Search Constraints

Start Over
Filtering by: Creator Olsen, Keith A. Remove constraint Creator: Olsen, Keith A. Academic Affiliation Fisheries and Wildlife Remove constraint Academic Affiliation: Fisheries and Wildlife File Format application/pdf Remove constraint File Format: application/pdf

Search Results

  • Spatial and temporal scales of genetic change in two overfished rockfishes

    Creator:
    Gomez-Uchida, Daniel
    Abstract:
    Pacific rockfishes (genus Sebastes) have attracted wide scientific and public interest from an evolutionary, fishery and conservation standpoints. This dissertation addresses several hypotheses involving spatial and temporal scales of genetic change in two overfished rockfishes, darkblotched (S. crameri) and canary rockfish (S. pinniger), using statistical analyses of genetic variation within...
    Resource Type:
    Dissertation
    Full Text:
    Rockfishes” Abstract approved: Michael A. Banks Pacific rockfishes (genus Sebastes

  • Factors associated with dusky Canada goose nesting and nest success on artificial nest islands of the western Copper River Delta

    Creator:
    Maggiulli, Nicole Marie
    Abstract:
    The population of dusky Canada geese (Branta canadensis occidentalis; hereafter, dusky geese) nesting on the western Copper River Delta (CRD) in south- central Alaska has been in decline since the late 1970s. In an effort to alleviate mammalian predation, increase nest success, and avoid a listing under the U.S. Endangered...
    Resource Type:
    Masters Thesis
    Full Text:
    appreciated assistance from Samantha Greenwood, Kelly Christiansen, Jonathan Thompson, Keith Olsen, Tad

  • A preliminary investigation of the spotted owl in Oregon

    Creator:
    Forsman, Eric D.
    Abstract:
    Between 1970 and 1974, data were collected on the distribution and biology of the spotted owl (Strix occidentalis) in Oregon. One-hundred and sixteen pairs and seven single birds were located. Spotted owls occurred throughout the mountains of western Oregon and on the east slope of the Cascade Range at least...
    Resource Type:
    Masters Thesis
    Full Text:
    degree of MASTER OF SCIENCE in FISHERIES AND WILDLIFE presented on October 22, 1975 Title: A

  • Seasonal dynamics of a riparian food web in the Oregon Coast Range mountains

    Creator:
    Robillard, Amanda Lynn
    Abstract:
    Riparian areas are eco-tones where aquatically- and terrestrially-derived insect biomass is exchanged between habitats, presenting consumers with new sources of energy, and resulting in a reciprocal subsidy. The relative contribution of energy exchange and the resulting impacts on vertebrate riparian consumers, such as fish or birds, remains poorly understood. We...
    Resource Type:
    Masters Thesis
    Full Text:
    Science presented on May 3, 2006. Title: Seasonal Dynamics of a Riparian Food Web in the Oregon Coast

  • Patterns of coastal cutthroat trout survival in two headwater stream networks

    Creator:
    Berger, Aaron M.
    Abstract:
    Mark-recapture methods were used to examine watershed-scale survival rates of coastal cutthroat trout (Oncorhynchus clarkii clarkii) from two headwater stream networks located in the foothills of the Cascade Mountain Range, Oregon. Differences in survival were explored among spatial (stream segment, stream network [main stem or tributaries], and watershed) and temporal...
    Resource Type:
    Masters Thesis
    Full Text:
    (length, growth, condition, density, and movement) factors. A total of 1,725 adult coastal cutthroat

  • Vegetation response to prescribed fire in mountain big sagebrush ecosystems at Lava Beds National Monument, California

    Creator:
    Ellsworth, Lisa M.
    Abstract:
    Anthropogenic land use alterations such as livestock grazing and fire suppression have greatly altered sagebrush grasslands of the Great Basin, facilitating invasion of exotic annuals, increases in woody species, and losses of native species. Much of the current research surrounding wildland and prescribed fire in sagebrush dominated ecosystems has focused...
    Resource Type:
    Masters Thesis
    Full Text:
    fire in sagebrush dominated ecosystems has focused on a persistent belief that fire in sagebrush

  • Wavelet analysis : linking multi-scalar pattern detection to ecological monitoring

    Creator:
    Anthony, Jill Ada Marie
    Abstract:
    Wavelet analysis is an analytical and modeling tool for optimizing sampling efficiency and accuracy, particularly in the context of designing long-term, large-scale monitoring plans. As a pattern analysis method that accommodates and preserves non-stationarity, wavelet analysis provides novel visualization and analytical capabilities for increased insight into interactions between multi-scalar heterogeneous...
    Resource Type:
    Dissertation
    Full Text:
    , particularly in the context of designing long-term, large-scale monitoring plans. As a pattern analysis method

  • 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:
    consecutive days following a nine day control period of no human activity. Elk alternated their activity

  • Evaluating the fatty acid signature technique for studies of diet composition inpiscivorous waterbirds

    Creator:
    Myers, Anne Mary
    Abstract:
    This research was designed to evaluate the Fatty Acid Signature (FAS) technique as a non-lethal alternative to more traditional, and sometimes destructive, methods of studying the diet composition of piscivorous birds. Specifically we tested the technique with Caspian terns (Hydroprogne caspia) which currently nest in large numbers in the Columbia...
    Resource Type:
    Masters Thesis
    Full Text:
    ) technique as a non-lethal alternative to more traditional, and sometimes destructive, methods of

  • Comparative foraging ecology of five species of Pacific seabirds : multi-scale analyses of marine habitat use

    Creator:
    Suryan, Robert
    Abstract:
    Seabirds are an integral component of marine ecosystems, however, because humans typically observe only snapshots of their lives at sea, our understanding of seabird foraging ecology is often limited. A more complete understanding of the ecological roles of seabirds and identification of critical foraging habitats requires the ability to follow...
    Resource Type:
    Dissertation
    Full Text:
    ecology is often limited. A more complete understanding of the ecological roles of seabirds and