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  • Life History Trade-offs: The Effects of Habitat Selection on Columbian Black-tailed Deer Survival in Oregon

    Creator:
    Clark, Jessica S.
    Abstract:
    The assessment of habitat quality for wild populations requires evaluation of vital rates associated with the use of that habitat. Factors associated with bottom-up (forage) or top-down (predation) regulation and the relative contribution of these processes on ungulate populations are difficult to quantify, especially for a cryptic, but widely distributed...
    Resource Type:
    Masters Thesis
    Full Text:
    . DeWaine Jackson, Dr. Clinton Epps, Dr. Julia Jones, and Dr. Mark Harmon. My project would not be

  • Survival Rates and Cause-Specific Mortality of Mule Deer in South-Central Oregon

    Creator:
    Mulligan, Elizabeth M.
    Abstract:
    It is critical for wildlife managers to understand the population dynamics of a harvested species, particularly for ungulates, which are a valuable wildlife resource. Due to concerns that mule deer (Odocoileus hemionus) populations in Oregon were declining, more comprehensive data on population vital rates and the factors potentially affecting them...
    Resource Type:
    Masters Thesis
    Full Text:
    . DeWaine Jackson, for allowing me to join his research team, recognizing my desire to continue my

  • Ringtail (Bassariscus astutus) Survival, Home Range Size, and Rest Site Use in Southwest Oregon

    Creator:
    Somers, Lindsay N.
    Abstract:
    The ringtail (Bassariscus astutus) is a small, nocturnal, meso-carnivore that occupies mid-elevation forests in the southwest portion of Oregon. Ringtail are fully protected within Oregon, but a species of conservation concern as they may be vulnerable to habitat loss and fragmentation. Limited data exists regarding ringtail ecology in forested ecosystems,...
    Resource Type:
    Masters Thesis
    Full Text:
    iterations of this project. I would also like to thank my committee members DeWaine Jackson, Clint Epps and

  • Using Spatial Capture-Recapture to Estimate Density of Roosevelt Elk in Western Oregon

    Creator:
    Nelson, Jennifer E.
    Abstract:
    Spatial capture-recapture (SCR) is employed for estimating abundance and density of species, particularly those that are cryptic or solitary, and evaluating how population density varies with habitat. However, it is uncertain whether estimates are biased when applied to species that aggregate, such as elk (Cervus canadensis). Wildlife managers in the...
    Resource Type:
    Masters Thesis
    Full Text:
    friend, Rachel Crowhurst, and committee members John Bailey, Tabitha Graves, DeWaine Jackson, and Jim

  • Habitat Use of Female Columbian Black-tailed Deer in Western Oregon

    Creator:
    Schrautemeier, Timothy J.
    Abstract:
    Columbian black-tailed deer (Odocoileus hemionus columbianus) are important economically, ecologically, and culturally as an indigenous species in western Oregon. Oregon Department of Fish and Wildlife (ODFW) observed declines in black-tailed deer populations since the late 1980’s and attributes these declines to reduction in quality and availability of habitat, following the...
    Resource Type:
    Masters Thesis
    Full Text:
    members Dr. DeWaine H. Jackson, Dr. Matthew Betts and Dr. Clinton W. Epps for continual support and

  • Historic Survival Rates and Cause-Specific Mortality for Columbian Black-Tailed Deer in Southwest Oregon

    Creator:
    Groot, Kevyn A.
    Abstract:
    In contrast with other Odocoileus species, Columbian black-tailed deer (Odocoileus hemionus columbianus) population dynamics are not well understood throughout the species’ range. Concerns over apparent long-term population declines have prompted efforts to fill basic knowledge gaps including estimates of vital rates (fecundity, recruitment and survival) and cause-specific mortality. The Oregon...
    Resource Type:
    Masters Thesis
    Full Text:
    . DeWaine Jackson is responsible for my big break into the field of big game research, lent his biological

  • The ecology of Mountain Quail in Oregon

    Creator:
    Pope, Michael D. (Michael Dickens)
    Abstract:
    Mountain Quail (Oreortyx pictus) populations have declined in many areas of the western Great Basin during the past century. Yet the life history of this species is little known. From 1997 to 2000, I studied radio-marked Mountain Quail in Hell's Canyon in northeastern Oregon, in the Cascade Mountains of southwestern...
    Resource Type:
    Dissertation
    Full Text:
    assistance. To my committee members, Boone Kauffman, Dan Edge, Court Smith, Dewaine Jackson, and Antonio

  • Ecological relationships between Columbian white-tailed and black-tailed deer in southwest Oregon

    Creator:
    Whitney, Lowell W.
    Abstract:
    I examined ecological relationships and mechanisms of coexistence for sympatric populations of Columbian white-tailed (Odocoileus virginianus leucurus) and black-tailed deer (Odocoileus hemionus columbianus) in Douglas County, Oregon, from September 1997 to August 1998. Horseback transects were used to describe spatial distributions, population overlap, and habitat use for both species. Behavioral...
    Resource Type:
    Masters Thesis