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  • Environmental DNA reveals cryptic parasite species and gives insight into their fish hosts

    Creator:
    Phillips, Kyle
    Abstract:
    Ceratonova shasta is a myxozoan fish parasite that impacts hatchery and wild populations of salmon and trout in the Pacific Northwest. Levels of the parasite in river water can be effectively monitored through direct filtration of parasite spores from water, extraction of total "environmental DNA" (eDNA), then quantitative polymerase chain...
    Resource Type:
    Honors College Thesis
    Full Text:
    _____________________________________________________________________ Julie Alexander, Committee Member, representing Microbiology

  • Assessing Annelid Habitat Suitability in the Lower Klamath River Basin

    Creator:
    Corrigan, Rory
    Abstract:
    This study assessed suitability of annelid habitats under current baseflow conditions and evaluated the mobility of suitable annelid substrates under a 2-year peak flushing flow. Outputs from a 2020 Bureau of Reclamation SRH-2D model were combined with field measurements of annelid presence/absence and habitat variables including depth, velocity and d50,...
    Resource Type:
    Honors College Thesis
    Full Text:
    _______________________________ Julie Alexander, Committee Member, representing Microbiology

  • Intestinal Lesions and Parasites Associated with Senescence and Prespawn Mortality in Chinook Salmon (Oncorhynchus tshawytscha)

    Creator:
    Nervino, Stephanie A.
    Abstract:
    Pre-spawning mortality (PSM) presents a major problem for population recovery of spring Chinook salmon (Oncorhynchus tshawytscha) in the Willamette River basin. In certain reaches and years, PSM has exceeded 90%. Histology has been used as the primary diagnostic method to investigate PSM in the Chinook Salmon, and a collection of...
    Resource Type:
    Masters Thesis
    Full Text:
    to Dr. Julie Alexander for her help with the statistical analyses of my data and composition of

  • Deschutes River Salmonid Risk of Enteronecrosis in a Changing Climate

    Creator:
    Yusova, Sofiya
    Abstract:
    Ceratonova shasta is an obligate endoparasite of salmonid fish that is endemic to the Pacific Northwest of North America. The parasite has a complicated lifecycle with two distinct spore stages and two obligate hosts, a salmonid and a freshwater annelid. Myxospores released from infected salmonid hosts, infect Manayunkia occidentalis (freshwater...
    Resource Type:
    Masters Thesis
    Full Text:
    Bartholomew, Julie Alexander, Ivan Arismendi, and John Christensen, I am grateful for giving me the