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Filtering by: Creator Amsberry, Anthony C. Remove constraint Creator: Amsberry, Anthony C. Decade 1980-1989 Remove constraint Decade: 1980-1989 Rights Statement Copyright Not Evaluated Remove constraint Rights Statement: Copyright Not Evaluated

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  • Embryonic mortality in pubertal gilts

    Creator:
    Archibong, Anthony Effanga
    Abstract:
    An experiment was conducted to compare the reproductive performance and serum concentrations of progesterone and estrogen of mated first (n=18) and third (n=18) estrous gilts slaughtered in equal numbers on days 3, 15 and 30 postmating. Fertilization rate did not differ between mated first and third estrous gilts. Embryonic survival...
    Resource Type:
    Dissertation
    Full Text:
    THESIS OF ANTHONY E. ARCHIBONG for the degree of DOCTOR OF PHILOSOPHY in ANIMAL SCIENCE presented on

  • Ectomycorrhizal populations on a chronosequence of disturbed areas in the central Cascades

    Creator:
    Meyer, Michele Marie
    Abstract:
    A greenhouse bioassay was used to investigate effects of natural and manmade disturbances on native ectomycorrhizal populations of Douglas-fir and western hemlock on a steep southeast slope in the west central Cascade Mountains. Total and mycorrhizal root tips were counted on seedlings grown in soils collected from (a) two 100+...
    Resource Type:
    Masters Thesis

  • 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:
    Southcentral Washington Abstract approved: Redacted for privacy Robert G. Anthony V The ecology of female

  • Environmental contaminants and ecology of bald eagles in southcentral Oregon

    Creator:
    Frenzel, Richard Wilmarth
    Abstract:
    Food habits and levels of organochlorine compounds, lead, and mercury in resident and wintering bald eagles were studied in southcentral Oregon and California, 1979-83. Food habits were assessed by examination of castings from winter communal roosts, identification of 2938 prey items found at nest sites and foraging areas, and observations...
    Resource Type:
    Dissertation
    Full Text:
    : obert G. Anthony Food habits and levels of organochiorine compounds, lead, and mercury in resident and

  • Habitat use and densities of cavity-nesting birds in the Oregon Coast Range

    Creator:
    Nelson, S. Kim
    Abstract:
    I studied abundance patterns and habitat use of eight cavitynesting bird species in the Coast Ranges of Western Oregon during the spring and summer of 1985 and 1986. Three age classes of unmanaged Douglas-fir (Pseudotsuga menziesii) stands were selected for study: young (40-80 yrs), mature (80-200 yrs), and old-growth (>200...
    Resource Type:
    Masters Thesis
    Full Text:
    Densities of Cavity Nesting Birds in the Oregon Coast Ranges I I ')t -Abstract approved: Robert G. Anthony

  • Foraging strategies of Glaucous-winged Gulls : influences of sea otter predation

    Creator:
    Irons, David B
    Abstract:
    Diets and foraging strategies of Glaucous-winged Gulls were studied in areas with and without sea otters in the western Aleutian Islands, Alaska. Gulls foraged on invertebrates (e.g., sea urchins, limpets, chitons, mussels, and others) in the rocky intertidal community and on fish at sea; this study was conducted on gulls...
    Resource Type:
    Masters Thesis
    Full Text:
    1976, Zach and Falls 1976a, b, c, Davis 1977, Eggers 1977, Gill and Wolf 1977, Reichman 1977, and

  • Human-eagle interactions on the lower Columbia River

    Creator:
    McGarigal, Kevin
    Abstract:
    During the past decade (1978-87), breeding success and productivity of bald eagles on the lower Columbia River (LCR) has been far below state and regional averages and well below levels required for delisting under the Endangered Species Act by the Pacific States Bald Eagle Recovery Plan. Human disturbance was suspected...
    Resource Type:
    Masters Thesis
    Full Text:
    privacy Abstract approved: Robert G. Anthony During the past decade (1978-87), breeding success and

  • Ecology of breeding burrowing owls in the Columbia Basin, Oregon

    Creator:
    Green, Gregory A.
    Resource Type:
    Masters Thesis
    Full Text:
    Owls in the Col.unbia Basin, Oregon Abstract approved Robert G. Anthony The ecology of breeding

  • Breeding chronology, habitat utilization and nest-site selection of the long-billed curlew in northcentral Oregon

    Creator:
    Pampush, Geoffrey J.
    Abstract:
    Breeding ecology of long-billed curlews in Umatilla and Morrow Counties, Oregon, was studied during the spring and summer of 1978 and 1979. The first curlews were observed in the study areas on 16 and 19 March of 1978 and 1979, respectively. Earliest clutch completion and onset of incubation was on...
    Resource Type:
    Masters Thesis
    Full Text:
    special thanks to Robert Anthony, my advisor, who patiently provided latitude and direction. Lastly

  • Impacts of agricultural drainwater and contaminants on wetlands at Kesterson Reservoir, California

    Creator:
    Schuler, Carol Ann, 1946-
    Abstract:
    Kesterson Reservoir (Kesterson) received subsurface agricultural drainwater containing high levels of salts and other minerals from farmland in the San Joaquin Valley of California. Aquatic plants and invertebrates were sampled at Kesterson in May, August, and December of 1984. The reservoir supported a different biota and lower species diversity than...
    Resource Type:
    Masters Thesis
    Full Text:
    Robert G. Anthony Kesterson Reservoir (Kesterson) received subsurface agricultural drainwater