The Ecology Of The Polar Bear Ursus Maritimus Along The Western Coast Of Hudson Bay
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The Ecology Of The Polar Bear Ursus Maritimus Along The Western Coast Of Hudson Bay
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Author : Ian Stirling
language : en
Publisher: Fisheries and Environment Canada : [available from] Minister of Supply and Services
Release Date : 1977
The Ecology Of The Polar Bear Ursus Maritimus Along The Western Coast Of Hudson Bay written by Ian Stirling and has been published by Fisheries and Environment Canada : [available from] Minister of Supply and Services this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Animal ecology categories.
The Ecology Of The Polar Bear Ursus Maritimus Along The Western Coast Of Budson Bay
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Author :
language : en
Publisher:
Release Date : 1977
The Ecology Of The Polar Bear Ursus Maritimus Along The Western Coast Of Budson Bay written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
Polar Bear Ursus Maritimus Foraging Ecology In Western Hudson Bay
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Author : Luana Sciullo
language : en
Publisher:
Release Date : 2017
Polar Bear Ursus Maritimus Foraging Ecology In Western Hudson Bay written by Luana Sciullo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
The ecological response of climate change is expected to be especially pronounced across the circumpolar Arctic. Predicted declines in sea ice extent and seasonal duration are expected to affect the foraging ecology of marine species, particularly polar bears (Ursus maritimus) that rely on stable sea ice patterns for various aspects of their life history. The goal of this thesis was to quantify body condition and characterize diet composition of polar bears in western Hudson Bay over a broad temporal scale (2004-2014), and identify potential environmental factors that may influence dietary shifts in one of the southernmost subpopulations of this species. Body condition was higher in adult and subadult females than males, consistent with energetic demands of gestation and lactation. Body condition also declined over time in adult and subadult males and females and was influenced by sea ice breakup and freeze-up dates. These trends suggest that the historical climate-driven declines in polar bear body condition documented in western Hudson Bay have continued. Variation in diet composition and dietary niche breadth across age, sex and reproductive groups suggest foraging behaviour is structured by energetic demands, intraspecific competition and sexual body-size dimorphism. Specifically, variation in diet and niche breadth across females was influenced by age (experience), energetic state and avoidance behaviours. Variation in diet composition and niche breadth between male and female bears, however, was more likely structured by body size, whereby capture of larger prey types and a broader range of prey species occurred with increasing body size. Body condition was positively related to niche breadth in adult males but negatively related to niche breadth in females with dependents, suggesting that less-selective foraging (scavenging) does not benefit body condition among reproductive females. Inter-annual fluctuations in diet composition reflected shifts in local prey availability during the study period, and sea ice breakup date influenced the diets of subadults and family groups, suggesting an increased sensitivity to sea ice conditions. Therefore, inter-annual variability in diet and declines in polar bear body condition likely reflect contemporaneous changes in sea ice availability and population demography, and have implications for the long-term conservation of this subpopulation.
Polar Bears On The Hudson Bay
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Author : Dan Leathers
language : en
Publisher: Mitchell Lane Publishers, Inc.
Release Date : 2008-03
Polar Bears On The Hudson Bay written by Dan Leathers and has been published by Mitchell Lane Publishers, Inc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-03 with Juvenile Nonfiction categories.
Polar bears are amazing creatures for many reasons. Their white coats and expressive faces make them a favorite of both children and adults. Ingenious hunters, they are the world’s largest land predator. They will also swim hundreds of miles to reach their favorite hunting grounds. The bears do all of this in one of the most difficult environments in the world: the Arctic. Unfortunately, the bears’ life may be getting even harder because of humans. Find out what is happening to the polar bears of the Hudson Bay, and what you can do to help.
The Ecology Of The Polar Bear Ursus Maritimus Along The Western Coast Of Hudson Bay
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Author : Ian Stirling
language : en
Publisher: Fisheries and Environment Canada : [available from] Minister of Supply and Services
Release Date : 1977
The Ecology Of The Polar Bear Ursus Maritimus Along The Western Coast Of Hudson Bay written by Ian Stirling and has been published by Fisheries and Environment Canada : [available from] Minister of Supply and Services this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Animal ecology categories.
A Little Less Arctic
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Author : Steven H. Ferguson
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-05-30
A Little Less Arctic written by Steven H. Ferguson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-05-30 with Science categories.
In Arctic Canada, Hudson Bay is a site of great exploration history, aboriginal culture, and a vast marine wilderness supporting large populations of marine mammals and birds. These include some of the most iconic Arctic animals like beluga, narwhal, bowhead whales, and polar bears. Due to the challenges of conducting field research in this region, some of the mysteries of where these animals move, and how they are able to survive in such seemingly inhospitable, ice-choked habitats are just now being unlocked. For example, are polar bears being replaced by killer whales? This new information could not be more salient, as the Hudson Bay Region is undergoing rapid environmental change due to global warming, as well as increased pressures from industrial development interests. A Little Less Arctic brings together some of the world’s leading Arctic scientists to present the current state of knowledge on the physical and biological characteristics of Hudson Bay.
Polar Bears
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Author : IUCN/SSC Polar Bear Specialist Group. Working Meeting Oslo, Norway)
language : en
Publisher: IUCN
Release Date : 1998
Polar Bears written by IUCN/SSC Polar Bear Specialist Group. Working Meeting Oslo, Norway) and has been published by IUCN this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Polar bear categories.
Polar Bears
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Author : IUCN/SSC Polar Bear Specialist Group. Working Meeting
language : en
Publisher: IUCN
Release Date : 2006
Polar Bears written by IUCN/SSC Polar Bear Specialist Group. Working Meeting and has been published by IUCN this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Nature categories.
These proceedings provide an overview of the ongoing research and management activities on polar bears in the circumpolar arctic. Together with the previous 13 proceedings, they provide an historic record of international efforts in protecting, studying and managing polar bears. With recent documentation of how warmer arctic climate might affect the sea ice habitat of polar bears, the predictions of even warmer climate in the next decades, and documentation of effects on polar bears subpopulations, an evaluation of the red list status of polar bear subpopulations was followed by an increased conservation designation of vulnerable. In the complexity of possible interactions between climate change, local harvest, and in some areas high levels of pollutants, an increased level of international cooperation was advocated.
Polar Bears
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Author : Ian Stirling
language : en
Publisher: Ann Arbor : University of Michigan Press
Release Date : 1998
Polar Bears written by Ian Stirling and has been published by Ann Arbor : University of Michigan Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Nature categories.
A treasury of information and outstanding photographs brought together to reveal the fascinating life of the symbol of Arctic survival, the polar bear
Polar Bears
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Author : Andrew E. Derocher
language : en
Publisher: JHU Press
Release Date : 2012-03-08
Polar Bears written by Andrew E. Derocher and has been published by JHU Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03-08 with Science categories.
Presents an introduction to the polar bear, discussing its evolution, physical characteristics, life cycle, predatory behavior, habitat, and the threats to its existence from global warming.