Index Catalog // ScholarsArchive@OSU

Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon

Creator:: Wiens, J. David
Abstract:: The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________________________ Robert G. Anthony Eric D. Forsman The federally threatened northern spotted owl (Strix

The effects of burning in mountain big sagebrush on key sage grouse habitat characteristics in southeastern Oregon

Creator:: McDowell, Michelle K. D.
Abstract:: Sage grouse are a species of concern because their abundance, distribution, and productivity have declined during the past century. Sage grouse productivity has been linked to specific habitat components including particular forbs and native bunchgrasses. Studies on the effects of fire were conducted in Southeastern Oregon in mountain big sagebrush...
Resource Type:: Masters Thesis
Full Text:: , Dave Pyke, and Bruce Coblentz, I thank you for your logistical support. Thank you Mark Keller for

Relationship between habitat changes and productivity of sage grouse at Hart Mountain National Antelope Refuge, Oregon

Creator:: Coggins, Kreg A.
Abstract:: From 1987-1997, Oregon State University conducted studies at Hart Mountain National Antelope Refuge (HMNAR) to better understand the relationship between grouse productivity and key habitat components. Early studies indicated sage grouse habitat preference and reproductive success were related to particular forbs (including legumes and milky juice composites) and structural characters...
Resource Type:: Masters Thesis
Full Text:: Dyke, G. Keister, and K. Durbin of the Oregon Department of Fish and Wildlife for their advice

Occupancy rates and habitat relationships of northern goshawks in historic nesting areas in Oregon

Creator:: Desimone, Steven M.
Abstract:: The ability of northern goshawks (Accipiter gentilis) to persist in intensively managed and selectively harvested forest habitats is largely unknown. To address the concern that populations of northern goshawks in eastern Oregon may be declining in response to habitat alteration, I studied occupancy rates and habitat relationships of nesting goshawks...
Resource Type:: Masters Thesis
Full Text:: addition to valuable guidance given by committee members Mike Collopy, Dave Perry, and Chuck Meslow, my

Abundance and habitat associations of Washington ground squirrels in north-central Oregon

Creator:: Greene, Eric
Abstract:: Much of the Columbia River Basin has been cultivated for agriculture, which has reduced and fragmented the native shrub-steppe habitats. As a result, the range of the Washington ground squirrel (Spermophilus washingtoni) has been significantly reduced, prompting the states of Washington and Oregon to review their status. Consequently, I investigated...
Resource Type:: Masters Thesis
Full Text:: redacted for privacy. Robert G. Anthony Much of the Columbia River Basin has been cultivated for

Evaluating space use and pesticide exposure risk for burrowing owls in an agricultural environment

Creator:: Gervais, Jennifer A.
Abstract:: Large burrowing owl (Aihene cunicularia) populations exist in areas of intensive agriculture in California, and pesticide exposure has been identified as a potential threat to population persistence. I evaluated breeding season use of agricultural fields by adult male owls using radio telemetry, and examined egg contaminant residues to estimate population-level...
Resource Type:: Dissertation
Full Text:: : Robert G. Anthony Large burrowing owl (Aihene cunicularia) populations exist in areas of Intensive

An Investigation into the Distribution, Residency Patterns, Population Connectivity, and Abundance of Blue Whales (Balaenoptera musculus) in New Zealand

Creator:: Barlow, Dawn R.
Abstract:: Species conservation depends on robust population assessment. Data on population abundance, distribution, and connectivity are critical for effective management, especially as baseline information for newly documented populations. I describe a pygmy blue whale (Balaenoptera musculus brevicauda) population in New Zealand waters with year-round presence that overlaps with industrial activities. This...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Leigh G. Torres

Behavioral responses of Rocky Mountain Elk (Cervus elaphus) to recreational disturbance

Creator:: Naylor, Leslie M.
Abstract:: I measured responses of free-ranging Rocky Mountain elk (Cervus elaphus) to recreational disturbance at Starkey Experimental Forest and Range, Oregon from April to October, 2003 and 2004. Resting, feeding, and travel activities of 13 cow elk were recorded at 5-minute intervals using Actiwatch™ motion sensors. Elk were subjected to four...
Resource Type:: Masters Thesis
Full Text:: (Cervus elaphus) to recreational disturbance Abstract approved: Robert G. Anthony

Fine scale foraging behavior of gray whales in relation to prey fields and vessel disturbance along the Oregon Coast

Creator:: Sullivan, Florence A.
Abstract:: The desire to understand the spatial and temporal drivers of animal behavior and distribution relative to scale is central to movement ecology. Optimal foraging theory states that a predator should continue exploiting a patch until it is no longer profitable to do so. As human developments increasingly encroach on the...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ Leigh G. Torres The desire to understand the spatial and temporal drivers of animal

Disturbance and roosting ecology of California brown pelicans (Pelecanus occidentalis californicus) on East Sand Island in the Columbia River Estuary

Creator:: Wright, Sadie K.
Abstract:: The California brown pelican (Pelecanus occidentalis californicus) is listed as an endangered species under the U.S. Endangered Species Act. The Recovery Plan for this subspecies outlines the need to "Assure long-term protection of adequate food supplies and essential. . .roosting. . . habitat throughout the range." I investigated the effects...
Resource Type:: Masters Thesis
Full Text:: Columbia River Estuary. Abstract approved Robert G. Anthony The California brown pelican (Pelecanus

ScholarsArchive@OSU

Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon

The effects of burning in mountain big sagebrush on key sage grouse habitat characteristics in southeastern Oregon

Relationship between habitat changes and productivity of sage grouse at Hart Mountain National Antelope Refuge, Oregon

Occupancy rates and habitat relationships of northern goshawks in historic nesting areas in Oregon

Abundance and habitat associations of Washington ground squirrels in north-central Oregon

Evaluating space use and pesticide exposure risk for burrowing owls in an agricultural environment

An Investigation into the Distribution, Residency Patterns, Population Connectivity, and Abundance of Blue Whales (Balaenoptera musculus) in New Zealand

Behavioral responses of Rocky Mountain Elk (Cervus elaphus) to recreational disturbance

Fine scale foraging behavior of gray whales in relation to prey fields and vessel disturbance along the Oregon Coast

Disturbance and roosting ecology of California brown pelicans (Pelecanus occidentalis californicus) on East Sand Island in the Columbia River Estuary

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