Index Catalog // ScholarsArchive@OSU

Body Condition and Hormone Assessment of Eastern North Pacific Gray Whales (Eschrichtius robustus) and Associations with Ambient Noise

Creator:: Lemos, Leila S.
Abstract:: Anthropogenic activities have posed many threats to the oceans and marine life. Understanding how individuals are affected and physiologically respond to these threats is crucial and allows for management and conservation applications. I evaluated the overall health condition of a subpopulation of gray whales (Eschrichtius robustus) along the Oregon coast,...
Resource Type:: Dissertation
Full Text:: . Thank you to my graduate committee members, Dr. Kathleen Hunt, Dr. Joe Haxel, Dr. James Sumich, Dr

Intra‐ and inter‐annual variation in gray whale body condition on a foraging ground

Creator:: Soledade Lemos, Leila, Burnett, Jonathan D., Chandler, Todd E., Sumich, James L., and Torres, Leigh G.
Abstract:: Baleen whales store energy gained on foraging grounds to support reproduction and other metabolic needs while fasting for long periods during migration. Whale body condition can be used to monitor foraging success, and thus better understand and anticipate individual‐ and population‐level trends in reproduction and survival. We assessed the body...
Resource Type:: Article
Full Text:: foraging ground LEILA SOLEDADE LEMOS ,1,� JONATHAN D. BURNETT ,2 TODD E. CHANDLER,1 JAMES L. SUMICH ,3

Effects of body size on the survival and timing of emigration of newly metamorphosed Northern Red-legged frogs

Creator:: Chelgren, Nathan D.
Abstract:: The purpose of this study was to investigate the survival and movements of newly metamorphosed Northern Red-legged frogs (Rana aurora aurora) as they emigrated from two ephemeral breeding ponds. Quantifying survival and movement rates will be important to our understanding how changes to terrestrial and aquatic systems affect behavior and...
Resource Type:: Masters Thesis
Full Text:: the many landowners who were gracious in allowing me to work on their property: James Arnett, Durward

Environmental fluctuation and cohort strength of Dover sole (Microstomus pacificus and English sole (Parophrys vetulus)

Creator:: Hayman, Robert August
Abstract:: Models were developed that described cohort strength of female Dover sole (Microstomus pacificus) and female English sole (Parophrys vetulus) in stocks off the Columbia River as functions of environmental variables. The environmental variables considered were those that could hypothetically influence spawning success or survival. They included a spawning power index,...
Resource Type:: Masters Thesis
Full Text:: , good humor, and hospitality this work could not have been done. James D. Hall, Associate Professor of

Riverscape genetics of Oncorhynchus tshawytscha (Chinook salmon) in Siletz River, OR

Creator:: Davis, Chanté D.
Abstract:: Traditional analysis in population genetics evaluates differences among groups of individuals and, in some cases, considers the effects of distance or potential barriers to gene flow. However, many forces may shape genetic variation of organisms in riverine systems. Similarly complex research linking habitat heterogeneity and configuration to genetic structure has...
Resource Type:: Dissertation

A geographical framework for assessing longitudinal patterns in stream habitat and fish distribution

Creator:: Torgersen, Christian E.
Abstract:: New approaches are needed to quantify and understand spatial patterns of stream fishes and their environment. Concepts in riverine ecology emphasize the importance of thermal zones and gradual longitudinal changes in physical habitat and biota, but little is known about spatial variability within the river continuum. I present a conceptual...
Resource Type:: Dissertation

Amphibian communities and climate change : Where ecological processes meet evolutionary interactions

Creator:: Thurman, Lindsey L.
Abstract:: Forecasts of the impacts of climate change have traditionally focused on individual species and their phenotypes, phenology, or distribution. However, shifts in species distributions and the resulting reorganization of community composition represent an important violation to the assumption of species acting in isolation. Whereas species may respond individualistically to climate...
Resource Type:: Dissertation

Factors affecting the abundance of fall chinook salmon in the Columbia River

Creator:: Van Hyning, Jack M.
Abstract:: A study of the population ecology of Columbia River fall chinook salmon, Oncorhynchus tshawytscha (Walbaum), was made in an attempt to determine the cause of a serious decline in this run which occurred in the early 1950's. Fluctuations in abundance of major salmon runs the North Pacific were examined to...
Resource Type:: Dissertation

Bottom-up Drivers of Primary Producers and Predator Populations in Oregon Streams

Creator:: Kaylor, Matthew J.
Abstract:: Humans have drastically altered the physical habitat and food web structure of stream ecosystems. Two major impacts humans have had on Pacific Northwest streams are modification of streamside forests (as a result of agriculture, land development, and timber harvest), and declines in the return of wild anadromous salmon to headwater...
Resource Type:: Dissertation
Full Text:: research assistantship. Scholarships were provided by the James Sedell Graduate Scholarship, Flyfisher’s

ScholarsArchive@OSU

Body Condition and Hormone Assessment of Eastern North Pacific Gray Whales (Eschrichtius robustus) and Associations with Ambient Noise

Intra‐ and inter‐annual variation in gray whale body condition on a foraging ground

Effects of body size on the survival and timing of emigration of newly metamorphosed Northern Red-legged frogs

Environmental fluctuation and cohort strength of Dover sole (Microstomus pacificus and English sole (Parophrys vetulus)

Riverscape genetics of Oncorhynchus tshawytscha (Chinook salmon) in Siletz River, OR

A geographical framework for assessing longitudinal patterns in stream habitat and fish distribution

Amphibian communities and climate change : Where ecological processes meet evolutionary interactions

Factors affecting the abundance of fall chinook salmon in the Columbia River

Bottom-up Drivers of Primary Producers and Predator Populations in Oregon Streams

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