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The Coyote Paradox - Video học tiếng Anh
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The Coyote Paradox
The Coyote Paradox
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Phụ đề (15)
0:00
I’m going to explain that we shouldn’t be trying to exterminate coyotes because
0:04
doing that actually makes more of them. Coyote packs tend to be like small families.
0:09
And in a typical pack of six or so, only the dominant female tends to produce pups. The
0:14
rest of the pack are often the equivalent of the alpha’s teenage children. They are often mature,
0:18
but still hang around and hunt with their parents. And in this family pack, the younger
0:22
females don’t have their own pups. Instead, the subordinate females go through bizarre,
0:27
“fake pregnancies” every breeding season in which they go through all the stages of pregnancy, but
0:32
they don't actually produce pups. They don’t even need to have mated to do this. And it’s odd, but
0:38
it does serve a purpose – it likely primes them to act maternally toward their new brothers and
0:42
sisters, which probably increases group cohesion. But when the dominant female dies and the pack
0:48
scatters, her daughters all go out, find mates, and start getting pregnant, for real this time.
0:53
And then they become the dominant females of their own, new packs. And get this: younger females tend
0:58
to have litters that are double the size of the older alphas. So instead of reducing the number
1:02
of coyotes, a hunter can actually increase the number of coyotes. Because fighting coyotes is
1:08
like fighting the mythological hydra – every coyote you kill gets replaced by several more.
