Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic
Exposure to stressors in free-living mammals can be measured via glucocorticoid hormones concentrations. Using adipose from marine mammals (blubber) as a tissue for extracting cortisol provides a means for measuring cortisol concentrations not associated with capture stress. Beluga whale range is li...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Master Thesis |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/1993/23447 |
id |
ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/23447 |
---|---|
record_format |
openpolar |
spelling |
ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/23447 2023-06-18T03:39:09+02:00 Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic Trana, Marci Renée Roth, James D.(Biological Sciences) Ferguson, Steven H.(Biological Sciences) Anderson, W. Gary (Biological Sciences) Tomy, Gregg T. (Department of Chemistry) 2014-04-11 application/pdf http://hdl.handle.net/1993/23447 eng eng http://hdl.handle.net/1993/23447 open access Cortisol Beluga master thesis 2014 ftunivmanitoba 2023-06-04T17:47:36Z Exposure to stressors in free-living mammals can be measured via glucocorticoid hormones concentrations. Using adipose from marine mammals (blubber) as a tissue for extracting cortisol provides a means for measuring cortisol concentrations not associated with capture stress. Beluga whale range is limited to the Arctic where climate change is exaggerated. Our objectives were to compare cortisol concentrations among archived blubber samples with varying quality and blubber depth, compare blubber cortisol from beluga whales in a high-stress entrapment event to whales harvested during subsistence hunts, and compare blubber cortisol among beluga whale populations in relation to conservation status, diet, sex, age and year sampled. Blubber samples showing signs of deterioration had lower cortisol concentrations. The deepest blubber contained the highest concentration of cortisol compared to other depths. Blubber cortisol concentrations from entrapped whales were higher than from harvests. Blubber cortisol was higher in the threatened population when compared to healthy populations. May 2014 Master Thesis Arctic Beluga Beluga whale Beluga* Climate change MSpace at the University of Manitoba Arctic |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
topic |
Cortisol Beluga |
spellingShingle |
Cortisol Beluga Trana, Marci Renée Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic |
topic_facet |
Cortisol Beluga |
description |
Exposure to stressors in free-living mammals can be measured via glucocorticoid hormones concentrations. Using adipose from marine mammals (blubber) as a tissue for extracting cortisol provides a means for measuring cortisol concentrations not associated with capture stress. Beluga whale range is limited to the Arctic where climate change is exaggerated. Our objectives were to compare cortisol concentrations among archived blubber samples with varying quality and blubber depth, compare blubber cortisol from beluga whales in a high-stress entrapment event to whales harvested during subsistence hunts, and compare blubber cortisol among beluga whale populations in relation to conservation status, diet, sex, age and year sampled. Blubber samples showing signs of deterioration had lower cortisol concentrations. The deepest blubber contained the highest concentration of cortisol compared to other depths. Blubber cortisol concentrations from entrapped whales were higher than from harvests. Blubber cortisol was higher in the threatened population when compared to healthy populations. May 2014 |
author2 |
Roth, James D.(Biological Sciences) Ferguson, Steven H.(Biological Sciences) Anderson, W. Gary (Biological Sciences) Tomy, Gregg T. (Department of Chemistry) |
format |
Master Thesis |
author |
Trana, Marci Renée |
author_facet |
Trana, Marci Renée |
author_sort |
Trana, Marci Renée |
title |
Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic |
title_short |
Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic |
title_full |
Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic |
title_fullStr |
Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic |
title_full_unstemmed |
Variation in blubber cortisol as a measure of stress in beluga whales of the Canadian Arctic |
title_sort |
variation in blubber cortisol as a measure of stress in beluga whales of the canadian arctic |
publishDate |
2014 |
url |
http://hdl.handle.net/1993/23447 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beluga Beluga whale Beluga* Climate change |
genre_facet |
Arctic Beluga Beluga whale Beluga* Climate change |
op_relation |
http://hdl.handle.net/1993/23447 |
op_rights |
open access |
_version_ |
1769003963909144576 |