Index Catalog // ScholarsArchive@OSU

Juvenile survival and birth-site selection of Rocky Mountain elk in northeastern Oregon

Creator:: Rearden, Spencer N.
Abstract:: With declining populations and low calf recruitment in northeastern Oregon, much interest has been generated to study the survival rates and causes of mortality of Rocky Mountain elk (Cervus elaphus nelsoni). I investigated the causes of elk calf mortality and the effects of predation risk on birth-site selection by cow...
Resource Type:: Masters Thesis
Full Text:: summer of 2002-2004. Calves were sexed, aged, weighed, and fitted with radio-transmitting collars that

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:: warmer, wetter winters and hotter, drier summers in the 21st century

Environmental contaminants and ecology of bald eagles in southcentral Oregon

Creator:: Frenzel, Richard Wilmarth
Abstract:: Food habits and levels of organochlorine compounds, lead, and mercury in resident and wintering bald eagles were studied in southcentral Oregon and California, 1979-83. Food habits were assessed by examination of castings from winter communal roosts, identification of 2938 prey items found at nest sites and foraging areas, and observations...
Resource Type:: Dissertation
Full Text:: during summer months with the importance of ducks and fisheating birds increasing during the fall and

Breeding chronology, habitat utilization and nest-site selection of the long-billed curlew in northcentral Oregon

Creator:: Pampush, Geoffrey J.
Abstract:: Breeding ecology of long-billed curlews in Umatilla and Morrow Counties, Oregon, was studied during the spring and summer of 1978 and 1979. The first curlews were observed in the study areas on 16 and 19 March of 1978 and 1979, respectively. Earliest clutch completion and onset of incubation was on...
Resource Type:: Masters Thesis
Full Text:: Counties, Oregon, was studied during the spring and summer of 1978 and 1979. The first curlews were

Habitat use and densities of cavity-nesting birds in the Oregon Coast Range

Creator:: Nelson, S. Kim
Abstract:: I studied abundance patterns and habitat use of eight cavitynesting bird species in the Coast Ranges of Western Oregon during the spring and summer of 1985 and 1986. Three age classes of unmanaged Douglas-fir (Pseudotsuga menziesii) stands were selected for study: young (40-80 yrs), mature (80-200 yrs), and old-growth (>200...
Resource Type:: Masters Thesis
Full Text:: winters and warm, dry summers. Mean temperatures range from 00 C in winter to 24° C in summer (Franklin

Demography and habitat selection of northern spotted owls in post-fire landscapes of southwestern Oregon

Creator:: Clark, Darren A.
Abstract:: Several large wildfires in southwestern Oregon during the summers of 2001 and 2002 provided the opportunity to investigate the impacts of wildfire on northern spotted owls (Strix occidentalis caurina). I used radio-telemetry and demographic surveys to describe demographic performance and habitat selection of spotted owls in the areas burned by...
Resource Type:: Masters Thesis
Full Text:: the summers of 2001 and 2002 provided the opportunity to investigate the impacts of wildfire on

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:: determine if disturbances were degrading the quality of the roost site. During the summers of 2001 and 2002

Characteristics of northern flying squirrel and Townsend's chipmunk populations in second -and old-growth forests

Creator:: Rosenberg, Daniel K.
Resource Type:: Masters Thesis
Full Text:: characterized by mild, wet winters and warm, dry summers (Franklin and Dyrness 1973). I established live

Small-mammal herpetofauna abundance in riparian and upslope areas of five forest conditions

Creator:: Gomez, Douglas M.
Abstract:: I compared species composition and relative abundance of'small mammals and herpetofauna between riparian and upslope habitats among 5 forest types. Riparian- and upslope- associated species were identified based on capture frequency. Small mammal species richness was similar between stream and upslope habitats and among the 5 forest types. There were...
Resource Type:: Masters Thesis
Full Text:: summers (Brown and Curtis 1985). The annual precipitation ranges from 64 cm in the interior valleys to

Influence of limited access roads on Roosevelt elk in the Oregon Coast Range

Creator:: Cole, Eric K.
Abstract:: No studies have evaluated the effects of limited vehicle access on movements, survival and habitat use of Roosevelt elk (Cervus elaphus roosevelti) . We installed twenty gates, restricting motorized vehicle access by the public in seven discrete Road Management Areas (RMAs), comprising 35% of the study area. We radio-tracked 31...
Resource Type:: Masters Thesis
Full Text:: (sp = spring, ca = calving, su = summer, ru = rut, fa = fall, wi = winter), with 95% confidence

ScholarsArchive@OSU

Juvenile survival and birth-site selection of Rocky Mountain elk in northeastern Oregon

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

Environmental contaminants and ecology of bald eagles in southcentral Oregon

Breeding chronology, habitat utilization and nest-site selection of the long-billed curlew in northcentral Oregon

Habitat use and densities of cavity-nesting birds in the Oregon Coast Range

Demography and habitat selection of northern spotted owls in post-fire landscapes of southwestern Oregon

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

Characteristics of northern flying squirrel and Townsend's chipmunk populations in second -and old-growth forests

Small-mammal herpetofauna abundance in riparian and upslope areas of five forest conditions

Influence of limited access roads on Roosevelt elk in the Oregon Coast Range

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