The Olympia oyster, Ostrea conchaphila, once abundant in West Coast estuaries of North America, is now uncommon in the San Francisco Bay, especially the South Bay. This study evaluated native oyster recruitment, at three sites each, in the South and Central Bay, using three experimental substrates: oyster shell strings, PVC recruitment tiles, and oyster shell bags. Oyster numbers and data on other settling organisms were recorded bi-monthly from October 2006 to October 2007. Oyster settlement was seasonal, major spatfall occurring between June 2007 and October 2007. Compared to the Central Bay, the South Bay was more productive for oyster settlement and had higher abundance of other hard shelled organisms. Of the three substrates, shell bags, which offered more surface area, were most productive. This research suggests Ostrea conchaphila restoration efforts in the South Bay may be successful, but more information is needed on conditions promoting long-term oyster survival and reproduction.
|School:||San Jose State University|
|School Location:||United States -- California|
|Source:||MAI 47/05M, Masters Abstracts International|
|Subjects:||Ecology, Environmental science, Aquatic sciences|
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