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Oyster Production and Methods Summary
Oyster
Picture Gallery
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Pictures
courtesy of:
Loretta Campbell;
Matt Smith (PEIDAFA);
PEI Business Development
Inc. |
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Each summer oyster seed collectors
(drainage tile) are hung from lines in selected bays and
rivers on PEI. In late June - early July, oysters reproduce
releasing billions of tiny oyster larvae into the water.
Three to four weeks later, they cement themselves onto
the collectors.
By fall, the oyster seed will have grown large enough
to be removed from the collectors. The collectors are
harvested, "thrashed" to remove the oyster seed,
and the seed placed into the mesh bags for over-wintering
on the bottom.
The following spring the intermediate stage begins when
the bags are lifted off the bottom and placed in racks/cages
or suspended from longlines. By June the one year-old
oyster seed should be 15-20mm long.
Many oyster growers use rebar racks which are placed on
the bottom to support their mesh bags. This raises the
bags up into the water column where the food is more plentiful
resulting in faster growth. Other growers simply insert
Styrofoam floatation into the bags and attaching them
directly to buoyed longlines. Still other growers may
place the mesh bags into shelved cages with one mesh bags
being inserted per shelf. The cages can be hung from buoyed
longlines or left on the bottom.
Throughout the next year the oyster seed are graded and
the densities in the bags are reduced to prevent overcrowding
and to allow the oysters to begin to form the nice deep
cut that is prized in the market place. By the time they
reach two years old, the oysters should be 35-50mm long.
Many oyster growers spread their oysters on the bottom
for the last one to two years of the grow-out cycle. This
helps them to form the nice deep cut that is valued by
consumers.
The majority of PEI's oysters come from the traditional
fishery. However, an increasing number of Islanders are
looking to aquaculture to expand production of this highly
valuable shellfish. PEI is second to only British Columbia
in terms of oyster production. Canadian production is
projected to increase five-fold in the next few years
with the most of this increase coming from aquaculture.
PEI’s oyster aquaculture industry produces approximately
5.7-6 million pounds of oysters annually with a market
value of $ 6 million. Aquaculture PEI producers are well
positioned to contribute to this increase.
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