Effects of environmental contaminants on the stress response of rainbow trout (Onchorhynchus mykiss) and brown bullhead (Ameiurus nebulosus)

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Effects of environmental contaminants on the stress response of rainbow trout (Onchorhynchus mykiss) and brown bullhead (Ameiurus nebulosus)

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dc.contributor.advisor Bernier, Nicholas
dc.contributor.author Cho, Steve Dong
dc.date 2012-08-22
dc.date.accessioned 2012-09-06T20:06:33Z
dc.date.available 2012-09-06T20:06:33Z
dc.date.issued 2012-09-06
dc.identifier.uri http://hdl.handle.net/10214/3941
dc.description.abstract The accumulation of persistent contaminants is a significant issue for the health of aquatic environments. This study aims to determine the effects of polycyclic aromatic hydrocarbons (PAH) on the stress response of fish by monitoring plasma cortisol levels and the expression of key hypothalamic-pituitary-interrenal (HPI) stress axis regulators. Injection of benzo(a)pyrene (BaP), a ubiquitous PAH, induced a differential dose- and time-dependentcortisol response in rainbow trout and brown bullhead. BaP exposure also elicited a species-specific transcriptional response at all levelsof the HPI axis.Similarly, the HPI axis response to a standardized emersionstressor revealed species-specific differences. In the field, exposure of different brown bullhead populations to sediment with complex PAH mixtures did not consistently affect cortisol levels and providedno evidence of genetic adaptation of the stress response. Thus, future studies are needed to bridge the gap in our understanding between the laboratory and field effects of PAHs on the stress response of fish. en_US
dc.language.iso en en_US
dc.rights.uri http://creativecommons.org/licenses/by-nd/2.5/ca/ *
dc.subject Stress en_US
dc.subject Benzo(a)pyrene en_US
dc.subject Polycyclic aromatic hydrocarbons en_US
dc.subject HPI axis en_US
dc.subject brown bullhead en_US
dc.subject rainbow trout en_US
dc.subject Cortisol en_US
dc.title Effects of environmental contaminants on the stress response of rainbow trout (Onchorhynchus mykiss) and brown bullhead (Ameiurus nebulosus) en_US
dc.type Thesis en_US
dc.degree.programme Integrative Biology en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Integrative Biology en_US


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http://creativecommons.org/licenses/by-nd/2.5/ca/ Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nd/2.5/ca/

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