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Filtering by: Creator Dyrness, C. T. Remove constraint Creator: Dyrness, C. T. Academic Affiliation Fisheries and Wildlife Remove constraint Academic Affiliation: Fisheries and Wildlife

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  • The relationship between the gut and the water-electrolyte balance of a marine teleost, Enophrys bison (Girard)

    Creator:
    Sleet, Randolph Bullock
    Abstract:
    In higher vertebrates, normal digestion and absorption by the gastrointestinal tract are dependent on the orderly and controlled transit of intraluminal contents. A relationship between fluid passage through the gut and absorption from the gut has yet to be examined in fish. In marine teleosts, the osmolality and ion concentration...
    Resource Type:
    Dissertation
    Full Text:
    scientific development. Appreciation is also due to Drs. C. Bond and T. Lais for serving as members of my

  • Food and habitat partitioning in two groups of coexisting Accipiter

    Creator:
    Reynolds, Richard T.
    Abstract:
    Sharp-shinned Hawks (Accipiter striatus), and Cooper's Hawks (A. coo erii) in the conifer forests in northwestern Oregon and A. striatus, A. cooperii, and Goshawks (A. gentilis) in the conifer forests of eastern Oregon were syntopic during the nesting season. In this study density of nests, nest success, and utilization of...
    Resource Type:
    Dissertation
    Full Text:
    ; principal among these individuals were E. C. Meslow, John A. Wiens, Thomas A. Gavin, Robert G. Anthony

  • Evidence for Cross-Seasonal Effects: Insights from Long-term Data on Northern Pintail

    Creator:
    Zarzycki, Megan C.
    Abstract:
    Cross-seasonal effects, where conditions in one season can have consequences in a following season, can have population-level implications for migratory species. To assess the presence of cross-seasonal effects on a migratory dabbling duck population, we examined the relative importance of habitat conditions in multiple seasons on the subsequent productivity of...
    Resource Type:
    Masters Thesis

  • 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

  • An Evaluation of Collaborative Salmon Fishery Management in Prince William Sound, Alaska

    Creator:
    Sheridan, Thomas M.
    Abstract:
    Collaborative decision-making is often promoted as a means to achieve socially acceptable and enduring solutions to natural resource management issues, and one that holds promise for resolving “wicked” problems. However, success rates for implementation of collaborative recommendations are unknown. This paper explores challenges to collaborative salmon fishery management in Prince...
    Resource Type:
    Capstone Project
    Full Text:
    Major Professor Robert T. Lackey Collaborative decision-making is often promoted as a means to achieve

  • Black bear population ecology

    Creator:
    Lindzey, Frederick Grier
    Abstract:
    Despite relatively mild weather, black bears (Ursus americanus) in southwestern Washington entered dens and remained for an average of 126 days. Bears entered their dens during a 5-week period which began on 21 October. A significant difference (P < 0.05) was found among the average dates of den entrance of...
    Resource Type:
    Dissertation
    Full Text:
    cm) (t = 1.709, 69 df, P < 0.05) and lower daily maximum temperatures (11 C) (t = 1.429, 69 df, P

  • Evaluating the Effects of a Parasitic Copepod (Salmincola californiensis) on the Performance of Juvenile Chinook Salmon (Oncorhynchus tshawytscha)

    Creator:
    Neal, William T.
    Abstract:
    Pacific salmon (Oncorhynchus spp.) rearing in lakes and reservoirs have been known to become heavily infected with an ectoparasitic copepod (Salmincola californiensis). Little is known about the factors that affect the parasite infection prevalence and intensity. However, previous research suggests that the parasite may negatively affect the fitness and survival...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ James T. Peterson Pacific salmon (Oncorhynchus spp.) rearing in lakes and reservoirs

  • The Influence of Scale in a Structured Decision Making Framework for Chinook Salmon Management

    Creator:
    McDonnell, Kevin N.
    Abstract:
    The goal of my dissertation was to explore how scale influences stream restoration prioritization strategies for an anadromous species and identify influential uncertainties that exist at different scales. My objectives were to (1) produce a comprehensive review of the Chinook salmon management challenges in California’s Central Valley and identify the...
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: ______________________________________________________ James T. Peterson The

  • Annual Costs of Wild Salmon Restoration Efforts in the Columbia River Basin

    Creator:
    Rice, Robert J.
    Abstract:
    The goal of this project was to estimate the total annual cost of salmon recovery efforts throughout the Columbia River Basin from all stakeholders, including direct and indirect costs. How much is spent on salmon recovery efforts each year in the Columbia River Basin? Depending on who you ask, you...
    Resource Type:
    Capstone Project
    Full Text:
    University Corvallis, OR 97331 Academic Advisor: Robert T. Lackey October 23, 2019

  • The Eco-hydrology of Tropical Peatlands Associated with Land Cover Changes

    Creator:
    Kurnianto, Sofyan
    Abstract:
    Tropical peatlands play an important role in global climate system by storing an immense of carbon that had been accumulated over thousands of years. Peatlands provide another important ecosystem service by regulating the hydrology. It is believed that peatlands act like a giant sponge by absorbing substantial amounts of water...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ James T. Peterson Tropical peatlands play an important role in global climate system