Portland State University. Department of Biology
Term of Graduation
Date of Publication
Master of Science (M.S.) in Biology
Carcinus maenas -- Oregon -- Yaquina Bay, Intertidal ecology -- Oregon -- Yaquina Bay, Biological invasions -- Oregon -- Yaquina Bay
1 online resource (71 pages)
This thesis examines the potential impact of the invasive green crab, Carcinus maenas, in Yaquina Bay, Oregon. I sampled the current extent of crab colonization in the intertidal zone of Yaquina Bay using a standardized trapping regimen in selected intertidal sites in August and September 1999. I also evaluated the potential impacts of C. maenas on the commercially important bivalve, Crassotrea gigas. Carcinus' preferred size ranges of C. gigas and other species were experimentally determined. Additionally, Carcinus species preference for C. gigas was examined in relation to two common bivalves, Mytilus trossolus and Macoma nasuta. Experiments were also conducted to see if C. maenas distinguished between two mussels species, M trossolus, the native mussel found in natural populations in Oregon, and M galloprovincialis, a popular aquaculture species in the Pacific Northwest. I also examined the potential impacts of C. maenas on meiofauna assemblages in a manipulative field experiment.
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Bassett, Zasha A., "The Impacts of the Introduced European Green Crab, Carcinus Maenas, on Selected Bivalves and Meiofaunal Communities" (2000). Dissertations and Theses. Paper 6362.