Vibrio coralliilyticus (Vcor) is a bacterial pathogen that is well adapted to shellfish hatcheries and is very pathogenic to the larvae of the Pacific oyster Crassostrea gigas. Vcor has been associated with several large scale larval mortality events in the Pacific Northwest that interrupt the supply of seed oysters available...
Estuaries are an important ecological link between terrestrial, freshwater, and marine systems, but are also subject to a variety of human pressures. Along the West Coast of the United States, shellfish aquaculture is one extensive use of estuarine tidelands. Specifically, Pacific oyster (Crassostrea gigas) aquaculture has been practiced for almost...
Although studies have shown that some marine invertebrates
can obtain a portion of their nutrition from dissolved and nonliving
particulate organic matter, the relative importance of such foods in
their diet has not been established. The success of oyster hatcheries
could be significantly improved if the diet of living algal...
The access regulation within the shellfish farming sector in France is based on a co-management system relying on both a national legislation, defining the general access conditions to maritime public grounds, and regional regulation systems, called “Regional Structural Schemes”. The latter specify the farming rules in cooperation with the administration,...
Experiments were carried out in fall and winter, 1990
and spring and summer, 1991 , to determine growth and
mortality of juvenile Pacific oysters {Crassostrea gigas)
in effluent from cultured coho salmon {Oncorhynchus
kisutch) , and effluent from salmon in which the red
macroalga Palmaria mollis was cultured. Ambient sea...
The management of the French shellfish industry has been based for a century and a half on a Territorial Use Right in Fisheries (TURF) scheme. This was meant to ensure control over access and use and was seen as a potential remedy for overexploitation. But the resource, i.e. shellfish nutrients,...
The ingestion, uptake, and metabolism of liposomes by juvenile
Pacific oysters (Crassostrea gigas) were studied by several methods in
an effort to assess their potential as encapsulating agents. Liposomes
composed of egg phosphatidylcholine-cholesterol-stearylamine (7:1:2)
formed readily and appeared stable in 20°/oo seawater. Radiotracer
studies with liposomes made with ¹⁴C-labeled cholesterol...
The microbial composition of Pacific oysters (Crassostrea gigas)
subjected to UV-treated seawater was determined by quantitative and qualitative means. A total of 2,779 microorganisms were identified from seawater and oysters during a 72 hour sampling period employing a computer assisted replica-plating technique. UV treatment effectively eliminated coliforms and Pseudomonas Type...