known as the Prosperity Clam or the Good Luck Clam. It has been introduced into many parts of the world such as North America...

Pinctada Maxima
2013-04-25 16:49:52

Pinctada maxima is a species of pearl oyster, a marine bivalve mollusk belonging to the family Pteriidae, the pearl oysters. There are two different color varieties: the White lipped oyster and the Gold lipped oyster. These bivalves are considered to be the largest pearl oysters in the world. They have a very strong inner shell layer composed of nacre, also known as “mother of pearl”. They’re significant in the cultured pearl industry as they are used to produce South Sea pearls....

Flat Tree Oyster, Isognomon alatus
2013-04-25 16:28:02

The Flat Tree Oyster, Isognomon alatus, is a species of bivalve mollusk belonging to the family Isognomonidae. It can be seen along the Atlantic coast of North America, ranging from southern Florida to Brazil and Bermuda. This oyster has two thin and irregularly shaped valves that are joined by a long straight hinge. The exterior is sculpted by a large number of rough, concentric rings with loose flakes and varies in color from a pale brownish olive to a purplish black. The nacre on the...

Cockscomb Oyster, Lopha cristagalli
2013-04-17 11:50:41

Lopha cristagalli, also known as cockscomb oyster, is a species of marine bivalve mollusks within the family Ostreidae. This species has a shell with the potential to reach a maximum diameter of roughly 20.5 centimeters, 10 centimeters being the most common. The coloration varies from dark to light purple and is thick, strongly ribbed, and slightly inequitable shell. The shell inside is porcelaneous, normally a purplish-brown or whitish. The margins of the valves have a distinctive zig-zag...

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Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'