Index Catalog // ScholarsArchive@OSU

Time and energy budgets of a population of dippers (Cinclus mexicanus) during winter in the Cascade Range of Oregon

Creator:: Parsons, David R.
Abstract:: A time and energy budget was constructed for a population of dippers (Cinclus Mexicanus) in the Cascade Range of Oregon during winter. A total of 12,202 point observations of activity were made from nine observation blinds from 19 November 1973 to 10 February 1974. Approximately 50 percent of all observations...
Resource Type:: Masters Thesis

Prevalence, geographic distribution, and biology of a dungeness crab, Cancer magister, microsporidian parasite

Creator:: Childers, Richard K.
Abstract:: The microsporidian parasite Nadelspora canceri infects Dungeness crabs, Cancer magister, along the United States Pacific Northwest coast. The prevalence and seasonal variation of N. canceri in Dungeness crabs from Alsea Bay, Oregon, are described based on examination of 2991 crabs collected at monthly intervals from October, 1991 to June, 1993....
Resource Type:: Masters Thesis
Full Text:: would like to express my sincere appreciation to Dr. Robert Olson, my major professor, for his advice

Local weather, regional climate, and population dynamics of northern spotted owls in Washington and Oregon

Creator:: Glenn, Elizabeth M.
Abstract:: Since the early 1990s, declines in northern spotted owl (Strix occidentalis caurina) populations have been documented through extensive field surveys and range-wide demographic analyses. Although loss of late-successional forest has been credited as the primary cause for spotted owl population declines, environmental variation has also been shown to influence vital...
Resource Type:: Dissertation
Full Text:: Oregon Abstract approved: Robert G. Anthony Since the early 1990s, declines in

The effects of temperature and food availability on energy partitioning and growth in the pacific oyster Crassostrea gigas (Thunberg)

Creator:: Malouf, Robert E.
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Robert Edward MalouC for the

The relationships between fluctuations in oceanographic conditions, forage fishes, predatory fishes, predator food habits, and juvenile salmonid marine survival off the Columbia River

Creator:: Emmett, Robert L.
Abstract:: Salmonid run sizes are strongly affected by their early marine stage. Fully understanding the life history of salmonids means understanding how they interact with their marine environment and with other fishes. Changes in the biological and physical environment off the Columbia River region affects the distribution and abundance of predatory...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE DISSERTATION OF Robert L. Emmett for the degree of Doctor of Philosophy in

Influence of water temperature and beaver ponds on Lahontan cutthroat trout in a high-desert stream, southeastern Oregon

Creator:: Talabere, Andrew G.
Abstract:: The distribution of Lahontan cutthroat trout Oncorhynchus clarki henshawi was assessed in a high-desert stream in southeastern Oregon where beaver Castor canadensis are abundant. Longitudinal patterns of beaver ponds, habitat, temperature, and Lahontan cutthroat trout age group distribution were identified throughout Willow Creek. Three distinct stream segments were classified based...
Resource Type:: Masters Thesis

Home range and habitat use by Roosevelt elk in Olympic National Park, Washington

Creator:: Jenkins, Kurt Jeffrey
Abstract:: This research provides information on the distribution of an unexploited Roosevelt elk population in unaltered habitat in Olympic National Park. Radio-telemetry was used to document home range and habitat use by 11 adult cow elk in the Hoh Valley during March 1978, from 10 June-15 September 1978, and from 1...
Resource Type:: Masters Thesis
Full Text:: graduate committee, Dr. Edward Starkey, Dr. Robert Anthony, and Dr. Al Winward deserve special thanks for

A multi-trophic level examination of recreational impacts on a national wild and scenic river

Creator:: Wright, Kristopher Keith
Abstract:: Initially, components of an aquatic food web were examined to study impacts of recreational use on the aquatic ecology of Quartzville Creek, Oregon in 1995 and 1996. Measurements of the food web components consisted of observations of harlequin ducks (Histrionicus histrionicus), visual counts of the larval caddisfly Dicosmoecus gilvipes, benthic...
Resource Type:: Masters Thesis
Full Text:: the engine fire glowing. To the members of my graduate committee, Robert Jarvis and Gordon Matzke

Landscape-Level Approaches to Desert Bighorn Sheep (Ovis canadensis nelsoni) Conservation in a Changing Environment

Creator:: Creech, Tyler G.
Abstract:: Landscape characteristics can strongly influence demographic and genetic processes in wildlife populations. Climate change and human land use are causing many landscapes to change rapidly, and the effects on wildlife populations must be understood to properly manage these threats and design effective conservation strategies. In this dissertation, I explored the...
Resource Type:: Dissertation

The effects of natural fire and recreational disturbance on montane forest ecosystem composition, structure and nitrogen dynamics, Crater Lake National Park, Oregon

Creator:: Wilson, John K. (John Kevin)
Abstract:: Disturbance, whether natural or of human origin, modifies to varying degrees many ecosystem attributes. Fire is a natural process in the montane forests of southern Oregon but for much of the 20th century fire was viewed as an apocalypse and thus fervently suppressed. Effective natural resource management requires an understanding...
Resource Type:: Dissertation
Full Text:: dynamics. I thoroughly enjoyed Dr. Robert Gresswells’ weekly discussions and his ability to find clarity

ScholarsArchive@OSU

Time and energy budgets of a population of dippers (Cinclus mexicanus) during winter in the Cascade Range of Oregon

Prevalence, geographic distribution, and biology of a dungeness crab, Cancer magister, microsporidian parasite

Local weather, regional climate, and population dynamics of northern spotted owls in Washington and Oregon

The effects of temperature and food availability on energy partitioning and growth in the pacific oyster Crassostrea gigas (Thunberg)

The relationships between fluctuations in oceanographic conditions, forage fishes, predatory fishes, predator food habits, and juvenile salmonid marine survival off the Columbia River

Influence of water temperature and beaver ponds on Lahontan cutthroat trout in a high-desert stream, southeastern Oregon

Home range and habitat use by Roosevelt elk in Olympic National Park, Washington

A multi-trophic level examination of recreational impacts on a national wild and scenic river

Landscape-Level Approaches to Desert Bighorn Sheep (Ovis canadensis nelsoni) Conservation in a Changing Environment

The effects of natural fire and recreational disturbance on montane forest ecosystem composition, structure and nitrogen dynamics, Crater Lake National Park, Oregon

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