The population has been recovering since 2003, with fishermen voluntarily limiting the catch to half the allowable to aid the revival. From the early 1980s, the fishery went into serious decline, due to the outbreak of an oyster parasite, Bonamia exitiosa, with the disease killing an estimated billion oysters between 20. In New Zealand, they are a prized delicacy, and harvested from March to August from the Foveaux Strait oyster fishery, which centres on the town of Bluff (hence the local name). Commercial importance Bluff oysters served on ice Bluff oysters at a restaurant In Chile its maximum controlled length is 87 mm. Its length is up to 105 mm, width up to 70 mm, and inflation up to 33 mm. In Chile it lives attached to hard rocky or muddy bottoms, from intertidal to about 8 meters deep, in enclosed bays or areas protected from strong waves. This bivalve is found from low tide to depths of up to 35 m. Practically, nowadays it only exists in the wild in one natural bank, Pullinque, a sector located in the Quetalmahue Gulf of Ancud which was declared a genetic reserve in 1982, and as a marine reserve in 2003. Whereas in Chile, its range limit is from Chiloé Island, Los Lagos region to Guaitecas Islands, Aysén region. chilensis has now spread to other areas of the Menai Strait and is regarded as an invasive species. Īlso, a self-sustaining population in the Menai Strait was deliberately introduced from the Fisheries Laboratory, Conwy, during the 1960s as an experiment to establish if they could form an alternative to the native oysters Ostrea edulis in fisheries, when the species was shown to be unsuitable because of low recruitment and vulnerability to parasites and pathogens the experiment was abandoned. This species is native to Chile and New Zealand. This species of flat oyster is a marine bivalve mollusc of the family Ostreidae. The dredge oyster, Bluff oyster or Chilean oyster ( Ostrea chilensis), is also known in Chile as ostra verde, is a species of bivalve mollusc in the family Ostreidae.
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