Index Catalog // ScholarsArchive@OSU

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

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

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

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

Breeding season habitat use and response to management activities by greater sage-grouse on Sheldon National Wildlife Refuge, Nevada

Creator:: Davis, Dawn M.
Abstract:: Greater Sage-Grouse (Centrocercus urophasianus) have experienced declines throughout their range over the last 50 years. Long-term declines in sage-grouse abundance in Nevada and Oregon have been attributed to reduced productivity. From 1995-1997, sage-grouse production on Sheldon National Wildlife Refuge (SNWR), Nevada was greater compared to Hart Mountain National Antelope Refuge...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Dawn M. Davis for the degree of

The energetic response to handling stress in juvenile coho salmon (Oncorhynchus kisutch)

Creator:: Davis, Lawrence E. (Lawrence Edward), 1965-
Abstract:: Various aspects of the energetic response to handling stress in juvenile coho salmon (Oncorhynchus kisutch) were examined. Fish were subjected to four different handling stressors in a Blazka-style respirometer. Stressed fish had rates of oxygen consumption that were higher than controls. The magnitude of the increase ranged from 139 to...
Resource Type:: Masters Thesis
Full Text:: fasted for 48 h prior to being placed into the respirometers to ensure a post-absorptive state (Davis

Development of microparticulate feeds and methods to improve acceptability of artificial diets by blue spotted goby larvae (Asterropteryx semipunctata)

Creator:: Clack, Brendan W.
Abstract:: An acceptable microparticulate diet for marine fish larvae may be defined as an artificial diet that contains, retains, and delivers the required nutrients to support survival and growth. Factors affecting ingestion rate of prey items by fish larvae include environmental factors such as light intensity, prey/background contrast, possible chemical cues,...
Resource Type:: Masters Thesis
Full Text:: and guidance throughout this research. I thank Michael Davis (Alaska NMFS) for sharing his

ScholarsArchive@OSU

Effects of perturbation on community structure and organization in aquatic microcosms

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

Sediment characteristics and the trophic status of four Oregon lakes

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

Breeding season habitat use and response to management activities by greater sage-grouse on Sheldon National Wildlife Refuge, Nevada

The energetic response to handling stress in juvenile coho salmon (Oncorhynchus kisutch)

Development of microparticulate feeds and methods to improve acceptability of artificial diets by blue spotted goby larvae (Asterropteryx semipunctata)

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