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Filtering by: Subject Bird populations -- Oregon Remove constraint Subject: Bird populations -- Oregon Advisor Jarvis, Robert L. Remove constraint Advisor: Jarvis, Robert L. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Population ecology of the dusky Canada goose (Branata candensis occidentalis Baird)

    Creator:
    Sheaffer, Susan E.
    Abstract:
    Adult dusky Canada geese (Branta canadensis occidentalis Baird) were banded with plastic neck bands and observed on the winter range during 1985-92. Annual survival rates of adult geese estimated from observation data ranged from 76% to 85%. A model of Canada goose population dynamics was developed to illustrate relationships between...
    Resource Type:
    Dissertation
    Full Text:
    of Doctor of Philosophy in Wildlife Science presented on February 5, 1993 Title: Population Ecology

  • Ecology of mallard ducklings on Lower Klamath National Wildlife Refuge, California

    Creator:
    Mauser, David M.
    Abstract:
    The ecology of female mallards (Anas platyrhynchos) and their broods was studied during 1988-90 on Lower Klamath National Wildlife Refuge, California. Survival of 127 radio-marked ducklings from 64 broods was 0.18 to 10 days of life, and 0.37 and 0.34 to fledging for 1988, 1989, and 1990, respectively. For the...
    Resource Type:
    Dissertation
    Full Text:
    . Estimated recruitment (females fledged/adult female in the spring population), proportional change in