Arctic ice loss forces polar bears to use four times as much energy to survive – study

By Dilip -

Polar bears and narwhals are using up to four times as much energy to survive because of major ice loss in the Arctic, according to scientists. Once perfectly evolved for polar life, apex predators are struggling as their habitats shrink and unique adaptations become less suited to an increasingly ice-free Arctic, researchers say.

The mammals are physiologically designed to use as little energy as possible. Polar bears are primarily “sit and wait” hunters, adapted to catching seals by breathing holes, and narwhals have evolved to dive very deep for prey without making fast movements. Now, however, they are having to work much harder to stay alive, according to a review article published in Journal of Experimental Biology….

https://www.theguardian.com/world/2021/feb/24/arctic-ice-loss-forces-polar-bears-to-use-four-times-as-much-energy-to-survive-study

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