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The life history of Corophium salmonis in the Columbia River estuary

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dc.contributor.advisor Holton, Robert L.
dc.creator Wilson, Stephanie Lynn
dc.date.accessioned 2011-08-29T22:46:16Z
dc.date.available 2011-08-29T22:46:16Z
dc.date.copyright 1983-04-27
dc.date.issued 1983-04-27
dc.identifier.uri http://hdl.handle.net/1957/22943
dc.description Graduation date: 1983 en_US
dc.description.abstract The benthic amphipod Corophium salmonis was sampled seasonally from two sites (Desdemona Sands and Grays Bay) in the Columbia River estuary. Populations of C. salmonis at both sites were found to have a two generation per year life cycle, a spring generation and a fall generation. The spring generation juveniles were produced in May 1981. These juveniles then grew throughout the summer and produced the fall generation in July and August. The fall juveniles were the overwintering population which would then produce the next spring generation. Brood sizes and mature female lengths were both found to be larger for the spring broods than for the fall broods. The population of C. salmonis on Desdemona Sands disappeared from the site in September 1980 and reappeared in April 1981. These events coincided with density fluctuations at the Grays Bay site. It was also observed that salinity at the Desdemona Sands site varied more than salinities at the Grays Bay site especially during the winter. Higher salinities at the Desdemona Sands site may have been responsible for the migration of C. salmonis in and out of the Desdemona Sands habitat. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Amphipoda -- Columbia River Estuary (Or. and Wash.) en_US
dc.subject.lcsh Theses, OSU -- Oceanography en_US
dc.title The life history of Corophium salmonis in the Columbia River estuary en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Master of Science (M.S.) in Oceanography en_US
dc.degree.level Master's en_US
dc.degree.discipline Oceanic and Atmospheric Sciences en_US
dc.degree.grantor Oregon State University en_US
dc.description.digitization File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en_US
dc.description.peerreview no en_us

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