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

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dc.contributor.advisor Bartholomew, Jerry
dc.creator Polley, Tamsen M.
dc.date.accessioned 2012-08-07T18:08:19Z
dc.date.available 2012-08-07T18:08:19Z
dc.date.issued 2012-05-31
dc.identifier.uri http://hdl.handle.net/1957/31921
dc.description.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 range of salmonid Myxozoans with similar morphology to M. squamalis and we suspect that some “M. squamalis” observations from different host species might be invalid. We provide a clear re-description of M. squamalis from its type host, O. mykiss (rainbow trout and steelhead). Our results confirm the morphological and morphometric data of the original description, which we supplement with a SSU rRNA gene sequence. Based on this sequence, we developed a PCR assay for specific detection of M. squamalis DNA in environmental water samples. We used the assay to compare parasite levels in the water influent and effluent from two hatcheries that rear different salmon and trout species. Our approach allows for early M. squamalis detection, infection level estimates, and estimates for environmental impacts based upon spore release. Early detection of Myxozoan infections is crucial to hatchery and wild fish management, as there is no documented treatment for infected fish. en_US
dc.language.iso en_US en_US
dc.subject Myxobolus squamalis en_US
dc.subject Salmon en_US
dc.subject Trout en_US
dc.subject Salmonid en_US
dc.subject Parasite en_US
dc.subject Hatchery en_US
dc.subject Epidemiology en_US
dc.subject sequenceT en_US
dc.title Supplemental Description of Myxobolus squamalis (Myxozoa) & Epidemiology of M. squamalis at Two Oregon Hatcheries en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Honors Bachelor of Science (HBS) en_US
dc.degree.level Bachelor's en_US
dc.degree.discipline Honors College en_US
dc.degree.grantor Oregon State University en_US
dc.contributor.committeemember Hallett, Sascha
dc.contributor.committeemember Vega-Thurber, Rebecca

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  • Honors College Theses
    The University Honors College requires a senior thesis for receipt of OSU’s most prestigious degree, the Honors Baccalaureate.

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