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Filtering by: Creator Boyd, Chad S. Remove constraint Creator: Boyd, Chad S. Degree Field Wildlife Science Remove constraint Degree Field: Wildlife Science

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  • Factors influencing nest success of greater sandhill cranes at Malheur National Wildlife Refuge, Oregon

    Creator:
    Ivey, Gary L.
    Abstract:
    I developed a priori hypotheses and used logistic regression to model Greater Sandhill Crane (Grus canadensis tabida) nest success in relation to weather, habitat and management variables for cranes breeding at Malheur National Wildlife Refuge (MNWR) in southeast Oregon. My primary interest was to investigate the effects of habitat conditions...
    Resource Type:
    Masters Thesis
    Full Text:
    . Katie Dugger and Dr. Chad Boyd for their service as committee members. I am indebted to Carroll D

  • Estimation of Population Age Structure, Detection Probability, and Density of Red Tree Voles in Oregon

    Creator:
    Marks-Fife, Chad A.
    Abstract:
    Red tree voles (Arborimus longicaudus) are a unique species of Arvicoline rodent found in western Oregon and northwest California. Their preferred habitat is mature and old-growth coniferous forest dominated by Douglas-fir (Pseudotsuga menziesii). Tree voles are an important prey item for northern spotted owls and many other predators, but are...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Chad A. Marks-Fife

  • Foraging Niche Separation of Adélie (Pygoscelis adeliae) and Gentoo (P. papua) Penguins During the Breeding Season at Palmer Station, Antarctica

    Creator:
    Pickett, Erin
    Abstract:
    Climate-induced range overlap can result in novel interactions between similar species and potentially lead to competitive exclusion. The Western Antarctic Peninsula is one of the most rapidly warming regions on Earth and is experiencing a poleward climate migration. This transition from a polar to sub-polar environment has resulted in a...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________________________________ Ari S. Friedlaender Climate-induced range overlap can result in novel interactions between

  • Invasive bullfrog use of novel ephemeral habitats in the Pacific Northwest

    Creator:
    Cook, Megan Tetsuko
    Abstract:
    Invasive species are a major threat to global biodiversity. Understanding the mechanisms underlying successful invasions is imperative for developing effective management strategies. Plasticity in physiological, morphological, and behavioral traits could be an indicator of invasion potential in non-native species. The invasive American bullfrog (Lithobates catesbeianus) has recently been observed breeding...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Tiffany S. Garcia Invasive species are a major threat to global

  • The Soundcheck of the Sea : Comparing Marine Soundscapes on a Continental Scale

    Creator:
    Haver, Samara M.
    Abstract:
    Monitoring marine ambient sound using standardized methods supports assessments of ocean sound levels across widespread ecosystems. This thesis quantifies differences among coastal and deep-water marine soundscapes in the Atlantic and Pacific oceans. The sources of sound in a soundscape are compartmentalized into three components and compared over time and among...
    Resource Type:
    Masters Thesis
    Full Text:
    LIST OF TABLES Table Page Table 3.1. NRS deployment site number, location, collaborator(s

  • Habitat use and selection by sage grouse broods in southeastern Oregon

    Creator:
    Drut, Martin S.
    Abstract:
    In Oregon, sage grouse (Centrocercus urophasianus) were common in the eastern portion of the state. Since 1940 populations declined because of decreased productivity. The western subspecies (C. u. phaios) was listed as a candidate for threatened and endangered status in 1985 because of declines in Oregon and Washington and extirpation...
    Resource Type:
    Masters Thesis
    Full Text:
    southeastern Oregon AN ABSTRACT OF THE THESIS OF Martin S. Drut for the degree of Master of Science in

  • 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:
    2.5. Cumulative upwelling index (CUI; m3/s/100 m coastline) computed from the daily upwelling index

  • Population ecology of the Columbian white-tailed deer

    Creator:
    Gavin, Thomas Alan
    Abstract:
    A population of Columbian white-tailed deer (CWTD) was studied on a refuge (790 ha) in southwestern Washington during 1972-77. Quality of habitat was considered good for these deer and total population size remained between 164-230 as determined by mark-recapture methods during November. Population size declined significantly between the winters of...
    Resource Type:
    Dissertation
    Full Text:
    : Drs. B. E. Coblentz, P. S. Dawson and W. S. Overton. Most importantly, I thank Amy, Matthew and

  • Jumping in with Both Feet: Exploring Factors that Shape Juvenile Amphibian Movement

    Creator:
    Bredeweg, Evan M.
    Abstract:
    Investigation into how animals move within the landscape is important for both understanding of ecological processes and conservation management. Animal movement is important in shaping life history transitions, demographics, individual fitness, and species distributions. However, as landscapes become increasingly affected by human activities, movement becomes important as species navigate landscapes...
    Resource Type:
    Dissertation
    Full Text:
    approved: ________________________________________________________________ Tiffany S. Garcia Anita T

  • Leadership behavior and foraging strategies of a herd of Roosevelt elk inhabiting the Oregon Coast Range

    Creator:
    Marquez, Monica
    Abstract:
    A cow-calf herd of Roosevelt elk (Cervus elaphus roosevelti) resident to Indian Creek Research Center (ICRC), Oregon was observed June-August, 1985 and March-August, 1986. Cows at ICRC reproduced in alternate years; cows with calves led the herd a significantly greater number of times than cows without calves (1985, P <...
    Resource Type:
    Masters Thesis
    Full Text:
    information on the study site and Bruce Davitt for the microhistological analysis. I thank Drs. David S