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*020  $a978-15-545-5155-2$qh.$cNkr .00
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*1001 $aStirling, Ian$_30859700
*24510$aPolar bears$bthe natural history of a threatened species$cIan Stirling
*260  $aMarkham$bFitzhenry & Whiteside$c2011
*300  $axv, 330$c24 cm
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*5208 $aNo animal is more symbolic of the Arctic than the polar bear. In the short space of 150,000 years, it has undergone behavioural and physiological changes to evolve from a grizzly bear into the most specialized predator of the Arctic sea ice. Yet, its survival is now threatened by global warming. Renowned Polar bear scientist Dr. Ian Stirling compresses 40 years of research on these iconic mammals into a new and comprehensive natural history. In accessible language, he explains their evolution, life history, behaviour, how they are researched, and the current threat to their very existence. He also explains why polar bears of Hudson Bay have become so important to our understanding of the species, and how Churchill became The Polar Bear Capital of the World. Includes the text of The international agreement on the conservation of polar bears and their habitat (signed in Oslo, Norway, in 1973).
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^