Index Catalog // ScholarsArchive@OSU

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:: Series, 41, 95-98 Hallett, S. L., & Bartholomew, J. L. (2006). Application of a real-time PCR assay to

Supplemental Description of Myxobolus squamalis (Myxozoa) & Epidemiology of M. squamalis at Two Oregon Hatcheries

Creator:: Polley, Tamsen M.
Abstract:: Myxobolus squamalis is a Myxozoan parasite of salmonids, which contributes to lowered fitness of hatchery and wild fish in the Pacific Northwest of North America. The only GenBank DNA sequence of M. squamalis is from Oncorhynchus tschawytscha (Chinook), but is not linked to a published morphological description. There is a...
Resource Type:: Honors College Thesis
Full Text:: , Khattra J, Hallett SL, Lester RJG, Longshaw M, Palenzeula O, Siddall ME, Xiao C. (2001). Recent advances

Studying the ancient parasitic cnidarian, Sphaerospora elegans, leads to better understanding of oligochaete diversity and myxozoan discovery

Creator:: Lehrburger, David J.
Abstract:: Myxozoans are microscopic parasites, related to corals and jellyfish. Most Myxozoa probably have two-host lifecycles that require a vertebrate (typically fish) and invertebrate (annelid or bryozoan). However no life cycle is known from the Sphaerospora lineage. I hypothesized that the life cycle of Sphaerospora elegans, a myxozoan parasite of three-spined...
Resource Type:: Honors College Thesis
Full Text:: primer Act1R (Hallett & Diamant, 2001) or myxozoan forward primer MYXGEN4f (Diamant et al., 2004) and

Predicting Fish Recruitment in the Northeast Pacific Using Climate Indices

Creator:: Riley, Shannon L.
Abstract:: Predicting recruitment, which is dependent on parent stock size and climate, is vital for forecasting productivity of fish stocks. The effects of climate can be analyzed via the use of climate indices. Three climate indices, the Pacific Decadal Oscillation, the North Pacific Gyre Oscillation, and the Oceanic Niño Index, describe...
Resource Type:: Honors College Thesis
Full Text:: predicting ecological processes (Hallett et al. 2004). Climate indices allow for longer-term predictions

Homelessness Among College Students in the United States: A Metasynthesis

Creator:: Clampitt, Sarah N.
Abstract:: Beginning in 2020, the SARS-CoV-2 pandemic contributed to an increase in housing insecurity among college students. As awareness around homelessness has increased, so has research aimed at better understanding the causes of homelessness and housing insecurity among college students, as well as opportunities to better support economic access to higher...
Resource Type:: Honors College Thesis
Full Text:: four-year universities (Bowers and O’Neill 2019; Hallett and Freas, 2017; Maurer 2017). When paired

The introduction of myxozoan parasites through the release of feeder goldfish (Carassius auratus)

Creator:: Karandashova, Sophia
Abstract:: Myxozoa have been found worldwide; these parasites infect a wide variety of hosts, but have been found most often in fish. Carassius auratus (goldfish), a popular aquarium fish and a widespread invasive species, have been identified as an intermediate host for several myxozoan species. Some myxozoan parasites are pathogenic and...
Resource Type:: Honors College Thesis
Full Text:: to Sascha Hallett and Stephen Atkinson; without their help and advice this project would not have

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:: infectious zone (Hallett, 2010). An HSI of 0.8 or greater was arbitrarily designated as hyper suitable to

The frequency of Ceratonova shasta genotypes in Manayunkia speciosa host genotypes

Creator:: Messmer, Madison M.
Abstract:: Ceratonova shasta is a myxozoan parasite that affects populations of salmonid species in the Pacific Northwest and is the cause of enteronecrosis. It has a complex life cycle involving two hosts; a definitive annelid host, Manayunkia speciosa (polychaete), and an intermediate salmonid host. Klamath River M. speciosa are genetically variable...
Resource Type:: Honors College Thesis
Full Text:: . APPROVED: Jerri Bartholomew, Mentor, representing Microbiology Sascha Hallett

0An assessment of the oviposition behavior of spotted-wing drosophila (Drosophila suzukii) in the presence of a novel management tool in Pinot noir grapes

Creator:: Blood, Rachel A.
Abstract:: Spotted-wing drosophila (SWD, Drosophila suzukii) is an invasive fruit fly species native of Southeast Asia. In vineyards, SWD lays eggs in damaged and intact fruit of the most soft-skinned varieties, and feeds on damaged fruits during the harvest period. Feeding and oviposition activities increase the likelihood of vectoring spoilage bacteria,...
Resource Type:: Honors College Thesis
Full Text:: . Sci. 67: 1358–1367. Renkema, J. M., D. Wright, R. Buitenhuis, and R. H. Hallett, 2016. Plant

An Investigation of Ceratomyxa shasta sporulation following death of itsChinook salmon host

Creator:: Soderlund, Krista M.
Abstract:: As pre-spawning mortality (PSM) in Chinook salmon in the Willamette River Valley becomes a more defined and examined area of study, more focus is granted to not only preserving the health of these fish, but also expanding knowledge concerning various pathogens that utilize the salmon as hosts and may be...
Resource Type:: Honors College Thesis
Full Text:: , whereas M. cerebralis prefers neural and cartilaginous tissue (Hallett and Bartholomew, 2012). Then, as

ScholarsArchive@OSU

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

Supplemental Description of Myxobolus squamalis (Myxozoa) & Epidemiology of M. squamalis at Two Oregon Hatcheries

Studying the ancient parasitic cnidarian, Sphaerospora elegans, leads to better understanding of oligochaete diversity and myxozoan discovery

Predicting Fish Recruitment in the Northeast Pacific Using Climate Indices

Homelessness Among College Students in the United States: A Metasynthesis

The introduction of myxozoan parasites through the release of feeder goldfish (Carassius auratus)

Assessing Annelid Habitat Suitability in the Lower Klamath River Basin

The frequency of Ceratonova shasta genotypes in Manayunkia speciosa host genotypes

0An assessment of the oviposition behavior of spotted-wing drosophila (Drosophila suzukii) in the presence of a novel management tool in Pinot noir grapes

An Investigation of Ceratomyxa shasta sporulation following death of itsChinook salmon host

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