Index Catalog // ScholarsArchive@OSU

Planktivorous Auklets (Aethia pusilla and A. cristatella) nesting on St. Lawrence Island, Alaska as indicators of marine conditions in the northern Bering Sea

Creator:: Gall, Adrian
Abstract:: Monitoring reproductive success, prey species composition, and colony size of marine birds has been proposed as a method of assessing changes in marine systems that are otherwise difficult to sample (Cairns 1987). I measured inter-annual and intra-seasonal variability in reproductive parameters, taxonomic composition of the diet, and adult body condition...
Resource Type:: Masters Thesis
Full Text:: cristatella and A. Dusilla) Nesting on St. Lawrence Island. Alaska as Indicators of Marine Conditions in the

Direct and indirect effects of livestock grazing intensity on processes regulating grassland bird populations

Creator:: Johnson, Tracey N.
Abstract:: In grasslands, grazing by large ungulates can influence vegetation structure, composition, primary productivity, and ultimately, ecosystem functioning. While grazing represents a complex disturbance, grazing intensity largely determines the effects of grazing on vegetation. Structural and compositional changes in the plant community caused by grazing could have bottom-up effects on species...
Resource Type:: Dissertation
Full Text:: Tracey N. Johnson for the degree of Doctor of Philosophy in Wildlife Science presented on September 14

Evolutionary history and speciation of the genus Tragopan

Creator:: Islam, Kamal
Abstract:: A study of the phyletic relationships among five species of tragopans and an outgroup, the Blood Pheasant (Ithaginis cruentus), was conducted from 1987 to 1991. Biochemical, behavioral, and external morphologic characteristics were compared. A cladistic approach was used to compare the behavioral, biochemical, and external morphologic data collectively, as different...
Resource Type:: Dissertation
Full Text:: . Lawrence. Douglas F. Markle was most helpful in introducing me to the PAUP computer program and for the

Piscivorous colonial waterbirds in the Columbia River estuary : demography, dietary contaminants, and management

Creator:: Suzuki, Yasuko
Abstract:: Caspian terns (Hydroprogne caspia) and double-crested cormorants (Phalacrocorax auritus) nest in large colonies on East Sand Island in the Columbia River estuary, the largest known colonies for the two species in the world. Both species of piscivorous colonial waterbirds have been identified as predators with a significant impact on the...
Resource Type:: Dissertation
Full Text:: wildlife populations in the estuary (Buck et al. 2005, Johnson et al. 2007); however, information on

California condors in the Pacific Northwest : integrating history, molecular ecology, and spatial modeling for reintroduction planning

Creator:: D'Elia, Jesse
Abstract:: Reintroduction programs are increasingly being used to save animals from extinction and aid in their recovery. The California Condor (Gymnogyps californianus), one of the most endangered birds in the world, is a remarkable example of how reintroduction programs can help rapidly increase a species' population numbers and range following a...
Resource Type:: Dissertation
Full Text:: . Thanks also the other members of my committee—Dr. Matthew Betts, Dr. Clint Epps, Dr. Matthew Johnson

The effects of prescribed burning on small mammal communities in Lava Beds National Monument, California

Creator:: Frenzel, Richard Wilmarth
Abstract:: The effects of prescribed burning on the abundance, species composition, and reproduction of small mammals were studied over a one year period. Two burn areas were studied, one in sagebrush/ bunchgrass and one in cheatgrass. The short-term effects were studied using monthly mark-recapture trapping on two treatment and two control...
Resource Type:: Masters Thesis
Full Text:: Monument since approximately 1870, largely as a result of the suppression of fire (Smathers 1966, Johnson

Nesting ecology of mallards in the Willamette Valley of Oregon

Creator:: Rickerson, Eric V.
Abstract:: Although widely studied in many portions of North America, little is known about the specific habitat requirements of mallard ducks (Anas platyrhynchos) during the breeding season in western Oregon. I radio-marked 72 female mallards in the Willamette Valley of Oregon in March-April 1995-96 to document wetland habitat selection during pre-nesting...
Resource Type:: Masters Thesis
Full Text:: consume duck eggs and predation is usually the greatest cause of nest failure (Cowardin and Johnson 1979

Ecology of Great Basin Canada goose broods in southcentral Washington

Creator:: Eberhardt, Lester E.
Abstract:: The ecology of female Great Basin Canada geese (Branta canadensis moffitti) and their broods was studied during the rearing seasons of 1983 and 1984 on the Columbia River in southcentral Washington. The movements and activities of 41 adult female geese, marked with radio-transmitters, and their broods were monitored. Adult female...
Resource Type:: Dissertation
Full Text:: evaluated by ranking usage and availability measurements (Johnson 1980). This method was selected because I

A morphologic and morphometric analysis of the "Sorex vagrans species complex" in the Pacific Coast region

Creator:: Carraway, Leslie N.
Abstract:: Shrews of the "Sorex vagrans species complex" were classified into nine taxa on the basis of morphologic and morphometric analyses of 2,299 specimens from Washington, west of the Cascade Mountains in Oregon, and in the Coast Ranges of California. In Washington, Sorex monticolus setosus and S. m. obscurus occur west...
Resource Type:: Dissertation
Full Text:: . Kritzman, University of Puget Sound (PSM); M. L. Johnson, University of Washington (UW); T. E. Lawlor

Historic Survival Rates and Cause-Specific Mortality for Columbian Black-Tailed Deer in Southwest Oregon

Creator:: Groot, Kevyn A.
Abstract:: In contrast with other Odocoileus species, Columbian black-tailed deer (Odocoileus hemionus columbianus) population dynamics are not well understood throughout the species’ range. Concerns over apparent long-term population declines have prompted efforts to fill basic knowledge gaps including estimates of vital rates (fecundity, recruitment and survival) and cause-specific mortality. The Oregon...
Resource Type:: Masters Thesis
Full Text:: conditions during periods of parturition and lactation (Lawrence et al. 2004). Compared to local weather

ScholarsArchive@OSU

Planktivorous Auklets (Aethia pusilla and A. cristatella) nesting on St. Lawrence Island, Alaska as indicators of marine conditions in the northern Bering Sea

Direct and indirect effects of livestock grazing intensity on processes regulating grassland bird populations

Evolutionary history and speciation of the genus Tragopan

Piscivorous colonial waterbirds in the Columbia River estuary : demography, dietary contaminants, and management

California condors in the Pacific Northwest : integrating history, molecular ecology, and spatial modeling for reintroduction planning

The effects of prescribed burning on small mammal communities in Lava Beds National Monument, California

Nesting ecology of mallards in the Willamette Valley of Oregon

Ecology of Great Basin Canada goose broods in southcentral Washington

A morphologic and morphometric analysis of the "Sorex vagrans species complex" in the Pacific Coast region

Historic Survival Rates and Cause-Specific Mortality for Columbian Black-Tailed Deer in Southwest Oregon

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