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Permanent link (DOI): https://doi.org/10.7939/R3B853Q84

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Polar bear distribution and habitat selection in western Hudson Bay Open Access

Descriptions

Other title
Subject/Keyword
habitat selection
distribution
polar bear
Resource Selection Function
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
McCall, Alysa Grace
Supervisor and department
Andrew Derocher (Biological Sciences)
Examining committee member and department
Nicholas Lunn (Environment Canada)
Scott Nielsen (Bioogical Sciences)
David Hik (Biological Sciences)
Department
Department of Biological Sciences
Specialization
Ecology
Date accepted
2013-12-03T13:49:35Z
Graduation date
2014-06
Degree
Master of Science
Degree level
Master's
Abstract
Sea ice in Hudson Bay is melting earlier and freezing later as the climate warms, resulting in declines in the condition, survival, and population size of polar bears (Ursus maritimus) in the Western Hudson Bay population. The objectives of this study are to analyze temporal variation in distribution and quantify patterns of seasonal habitat selection for polar bears on the sea ice in Hudson Bay to determine how they respond to changing sea ice conditions. Between 1990 and 2010, 137 satellite collars were deployed on 125 adult females yielding approximately 95 000 locations. Utilization distributions and a habitat selection model were developed. Distribution shifted seasonally and annually, and habitat selection was most affected by ice concentrations. Individual differences were most apparent during ice freeze-up and break-up. This research helps us understand how changes in sea ice alter polar bear habitat use and selection, important for predicting responses to future changes.
Language
English
DOI
doi:10.7939/R3B853Q84
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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