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  • Foraging ecology of migrant waterbirds, Lake Abert, Oregon

    Creator:
    Boula, Kathryn Marcile
    Abstract:
    Seven species of water-dependent birds (northern phalarope, Phalaropus lobatus; American avocet, Recurvirostra americana; Wilson's phalarope, P. tricolor; eared grebe, Podiceps nigricollis; ring-billed gull Larus delawarensis; California gull, L. californicus; and northern shoveler, Anas clypeata) were studied during the fall migrations of 1982 and 1983 to determine the diets and foraging...
    Resource Type:
    Masters Thesis

  • Site tenacity, mate retention and sexual dimorphism in Black Terns

    Creator:
    Stern, Mark A.
    Abstract:
    Between 1982-1984 I studied site tenacity and mate retention in Black Terns at Sycan Marsh, Lake County, Oregon. I banded 778 adult Black Terns and used this marked population to test the hypotheses that site tenacity and mate retention would be less for Black Terns which nest in variable marsh...
    Resource Type:
    Masters Thesis
    Full Text:
    . Southern, L.K., and W.E. Southern. 1979. Philopatry in Ring-billed Gulls. Proc. Colonial Waterbird Group

  • Use of wetlands in the Tulare Lake Basin by wintering ducks

    Creator:
    Coe, Holly N.
    Abstract:
    I evaluated the use of various wetlands by wintering ducks in the Tulare Lake Basin (TLB), California, during October 1982 - April 1983 and September 1983 - March 1984. Aerial waterfowl counts of the TLB were used to document spacial use patterns by ducks. Ground surveys on evaporation ponds in...
    Resource Type:
    Masters Thesis
    Full Text:
    selenium which has been associated with embryonic mortality and deformity in waterbirds (Ohlendorf et al

  • Bird community patterns of spring-seasonal and semi-permanent wetlands in the Sacramento Valley, California

    Creator:
    Harris, P. Dawn
    Abstract:
    Freshwater wetlands in the Sacramento Valley provide breeding, wintering, foraging and stopover habitat for migratory and resident birds. With a loss of 95% of historic freshwater wetlands, the restoration of wetlands on private land could provide important habitat for birds. Documentation and monitoring of bird use on previously restored wetlands...
    Resource Type:
    Masters Thesis

  • Ecology of female northern pintails during winter in the San Joaquin Valley, California

    Creator:
    Fleskes, Joseph P.
    Abstract:
    I radio-tagged 191 Hatch-Year (HY) and After-Hatch-Year (AHY) female northern pintails (Anas acuta) in the San Joaquin Valley (SJV), California and studied their movements, habitat use and survival during August March, 1991-94. Overall, 94.3% wintered in central California; the highest percentage left during the 1991 drought. Tulare Basin and Mendota...
    Resource Type:
    Dissertation