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Filtering by: Creator Oregon State University. School of Engineering Remove constraint Creator: Oregon State University. School of Engineering Academic Affiliation Fisheries and Wildlife Remove constraint Academic Affiliation: Fisheries and Wildlife Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • The Influence of Wildfire and Invasive Vegetation on Mule Deer

    Creator:
    Schuyler, Elizabeth
    Abstract:
    The western United States has experienced large-scale degradation due to land use and land cover changes, invasion of annual grasses, and expansion of woody plants into grass and shrublands and the resultant altered fire regimes. These landscape-scale changes have coincided with declining mule deer (Odocoileus hemionus) populations, making habitat loss...
    Resource Type:
    Dissertation
    Full Text:
    A DISSERTATION submitted to Oregon State University in

  • Seasonal floodplain wetlands as fish habitat in Oregon and Washington

    Creator:
    Baker, Cynthia F.
    Abstract:
    To begin to understand freshwater seasonal floodplain fish communities in the context of human alteration of the physical system, species introductions and wetland restoration efforts, I studied fish assemblages in fifteen seasonal floodplain wetlands within four geographic regions (coastal, upper Columbia River estuary, Puget Sound and eastern Oregon/Washington) in the...
    Resource Type:
    Dissertation
    Full Text:
    permanent collection of Oregon State University libraries. My signature below authorizes release of my

  • A steady-state model of ecological hierarchy

    Creator:
    Thompson, Grant Garrison
    Abstract:
    A generalized mathematical model of ecosystems is developed. The model begins with the general class of systems known as state-determined systems, in which the time-derivative of each state variable is a function of some subset of the set of all system state variables and .environmental parameters. A formal basis is...
    Resource Type:
    Dissertation
    Full Text:
    Hierarchy by Grant Garrison Thompson A THESIS submitted to Oregon State University in partial

  • Spatial and temporal characteristics of bottom-trawl fish assemblages of the continental shelf and upper slope of the Pacific Coast of the United States, 1977-1992

    Creator:
    Jay, Chadwick V.
    Abstract:
    Twenty-three bottom-trawl fish assemblages were identified from the relative biomass of 33 dominant species that occurred in the National Marine Fisheries Services' triennial trawl surveys over the continental shelf and upper slope off California, Oregon, and Washington from 1977 to 1992. The assemblages accounted for about 70% of the total...
    Resource Type:
    Dissertation
    Full Text:
    to Oregon State University in partial fulfillment of the requirements for the degree of

  • Trophic adaptations and relationships of rockfishes (Sebastes spp.) of Oregon

    Creator:
    Pequeño, Germán E.
    Abstract:
    A comparative analysis of structures related to capture and processing of food, in 624 specimens belonging to 31 species of Sebastes of Oregon was made. The structures studied were the following: the tooth-bearing bones (premaxillary, dentary, vomer, palatine); the maxillary, angular, articular, parasphenoid and glossohyal bones; the lower limb of...
    Resource Type:
    Dissertation
    Full Text:
    .) of Oregon. by Germgn E. Pequeno A THESIS Submitted to Oregon State University in partial

  • Evaluating the Efficacy of Predicting Bycatch Mortality Using Reflex Impairment through an Assessment of Crab Discards

    Creator:
    Yochum, Noëlle
    Abstract:
    All animals that interact with fishing gear are not necessarily captured, and all animals that are captured are not necessarily retained. Fishing practices and gear configuration, management regulations, and markets dictate which animals ultimately are retained or discarded. The impact of a fishery and the efficacy of management regulations can...
    Resource Type:
    Dissertation
    Full Text:
    to Oregon State University in partial fulfillment of the requirements for the

  • The effects of irrigation water withdrawals on macroinvertebrate community structure and life history strategies

    Creator:
    Miller, Scott W.
    Abstract:
    I used current water management practices in central and eastern Oregon and Washington as natural experiments to quantify the effects of irrigation water withdrawals on macroinvertebrate community structure and life history strategies. Reduced discharge had direct (e.g. decreased velocity and wetted habitat) and indirect (e.g. increased conductivity and temperature) effects...
    Resource Type:
    Dissertation
    Full Text:
    the permanent collection of Oregon State University Libraries. My signature below authorizes release

  • An analysis of the population dynamics of selected avian species

    Creator:
    Henny, Charles J.
    Abstract:
    The impact that pesticides may have had on the mortality rates and productivity rates of non-game birds during the last 25 years was evaluated by studying the population dynamics of 16 species. A mathematical model showing the relationships between population parameters that yielded stable populations was developed. The information needed...
    Resource Type:
    Dissertation
    Full Text:
    Charles Joseph Henny A THESIS submitted to Oregon State University in partial fulfillment of the

  • Long Term Trends and Sources of Sound in United States Waters

    Creator:
    Haver, Samara M.
    Abstract:
    Passive acoustic monitoring is a valuable tool for observing the status of marine environments. Comparisons of underwater soundscapes over temporal and spatial scales can provide data to inform marine conservation efforts, including protection of threatened and endangered species. This dissertation utilizes passive acoustic data collected via a broadly spaced array...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION submitted to Oregon State University in partial fulfillment of the requirements for the

  • The effects of sewage on the distribution and abundance of benthic animals in a Puget Sound bay

    Creator:
    Shapeero, William L.
    Abstract:
    The effects of discharged sewage on physico-chemical conditions and the distribution and abundance of marine benthic animals were studied in Shilshole Bay, a part of Puget Sound, off Seattle, Washington. For over 50 years prior to 1965, when this study was initiated, 87,300 pounds (32,400 pounds BOD) per day of...
    Resource Type:
    Dissertation
    Full Text:
    L. Shapeero A THESIS submitted to Oregon State University in partial fulfillment of the