Shellfish growers have expressed interest in developing high-yielding oyster strains through selective breeding. This dissertation has three objectives to help determine the effects of genetic and environmental variation on production traits (body weight, survival, and yield) of Pacific oysters grown in the Pacific Northwest. Objective 1: Determine if relative family...
This report details the results of experimental plantings of Pacific oysters in four Oregon estuaries in 1947. "The ten cases of experimental Kumamoto seed received in l947 through the Washington State Department of Fisheries were divided among Coos Bay, Umpqua River, Yaquina Bay and Tillamook Bay. All plantings were made...
The report consists of notes of a conversation between Lowell D. Marriage of the Oregon Fish Commission and Jess Hayes, an oyster grower from Bay City, regarding Mr. Hayes' recollections of the history of Pacific oyster culture in Tillamook Bay. Mr. Hayes' account goes back to 1931 and gives estimated...
Different strains of Vibrio parahaemolyticus (Vp) in broth cultures and Vp-inoculated live Pacific oysters (Crassostrea gigas) were subjected to high pressure processing (HPP) at 241, 276, 310, and 345 MPa. Results showed Vp numbers were reduced by HPP in both pure culture and whole oysters. Vp inactivation was dependent on...
Published November 1978. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Under laboratory conditions, elevated temperatures accelerated production of gametes. However, when conditioning for spawning at elevated temperatures was
initiated early in the season (January-March), larval survival and number of spat collected were significantly lower than when conditioning was initiated in may or June. At elevated temperatures, broodstock oysters were fed...
Results of this study suggest that laboratory growth of full-sib families of five month old Pacific oyster spat can be predictive of growth to market size at different grow-out sites. Seven to ten millimeter spat were selected from each of fifteen full-sib families and commercially available polyploids. Each family was...
