The beds are a permanent social structure unless they are separated physically and forcefully. Although water temperature affects growth rate, it appears to be irrelevant in site selection. Oysters inhabit areas of fairly constant turbidity and salinity. The oyster is eurytherma,l or able to withstand a wide range of temperatures including freezing temperatures. Certain lime or cement coatings are enhaced by use of the cultch.
Some Eastern oysters produce pearls as well.
Negative A major problem caused by the oyster is fouling, or attachment, often to boats. Chemical contamination is widespread and detrimental. Extensive efforts are being made in British Columbia to purify water to benefit all aquatic organisms. Inc. Reference written by Paula Osborne. Page last updated 12 February 1996.