{"id":{"repo_id":"lethbridge","oai_identifier":"oai:opus.uleth.ca:10133/676"},"canonical_url":"https://search.dev.ndltd.org/etd/lethbridge/oai:opus.uleth.ca:10133/676","repository":{"repo_id":"lethbridge","name":"University of Lethbridge","base_url":"https://opus.uleth.ca/server/oai/request"},"display":{"title":"The impacts of agricultural chemicals and temperature on the physiological stress response in fish","abstract":"Fish 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.","abstract_html":"Fish 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.","abstract_has_math":false,"creators":["Quinn, Amie L.","University of Lethbridge. Faculty of Arts and Science"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007","date_published":"2007","updated_at":"2026-07-27T20:02:29Z","subjects":["Dissertations, Academic","Fishes -- Effect of stress on","Fishes -- Effect of chemicals on","Fishes -- Effect of temperature on","Fishes -- Effect of pesticides on"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10133/676"],"render_values":[{"text":"hdl:10133/676","href":null,"code":true}]}]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2007"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Dissertations, Academic","Fishes -- Effect of stress on","Fishes -- Effect of chemicals on","Fishes -- Effect of temperature on","Fishes -- Effect of pesticides on"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10133/676"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.other","label":"Dc Description Other","values":["Fish 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."]},{"key":"dc:title","label":"Title","values":["The impacts of agricultural chemicals and temperature on the physiological stress response in fish"]}]}],"canonical_facts":{"dc:date.issued":["2007"],"dc:description.other":["Fish 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."],"dc:identifier":["hdl:10133/676"],"dc:subject":["Dissertations, Academic","Fishes -- Effect of stress on","Fishes -- Effect of chemicals on","Fishes -- Effect of temperature on","Fishes -- Effect of pesticides on"],"dc:title":["The impacts of agricultural chemicals and temperature on the physiological stress response in fish"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T20:02:29Z"}