当美洲狮遇见美洲熊后谁是王者?

2017-11-19 20:19:36 来源:大耳朵足球投注技巧 8

New technology is putting the focus on rarely witnessed aggression between two of the fiercest predators in North America. For the last few decades, populations of cougars and bears have been on the rebound. But until recently, researchers didn’t know how these formidable predators interacted.

新技术把焦点放在了北美两大最凶猛的食肉动物间的罕见的侵略行为上。在过去的几十年,美洲狮和熊的数量一直在回升。但是直到现在,研究人员还不知道这两种强大的食肉动物之间是如何相互影响的。

To improve their understanding of these potential heavyweight matches, scientists set up motion-sensitive cameras in British Columbia, where both species are increasing in number. The researchers rigged the countryside so that black bears wandering the shorelines of Vancouver Island would trigger the playing of recorded sounds of cougar growls over loudspeakers. Video cameras captured the bears’ reactions—which were not timid.

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