States in the 1970s have not naturalized, presumably because the temperature is too low for reproductive success. C. ariakensis grows faster than C. virginica but has a thinner shell, which may make it more susceptible to predators such as crabs; otherwise, it should be subject to the same predation pressures as C. virginica.

  • Little information is presently available on parasites or diseases of C. ariakensis in its native range. Histological examinations of C. ariakensis at various institutes have found a few protozoan parasites in groups known to cause mortality in oysters, including a haplosporidian (MSX-like) and a Bonamia parasite, which was associated with mortality of C. ariakensis and was probably the same parasite that caused widespread mortalities of the European oyster. Other parasites, including a putative Rickettsiales-like organism and herpes virus, have been found worldwide in numerous marine bivalves.

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