Oysters

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Oysters

• Eastern oyster (Crassostrea virginica)
• European (flat) oyster (Ostrea edulis)
• Kumamoto oyster (Crassostrea sikamea)
• Olympia oyster (Ostrea lurida)
• Pacific oyster (Crassostrea gigas)

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Olympia oyster (Ostrea lurida

• The Olympia oyster is found from Alaska to Baja
  California, although Washington is the only state
  that has produced Olympias on a commercial scale.
  Overfishing and pollution have reduced catch
  levels to less than one percent of former levels.
  A few growers in Washington state have had some
  success farming Olympias, but production remains
  limited.

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Pacific oyster (Crassostrea gigas)

• Comprises 98 percent of world farmed oyster
  production. Native to Japan, it is now farmed
  extensively in Washington state, British
  Columbia, Europe, and the Pacific Rim. Most
  growers use hatchery seeds and raise the oysters
  on the ocean bottom or on trays or ropes
  suspended in the water column.

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Purchase and Storing Tips

• If stored at 36-40 degrees F in a moist
  environment, oysters can be kept up to two weeks
  after they are collected, however, shelf life is
  shorter after spawning in the summer. As a
  rule, Olympia oysters command the highest price,
  followed by European oysters, Kumamotos, Pacific
  oysters, and Eastern oysters. By law, a
  live-oyster shipment must include identification
  of the oysters' origin and collection date it is
  illegal to discard this tag sooner than 90 days
  after delivery.

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PRODUCT FORMS

•   LIVE. SHUCKED MEATS Graded
• Petite (250-400/gal.),
• Extra Small (145-250/gal.)
• Small (96-144/gal.)
• Medium (64-95/gal.)
• Large (64 and under)
• FROZEN IQF meats and on the half shell
• SMOKED meats
• BREADED

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YIELD

• 5-14, depending on species and time of year
  (meat yield is lower after spawning).

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SIZE RANGE

• In shell Pacific oysters2 1/2 - 7 inches,
• Eastern oysters3 - 5 inches
• Kumamotos2 1/2 -3 inches
• Olympia oyster1/2 - 1 inch
• European flat oyster3 - 4 inches
• Meats 2/10 of an ounce to 2 ounces.

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MARKET NAME(S)

• In shell oysters marketed under various regional
  names (Blue Points, Hama Hamas, Wellfleets, Snow
  Creeks, Fanny Bays, Icy Bays, Hog Island, Pearl
  Bay etc.) or by species name (Olympias, Flats,
  Kumamotos etc.)

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WASHINGTON IN BRIEFStatistics

• Top 5 Agricultural Commodities (2002)            
             
• CommodityValue of receipts (thousand ) Percent
  of U.S. value
• Apples 977,508 63.3
• Dairy products 671,040 3.3
• Cattle and calves 614,385  1.6
• Potatoes 478,166 5.8
• Wheat 475,718   8.6
• Oysters 30,500 70.

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Shellfish Nursery Rearing Systems 1 Oyster Seed
on Cultch

• Seed that has successfully settled on shell or
  tubes is moved from setting tanks to nursery
  areas.
• Nurseries can be intertidal or subtidal.
• Rearing oyster seed on an intertidal beach
  hardens the seed, reduces predation and fouling
  but steps must be taken to prevent seed drying or
  being damaged by intense sunlight when it is
  exposed to the air between high tides. Intertidal
  nurseries are usually between the 1.5 and 2.5
  meter level.

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                                               Growing algae in special indoor tanks
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Nursery Systems Upwellers for Clam and Single
Oyster Seed

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                                                 Outdoor setting tanks at the hatchery
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Harvesting

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Harvesting
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TRIPLOID OYSTERSTriploid Oysters are a new type of oyster produced during hatchery spawning by increasing the number of chromosomes, the genetic material found in all living things. TRIPLOID OYSTERSTriploid Oysters are a new type of oyster produced during hatchery spawning by increasing the number of chromosomes, the genetic material found in all living things. TRIPLOID OYSTERSTriploid Oysters are a new type of oyster produced during hatchery spawning by increasing the number of chromosomes, the genetic material found in all living things. TRIPLOID OYSTERSTriploid Oysters are a new type of oyster produced during hatchery spawning by increasing the number of chromosomes, the genetic material found in all living things. TRIPLOID OYSTERSTriploid Oysters are a new type of oyster produced during hatchery spawning by increasing the number of chromosomes, the genetic material found in all living things.
 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
 
THE "ALL-SEASON OYSTER"Triploid Oysters have two important advantages over Diploids during their life cycle. In the Summer months when regular Diploid Oysters are spawny, Triploids remain firm, full and sweet. And they maintain this quality during the Fall, when spawned-out Diploid Oysters are watery and reduced in mass. THE "ALL-SEASON OYSTER"Triploid Oysters have two important advantages over Diploids during their life cycle. In the Summer months when regular Diploid Oysters are spawny, Triploids remain firm, full and sweet. And they maintain this quality during the Fall, when spawned-out Diploid Oysters are watery and reduced in mass. THE "ALL-SEASON OYSTER"Triploid Oysters have two important advantages over Diploids during their life cycle. In the Summer months when regular Diploid Oysters are spawny, Triploids remain firm, full and sweet. And they maintain this quality during the Fall, when spawned-out Diploid Oysters are watery and reduced in mass. THE "ALL-SEASON OYSTER"Triploid Oysters have two important advantages over Diploids during their life cycle. In the Summer months when regular Diploid Oysters are spawny, Triploids remain firm, full and sweet. And they maintain this quality during the Fall, when spawned-out Diploid Oysters are watery and reduced in mass. THE "ALL-SEASON OYSTER"Triploid Oysters have two important advantages over Diploids during their life cycle. In the Summer months when regular Diploid Oysters are spawny, Triploids remain firm, full and sweet. And they maintain this quality during the Fall, when spawned-out Diploid Oysters are watery and reduced in mass.
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THE WORLD'S LARGEST OYSTER HATCHERYTo meet our growing need for consistent, high quality oyster larvae and seed, we developed our own Quilcene, WA hatchery beginning in 1978. Here, advanced technology, experienced technicians, and a superb natural environment have combined to make it the world's largest, with a capacity in excess of 30 billion oyster larvae per year. This same quality is now available to provide other growers worldwide with a variety of oyster and clam species, plus algae feeds, and various support services. THE WORLD'S LARGEST OYSTER HATCHERYTo meet our growing need for consistent, high quality oyster larvae and seed, we developed our own Quilcene, WA hatchery beginning in 1978. Here, advanced technology, experienced technicians, and a superb natural environment have combined to make it the world's largest, with a capacity in excess of 30 billion oyster larvae per year. This same quality is now available to provide other growers worldwide with a variety of oyster and clam species, plus algae feeds, and various support services. THE WORLD'S LARGEST OYSTER HATCHERYTo meet our growing need for consistent, high quality oyster larvae and seed, we developed our own Quilcene, WA hatchery beginning in 1978. Here, advanced technology, experienced technicians, and a superb natural environment have combined to make it the world's largest, with a capacity in excess of 30 billion oyster larvae per year. This same quality is now available to provide other growers worldwide with a variety of oyster and clam species, plus algae feeds, and various support services.

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