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  • 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
    Full Text:
    wetlands, the restoration of wetlands on private land could provide important habitat for birds

  • Nesting ecology of mallards in the Willamette Valley of Oregon

    Creator:
    Rickerson, Eric V.
    Abstract:
    Although widely studied in many portions of North America, little is known about the specific habitat requirements of mallard ducks (Anas platyrhynchos) during the breeding season in western Oregon. I radio-marked 72 female mallards in the Willamette Valley of Oregon in March-April 1995-96 to document wetland habitat selection during pre-nesting...
    Resource Type:
    Masters Thesis
    Full Text:
    of Master of Science in Wildlife Science presented on July 23, 2001. Title: Nesting Ecology of

  • 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
    Full Text:
    Ecology of female northern pintails during winter in the San

  • Behavioral constraints on harlequin duck population recovery from the Exxon Valdez oil spill in Prince William Sound, Alaska

    Creator:
    Rizzolo, Daniel J.
    Abstract:
    I investigated the relationship between harlequin duck (Histrionicus histrionicus) behavior and lack of recovery from the Exxon Valdez oil spill in Prince William Sound, Alaska. First, I evaluated the hypothesis that harlequin ducks in winter have little flexibility to increase foraging time in response to disturbance because they are constrained...
    Resource Type:
    Masters Thesis
    Full Text:
    Faculty, Dept. of Fisheries and Wildlife, Oregon State Univ., and Centre for Wildlife Ecology, Simon

  • Harlequin duck demography during winter in Prince William Sound, Alaska : effects of the Exxon Valdez oil spill

    Creator:
    Esler, Daniel
    Abstract:
    The 1989 Exxon Valdez oil spill was a major perturbation of nearshore habitats of Prince William Sound, a wintering area for harlequin ducks (Histrionicus histrionicus). This research was designed to evaluate harlequin duck population recovery from the oil spill from 1995 to 1998, using a demographic approach to assess both...
    Resource Type:
    Dissertation
    Full Text:
    work possible and for recognizing the importance of research in the process of restoration

  • Breeding habitat of harlequin ducks in Prince William Sound, Alaska

    Creator:
    Crowley, David W.
    Abstract:
    Breeding habitat of Harlequin ducks (Histrionicus histrionicus) was studied in eastern Prince William Sound, Alaska, during 1991 - 1993. Streams in Prince William Sound were surveyed for Harlequin ducks and monitored with mist nets. Physical characteristics of 24 Harlequin breeding streams were compared to those of 24 streams not used...
    Resource Type:
    Masters Thesis
    Full Text:
    William cund, Alask Abstract approved: (Robert L. Jary s, . of Wildlife Ecology) Breeding habitat of

  • Supplemental feeding influences reproductive success of the Hawaiian goose (Branta sandvicensis) at Haleakala National Park, Maui, Hawai'i

    Creator:
    Tamayose, Joy
    Abstract:
    Low reproductive success has been typical of high elevation populations of the Hawaiian goose (Branta sandvicensis) or nēnē. Researchers identified predation and inadequate nutrition as limiting factors. Reproductive success remained low in most years despite on-going predator control programs. I used a supplemental feeding program over two breeding seasons in...
    Resource Type:
    Masters Thesis
    Full Text:
    LITERATURE CITED Archibald, G. W. 1978. Supplemental feeding and manipulation of feeding ecology of

  • Habitat use, movements, and behavior of postbreeding female canvasbacks in Manitoba

    Creator:
    Devries, James H.
    Abstract:
    The habitat use, movements, and behavioral energetics of unsuccessfully breeding female canvasbacks (Aythya valisineria) were examined during the preflightless period in southern Manitoba during 1989-90. Following breeding attempts, unsuccessful females generally expanded their home range on the breeding area, remained there for up to one month, preferentially used large semipermanent...
    Resource Type:
    Masters Thesis
    Full Text:
    ), but the postbreeding­ premigrational ecology of females is less well known. The discovery by Haramis

  • 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:
    (Studholme and Sterling 1964, Tiner 1984), necessitating enhancement and restoration of remaining wetlands