Stress response associated with hatchery conditions in developing chum salmon (oncorhynchus keta).

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dc.contributor.advisor Trumble, Stephen John. Sanders, Rebel L. 2012-08
dc.description.abstract To assess the impact of hatchery techniques on the stress response of Chum Salmon, developing fish were subjected to treatments of formalin, low-medium-high densities, thermal shock, and mechanical distress. Mean cortisol levels for formalin treated eggs immediately increased ~350% and remained elevated for 60 minutes until returning to control treatment levels. Mean cortisol levels differed significantly between formalin treatment and control at all density levels. Both mortality rate and mean cortisol differed significantly between low, medium, and high densities. Shock and pick, as well as transport of salmon fry, was mimicked with mechanical distress and cortisol levels did not increase until mechanical distress continued for 90 minutes whereby cortisol concentrations increased ~295% above control levels. These results should help identify stress responses during early life stages of chum salmon as well as identify potential sources of anthropogenic stress associated with hatcheries. en_US
dc.publisher en
dc.rights Baylor University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact for inquiries about permission. en_US
dc.subject Stress in chum salmon. en_US
dc.subject Cortisol as an indicator of stress. en_US
dc.title Stress response associated with hatchery conditions in developing chum salmon (oncorhynchus keta). en_US
dc.type Thesis en_US M.S. en_US
dc.rights.accessrights Worldwide access. en_US
dc.rights.accessrights Access changed 1/14/14.
dc.contributor.department Biology. en_US
dc.contributor.schools Baylor University. Dept. of Biology. en_US

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