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Oysters are classified to be a part of the Ostreacea family, in the bivalve class and part of the phylum Mollusca. Oysters are shellfish that are born individually but grow up to build reefs. Oysters are born drifting on tides and are free swimming with a vertical mobility, however their locomotion quickly changes when oyster reefs secrete a smell.
Oysters feed on suspended phytoplankton and other organic matter. Disruption of the filter feeding by oysters can lead to a decrease in the elimination of organic matter from the water column and increase phytoplankton abundance. This in turn may lead to seasonal anoxia, which could increase mortality for other estuary animals, such as fish. [5]
Some oysters also harbor bacterial species which can cause human disease; of importance is Vibrio vulnificus, which causes gastroenteritis, which is usually self-limiting, and cellulitis. Cellulitis can be severe and rapidly spreading, requiring antibiotics, medical care, and in some severe cases amputation.
For more than a decade along the East Coast and Gulf of Mexico, millions of farmed oysters, which are grown in cages or bags in tidal areas, have fallen victim to Sudden Unusual Mortality Syndrome ...
This means if the water around them was contaminated with oil and the dispersant used to get rid of the oil, then these chemicals were collected by the oysters as they filtered the water. [32] This is cause for great concern that the oysters are being killed by the toxins in the dispersant, as well. [32]
Oysters are saltwater bivalve mollusks, known for being filter feeders, meaning that they get their nutrition from extracting algae and other tiny organisms from the water surrounding them.
PSP affects those who come into contact with the affected shellfish by ingestion. [1] The toxins responsible for most shellfish poisonings—mainly saxitoxin, although several other toxins have been found, such as neosaxitoxin and gonyautoxins I to IV—are water-insoluble, and heat- and acid-stable.
Manila clams and Washington state oysters. Similarly, a recall was issued in Washington state on Dec. 12 for oysters and clams shipped within Washington state and California. The FDA expanded the ...