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Microhabitat utilization by juvenile chinook salmon (Oncorhynchus tshawytscha) in relation to stream discharges in the lower American River of California

Creator:: Jackson, Terry A.
Abstract:: Habitats for juvenile chinook salmon (Oncorhynchus tshawytscha) were observed at a high flow during the spring of 1989 and at a low flow during the spring of 1991 in the lower American River of California. Parameters of microhabitats in eight macrohabitats were measured. Mean column water velocity and total water...
Resource Type:: Masters Thesis
Full Text:: development is dependent on water temperature. Higher temperatures decrease the development time of the eggs

Seasonal shifts in redband trout use of pools and their microhabitats in three central Oregon streams

Creator:: Hirsch, Christine L.
Abstract:: Redband trout density was examined in three forested streams in central Oregon at two scales, pool channel unit and microhabitat. Two streams were in roadless areas and one was in a "highly managed" watershed. At the larger spatial scale, trout displayed a seasonal shift in habitat use from early to...
Resource Type:: Masters Thesis
Full Text:: multiscale hierarchical procedure of selecting landscape features on a regional scale, water quality on a

The effects of acclimation and surface access on the resistance of fish to hypoxic stress

Creator:: Wirosoebroto-Hartadi, Retno Widaningroem
Abstract:: Rainbow trout (Salmo gairdneri) and bluegill (Lepomis macrochirus) were exposed to flows of water containing low DO concentrations produced by bubbling nitrogen through the water. Abrupt exposure of fish to critical DO concentrations (The standard dose response) and by a more gradual changing of DO levels (The "stepdown" approach) were...
Resource Type:: Masters Thesis
Full Text:: . Slots cut into the ends of the collars allowed water to exit the jugs at lip level, but blocked the

Growth and production of salmonids exposed to a stabilized Kraft mill effluent in experimental stream channels

Creator:: Mower, Barry Francis
Abstract:: 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 channels located near a kraft mill in Albany, Oregon. Growth rate...
Resource Type:: Masters Thesis

Predator-prey interactions under the influence of ammonia

Creator:: Woltering, Daniel Mark
Abstract:: Predator-prey interactions, as measured by the consumption and growth rates of a predator (Micropterus salmoides) and by the observed activities of both predator and prey (Gambusia affinis), were found to be sensitive to sublethal levels of ammonium chloride (reported as unionized ammonia NH₃). One bass and 15, 30, 60 or...
Resource Type:: Masters Thesis

The dynamics of exploited guppy populations exposed to dieldrin

Creator:: Liss, William J.
Abstract:: Sixteen populations of guppies (Poecilia reticulata) were established in laboratory aquariums. Eight populations were exposed to dieldrin at a mean concentration of 0.525 ppb in the water and 2.11 ppm in the food, tubificid worms. Eight populations received control water and food. All populations were fed three grams of tubificid...
Resource Type:: Masters Thesis

Discharge and its consequences to physical habitat and trout populations in the Deschutes River of central Oregon

Creator:: Walks, Deborah J.
Resource Type:: Masters Thesis
Full Text:: animated. Water Temperature Response to Discharge Changes Effect of discharge on water temperature was

BOD and toxicity of log leachates

Creator:: Atkinson, Sheridan William
Abstract:: A series of log storage experiments were conducted to determine whether leachates derived from water storage of logs are acutely toxic to fish. Log segments approximately 18 inches long and 16 inches in diameter were stored in tanks and held submerged for a period of 7 days. The holding water...
Resource Type:: Masters Thesis
Full Text:: synthetic samples. 29 3 The effect of mercury concentration and exposure time on mortality of rainbow trout

Influence of 2,4-dichlorophenol on the flavor of fish

Creator:: Palensky, John R.
Abstract:: 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. The three experimental apparatus used in this study were designed to deliver 250 ml/min...
Resource Type:: Masters Thesis

The effects of water and shade treatments on photosynthesis and root-rhizosphere respiration in young ponderosa pine

Creator:: Johnson, Theresa J.
Abstract:: Water treatments were applied to young ponderosa pine trees in the Eastern Cascades, Oregon during the 2003 growing season, and shade treatments were applied during the 2003 and 2004 growing seasons to understand how photosynthesis and soil respiration, particularly the root/rhizosphere fraction (R[subscript rrh]), would respond to increased moisture availability...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Microhabitat utilization by juvenile chinook salmon (Oncorhynchus tshawytscha) in relation to stream discharges in the lower American River of California

Seasonal shifts in redband trout use of pools and their microhabitats in three central Oregon streams

The effects of acclimation and surface access on the resistance of fish to hypoxic stress

Growth and production of salmonids exposed to a stabilized Kraft mill effluent in experimental stream channels

Predator-prey interactions under the influence of ammonia

The dynamics of exploited guppy populations exposed to dieldrin

Discharge and its consequences to physical habitat and trout populations in the Deschutes River of central Oregon

BOD and toxicity of log leachates

Influence of 2,4-dichlorophenol on the flavor of fish

The effects of water and shade treatments on photosynthesis and root-rhizosphere respiration in young ponderosa pine

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