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ScholarsArchive at Oregon State University
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1983-04-25 (iso8601)
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Long-term oceanographic and meteorological data were used to develop models that describe the observed variation in the recruitment of Pacific mackerel (Scomber japonicus) in the California
Current region. The models that were found to best...
1976-11-23 (iso8601)
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Successful fertilization of fresh steelhead trout, pink salmon, kokanee, chum salmon, fall chinook salmon, and coho salmon eggs with cryopreserved sperm is reported in this thesis. A mean percent fertilization greater than 50 percent was achieved...
1975-05-07 (iso8601)
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Population dynamics of coastal cutthroat trout were studied in a controlled-flow section of Berry Creek, Oregon, from August 1972 to August 1973. All trout except the underyearlings were tagged to allow movement, survival and weight change of...
1974-05-06 (iso8601)
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This is the first report on the susceptibility of salmonid fish to infection with the glochidia of the freshwater mussel Margaritifera. margaritifera using known numbers of parasites under controlled conditions. The relative susceptibility of six...
1974-06-10 (iso8601)
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The contribution of genetic effects to the variation in percent normal development observed in a bay mussel (Mytilus edulis L.) embryo bioassay was determined. A factorial breeding experiment
was accomplished in which 9 males were mated with 3...
1973-12-11 (iso8601)
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Six hundred and forty nutrias, Myocastor coypus (Molina), were collected near Corvallis, Oregon, and examined to determine criteria of their growth and reproduction. Two hundred and eighty-nine
were tagged, measured, and released to determine...
1968-06-27 (iso8601)
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The growth and production of brown trout, Salmo trutta Linnaeus, exposed to a concentration of 0.65 mg/l BOD (4.1 percent by volume) stabilized kraft mill effluent (KME) were studied from October 1973 until May 1974 in three experimental stream...
1974-12-03 (iso8601)
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The effects of temperature and ration on growth, food consumption, and food conversion efficiency of chum salmon, Oncorhynchus keta, in sea water were studied in two experiments conducted during the spring, summer, and fall, 1973, at the Oregon...
1974-08-29 (iso8601)
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The effects of disking, food plantings, and wheat plantings on a population of California quail (Lophortyx californicus) were studied from fall 1976 to spring 1978 on the E.E. Wilson Wildlife Area, Oregon. Twelve 16.2-ha study sites were...
1979-07-24 (iso8601)
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There is evidence that recent ecological changes in lakes and their watersheds can be detected from analysis of lake sediments. This study was initiated to correlate
changes in some sediment characteristics of four Oregon lakes with past cultural...
1976-06-17 (iso8601)
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A laboratory investigation was performed to determine the influence of 2,4-dichlorophenol on the flavor of fish. The study was conducted at the Oak Creek Fisheries Laboratory of the Department of Fisheries and Wildlife, Oregon State University....
1973-05-03 (iso8601)
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Reported are results of a study of otolith nuclei as a means to separate juvenile steelhead trout (Salmo gairdneri) from juvenile rainbow trout (S. gairdneri) which co-exist in the lower Deschutes River, Oregon. An intensive recreational fishery...
1973-05-04 (iso8601)
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This paper lists, and gives individual accounts of, those Oregon mammals that at some time have been referred to as being of a status other than common. Although rare and endangered wildlife species were listed on a national level in the United...
1972-04-28 (iso8601)
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The objective of this study was to determine whether wild populations of trout in the North Fork of the Middle Fork of the Willamette River can support a catch rate of 0.3-0.5 trout per hour at current levels of effort and to predict how different...
1977-02-22 (iso8601)
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The performances of newly-established gravel incubation systems designed to use unfiltered water for production of unfed salmon fry were evaluated at Netarts Bay, Oregon, and at Little Port Walter, Alaska.
Research was divided into two phases. The...
1977-04-12 (iso8601)
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1969-02-17 (iso8601)
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Glochidial development in freshwater mussels (Mararitifera margaritifera) located in the Siletz River, Oregon, was completed in 13 days at an average water temperature of 12.8 C. Glochidia were released by these mussels for 33 days, May 13 to June...
1972-10-10 (iso8601)
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Comparison of the toxic effects of six herbicide formulations in simultaneous moving water and static water bioassays showed that mortality of coho salmon, Oncorhynchus kisutch (Walbaum), was less in the moving water tests. The moving water tests...
1972-11-21 (iso8601)
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Natality of black-tailed deer in McDonald State Forest was determined by examination of 147 reproductive tracts. Yearlings collected from November of 1968 to May of 1970 had an average of 0.79 corpora lutea per doe, and adults 1.76 corpora lutea...
1973-01-09 (iso8601)
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Juvenile coho salmon (Oncorhynchus kisutch (Walbaum)) and aquatic invertebrates were subjected to experimentally increased, but naturally fluctuating, temperatures in a model stream channel. Coho of the 1969, 1970, and 1971 year classes were...
1971-10-18 (iso8601)
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Questions of assemblage persistence, resiliency arid continuity in time were investigated with data from seasonal bottom trawl surveys conducted by the Northeast Fisheries Center, Woods Hole,
Massachusetts, from 1963-1978. Cluster analysis proved...
1982-10-26 (iso8601)
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The most common method of estimating the economic demand for and value of recreational resources is the Hotelling-Clawson approach. This methodology developed as an empirical technique and was never adequately founded upon a conceptual analysis of...
1975-06-03 (iso8601)
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Selected zooplankton from three oligotrophic lakes in Oregon were studied to determine whether or not their instantaneous birth rates and densities could be used in lake classification. The species of zooplankton studied in their respective lakes...
1971-04-09 (iso8601)
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