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High-energy, high-fat lifestyle challenges an Arctic apex predator, the polar bear
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2018
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Source: Science, 359(6375), 568-572
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Journal Title:Science
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Description:A demanding lifestyle Polar bears appear to be well adapted to the extreme conditions of their Arctic habitat. Pagano et al. , however, show that the energy balance in this harsh environment is narrower than we might expect (see the Perspective by Whiteman). They monitored the behavior and metabolic rates of nine free-ranging polar bears over 2 years. They found that high energy demands required consumption of high-fat prey, such as seals, which are easy to come by on sea ice but nearly unavailable in ice-free conditions. Thus, as sea ice becomes increasingly short-lived annually, polar bears are likely to experience increasingly stressful conditions and higher mortality rates. Science , this issue p. 568 ; see also p. 514
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Source:Science, 359(6375), 568-572
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ISSN:0036-8075;1095-9203;
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Rights Information:Other
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