The effects of selenium on the physiological stress response in fish

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dc.contributor.authorMiller, Lana L.
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorHontela, Alice
dc.date.accessioned2007-07-24T21:03:36Z
dc.date.available2007-07-24T21:03:36Z
dc.date.issued2006
dc.degree.levelMasters
dc.descriptionxiii, 150 leaves ; 29 cm.en
dc.description.abstractSelenium (Se), an essential element, can bioaccumulate and become toxic. The main toxicity symptom in fish, teratogenicity, is mediated by oxidative stress; however, little is known about the effect of Se on the physiological stress response (PSR). The effects of Se on the PSR and oxidative stress parameters were investigated in rainbow trout, brook trout, and white suckers. The PSR was activated by acute and sub-chronic laboratory exposures to NaSeO3, but not exposure to environmental levels of Se. Species-specific sensitivity to Se may be explained by biochemical differences. Rainbow trout (exhibit oxidative damage with Se exposure) have greater GSH reserves (cycles with Se causing oxidative stress) than brook trout. Selenium in agricultural drain water did not accumulate to dangerous levels in white suckers, but additional stressors (e.g. pesticides) were present. Differences in sensitivity to Se may alter competitive interactions between species, changing community compositions and putting additional pressure on threatened species.en
dc.identifier.urihttps://hdl.handle.net/10133/397
dc.language.isoen_USen
dc.publisherLethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2006.en
dc.publisher.departmentDepartment of Biological Sciencesen
dc.publisher.facultyArts and Scienceen
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en
dc.subjectDissertations, Academicen
dc.subjectSelenium -- Environmental aspectsen
dc.subjectFishes -- Effect of stress onen
dc.subjectFishes -- Effect of chemicals onen
dc.titleThe effects of selenium on the physiological stress response in fishen
dc.typeThesisen
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