The impacts of agricultural chemicals and temperature on the physiological stress response in fish

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dc.contributor.authorQuinn, Amie L.
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorHontela, Alice
dc.date.accessioned2008-09-26T14:58:22Z
dc.date.available2008-09-26T14:58:22Z
dc.date.issued2007
dc.degree.levelMasters
dc.descriptionix, 137 leaves : ill. ; 29 cm.en
dc.description.abstractFish are exposed to multiple stressors in their environment. The interactive effects of pesticide exposure and increased temperature on the physiological stress response were investigated in a comparative field study with cold-water (whitefish, Prosopium williamsoni) and cool-water (sucker, Catostomus) fish from the Oldman River, Alberta, Canada, and in a laboratory study with rainbow trout, Oncorhynchus mykiss. Physiogical stress indicators were measured, and exposure to pesticides was estimated using acetylcholinesterase (AChE) inhibition. Species-specific differences in AChE activities and responses of the physiological stress axis were detected in whitefish and suckers, suggesting that whitefish are a more sensitive species to temperature and pesticide stress. In vivo Dimethoate exposure inhibited AChE activity in various tissues and disrupted the physiogical stress response. Commercial Dimethoate, in vitro, caused a decrease in viability and cortisol secretion while pure grade Dimethoate did not. The results from this study can be used in predictions of fish vulnerability to stress.en
dc.identifier.urihttps://hdl.handle.net/10133/676
dc.language.isoen_USen
dc.publisherLethbridge, Alta. : University of Lethbirdge, Faculty of Arts and Science, 2007en
dc.publisher.departmentDepartment of Biological Studiesen
dc.publisher.facultyArts and Scienceen
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en
dc.subjectDissertations, Academicen
dc.subjectFishes -- Effect of stress onen
dc.subjectFishes -- Effect of chemicals onen
dc.subjectFishes -- Effect of temperature onen
dc.subjectFishes -- Effect of pesticides onen
dc.titleThe impacts of agricultural chemicals and temperature on the physiological stress response in fishen
dc.typeThesisen
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