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Prey swimming behavior and culture techniques for copper, Sebastes caurinus, and quillback rockfish, S. malinger

Creator:: Gilbert, Thom H.
Abstract:: Rotifers and brine shrimp (Artemia) are important prey items for rearing marine fish larvae. Their availability in the water column may be reduced when they are transferred to larval rearing tanks at lower temperature. In this study, Brachionus rotundiformis (SS-type) and Brachionus plicatilis (L-type) were semi-continuously cultured and fed on...
Resource Type:: Masters Thesis

Effects of perturbation on community structure and organization in aquatic microcosms

Creator:: Finger, Susan Everett
Abstract:: Aquatic communities consisting of guppies, amphipods, copepods, snails, nematodes, rotifers, protozoans, euglenoid flagellates, and other microorganisms were established in sixteen laboratory microcosms. Guppies were exploited at four different levels (0 percent, 10 percent, 20 percent, and 40 percent of the population biomass) with four communities at each level of exploitation....
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Susan Everett Finger for the

Sediment characteristics and the trophic status of four Oregon lakes

Creator:: Meyerhoff, Roger Dean
Abstract:: 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 developments of the lakes and their watersheds. The lakes chosen for this...
Resource Type:: Masters Thesis
Full Text:: STATUS OF FOUR OREGON LAKES Abstract approved: Gerald E. Davis There is evidence that recent

Modeling abiotic influences on disease dynamics for the complex life cycle of the myxozoan parasite Ceratomyxa shasta

Creator:: Ray, Robert Adam
Abstract:: Most parasites and their hosts live in a balance within their environment; however a disease outbreak can occur when either the parasite, host, or environment, are perturbed. Myxozoan parasites are associated with a wide variety of cultured and wild fish populations. Most myxozoans are relatively benign to their vertebrate host;...
Resource Type:: Dissertation
Full Text:: negative relationship among different measures of parasite density and diversity (e.g. Shannon’s H

Elevated temperature and the production of juvenile Chinook salmon (Oncorhynchus tshawytscha) in a model stream

Creator:: Bisson, Peter Andre
Abstract:: Temperature was elevated approximately 4° C in a model stream relative to an unheated, but otherwise similar control stream. The streams were located outdoors, received identical amounts of exchange water from a nearby creek, and followed natural diurnal and seasonal temperature cycles Juvenile spring chinook salmon (Oncorhynchus tshawytscha) were introduced...
Resource Type:: Dissertation
Full Text:: ) IN A MODEL STREAM Abstract approved: Gerald E. Davis Temperature was elevated approximately 40 C in

Production and behavioral interactions of salmonids in an experimental stream

Creator:: McIntyre, John D.
Abstract:: The behavior of two species of stream salmonids, juvenile coho salmon, Oncorhynchus kisutch (Walbaurn) and cutthroat trout, Salmo clarki clarki Richardson, was studied in terms of the time spent by individual fish in carrying out various activities. Studies were conducted from June 1968, through May 1969, at Berry Creek, a...
Resource Type:: Dissertation
Full Text:: INTERACTIONS OF SALMONIDS IN AN EXPERIMENTAL STREAM Abstract approved: Gerald E. Davis The behavior of two

Effects of temperature, ration, and size on the growth of juvenile steelhead trout, Salmo gairdneri

Creator:: Wurtsbaugh, Wayne Alden
Abstract:: The effects of temperature, temperature fluctuation, and fish size on the growth of juvenile steelhead trout (Salmo gairdneri) were studied in experiments which lasted 10 to 25 days. Groups of fish were fed at ration levels varying from near-starvation to repletion. Decelerating, curvilinear relationships between rates of food consumption and...
Resource Type:: Masters Thesis
Full Text:: THE THESIS OF presented on Gerald E. Davis The effects of temperature, temperature fluctuation, and

Food relations and production of cutthroat trout, Salmo clarki clarki Richardson, in an experimental stream

Creator:: McIntyre, John D.
Abstract:: Production, food consumption and food habits by groups of small, mixed and large sizes of cutthroat trout were studied in enriched and unenriched sections of the Berry Creek Experimental Stream, Oregon State University. Continuous introduction of sucrose and urea to portions of the stream resulted in heavy growth of Sphaerotilus...
Resource Type:: Masters Thesis
Full Text:: . Davis Production, food consumption and food habits by groups of small, mixed and large sizes of

Growth and food consumption of juvenile coho salmon exposed to natural and elevated fluctuating temperatures

Creator:: Everson, Larry B.
Abstract:: The growth and food consumption of juvenile coho salmon [Oncorhynchus kisutch (Walbaum)] exposed to natural and elevated fluctuating temperatures were studied in the laboratory with wild fish collected from a salmonid rearing stream. Control temperatures were similar to the temperature regime of a natural stream and the elevated temperatures were...
Resource Type:: Masters Thesis
Full Text:: approved: erald E. Davis The growth and food consumption of juvenile coho salmon [Oncorhynchus kisutch

Production of the snail Oxytrema silicula (Gould) in an experimental stream

Creator:: Earnest, Russell David
Resource Type:: Masters Thesis
Full Text:: . Davis A study was performed of the influence of enrichment on the production and food relations of the

ScholarsArchive@OSU

Prey swimming behavior and culture techniques for copper, Sebastes caurinus, and quillback rockfish, S. malinger

Effects of perturbation on community structure and organization in aquatic microcosms

Sediment characteristics and the trophic status of four Oregon lakes

Modeling abiotic influences on disease dynamics for the complex life cycle of the myxozoan parasite Ceratomyxa shasta

Elevated temperature and the production of juvenile Chinook salmon (Oncorhynchus tshawytscha) in a model stream

Production and behavioral interactions of salmonids in an experimental stream

Effects of temperature, ration, and size on the growth of juvenile steelhead trout, Salmo gairdneri

Food relations and production of cutthroat trout, Salmo clarki clarki Richardson, in an experimental stream

Growth and food consumption of juvenile coho salmon exposed to natural and elevated fluctuating temperatures

Production of the snail Oxytrema silicula (Gould) in an experimental stream

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