母揹子覓食 全球暖化 北極熊改變行為
Polar bears spotted swimming with cubs on back

北極熊寶寶「搭便車」,趴在熊媽媽背上在北極冰冷海水中游泳,這是北極熊在全球暖化威脅下出現的行為改變,以利熊寶寶存活下去。
保育組織「自然基金會」(WWF)的研究人員,是在追蹤北極熊活動時,發現這種新出現的行為改變,認為是全球暖化造成的結果,因為全球暖化讓北極夏季浮冰減少,北極熊得游更遠的距離覓食。

The scientists say that in the face of the longer swims, travelling on the mother's back could be vital for the survival of the cubs in waters surrounding scattered ice, which is prime seal-hunting territory for the animals. Travelling on the mother's back will mean the cub's body will be in direct contact with the adult's fur and a large part of the baby will be out of the icy water thereby reducing heat loss.

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