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地蜈蚣尾部的钳子有什么用? – 译学馆
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地蜈蚣尾部的钳子有什么用?

What Do Earwigs Do With Those Pincers Anyway? | Deep Look

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沿着海岸线走 掀起一块石头很容易就可以找到了一只 地蜈蚣
Go down by the shoreline and, turn over a rock, and you’re likely to find this: a Maritime earwig.
不用纠结于它这个名字啦
Now don’t get stuck on their name.
地蜈蚣对你的耳朵没兴趣
Earwigs are NOT interested in your ear. Really,
他们只对躲起来吃小虫有兴趣
they just want to hide out and hunt tiny prey,
比如吃这些沙虫
like these sand hoppers.
它们和你家后院常见的欧洲地蜈蚣
They ’ re cousins to the common European
是很近的亲戚
earwig you might find in your backyard.
地蜈蚣吓人的钳子在身体的尾部
Both earwigs wield fearsome looking pincerson their rear.
但是大多数动物都把武器放在身体前部
But why keep them
地蜈蚣为什么要把武器放在尾部呢
on their backside when most animals bear their weapons up front?
因为地蜈蚣大多数时间都生活在地下
For one thing earwigs spend the majority oftheir lives underground.
所以说拽着它的大钳子
So it ’ s a lot easier to
比推着大钳子走要轻松一点
drag those massive pincers than to push them.
科学家把它们的钳子称作尾须
Scientists call the pincers’cerci.’
尾须看起来像钳子 但实际上是一种爪子
They may look like jaws, but they’re actuallymodified legs.
地蜈蚣的远亲身上也有类似的尾须
You can find them on the earwigs ’ distant relatives too —
比如蟑螂和蟋蟀的身上
like cockroaches and crickets.
雄性地蜈蚣的钳子是弯的
Male earwigs have curved pincers
雌地蜈蚣的钳子是直的
On females they’re straight.
它们用钳子去捕食 保护自己或是争斗
They use them to hunt, to defend themselves from predators and to brawl.
但两只雄地蜈蚣相遇时
When one male meets another they size eachother up.
如果时机正好 战斗就开始了
If they’re evenly matched, it’s on.
它们用自己的钳子去夹对方的腹部
Using their pincers, they go straight foreach others’ abdomens.
这种战斗很少致死
It ’ s rarely a duel to the death,
这更像是一场搏斗比赛
it ’ s more of a wrestling match.
通常体型和钳子更大的地蜈蚣会把它的对手赶走
Usually the bigger one with the bigger pincers sends his opponent running.
失败者只能逃跑去生闷气
The loser scurries off and sulks.
但是并不是体型和钳子越大就越厉害
But size isn’t everything.
看看这只家伙的钳子 非常对称
Check out this guy’s pincers, they’repretty symmetric.
但是这一只的就比较歪
But this other one’s aren’t.
看看这两半钳子是怎么绕在一起的?
See how one end curves around the other?
它们是不对称的
They’re lopsided.
旧金山州立大学的研究者们想要知道
Researchers at San Francisco State University
钳子的不对称性
wanted to know if that asymmetry might give
是否是地蜈蚣的优点
some earwigs a competitive advantage.
所以他们分组匹配了雄性地蜈蚣
So they staged matches between males to see
来观察钳子形状对它们战斗力是否有影响
if the shape of those pincers made a difference.
答案是肯定的
And it did.
当两个大小相当的地蜈蚣打架时钳子不对称的那一方通常获胜
When evenly-sized earwigs battled, those with more asymmetric pincers won more often.
获胜也意味着更大的领地 更多的食物
And winning could mean more territory, more food,
更多的撩妹机会
and more access to females.
维拉诺瓦大学的科学家想要探究拥有不对称是否需要付出代价
Scientists at Villanova University wanted to know if that asymmetry came at a cost. Now,
现今大多数动物身上 对称代表着健康
In most animals symmetry is a sign of health —
这让它们在寻找朋友时
it makes them more attractive to
更有吸引力
potential mates.
这就是为什么在自然界中很少见到不对称现象
That’s why it’s pretty rare to find asymmetryin nature.
但是地蜈蚣们却不以貌取人
But earwigs aren’t so superficial.
更厉害的不对称钳子不会影响到它们的魅力
The asymmetry that helps fight doesn ’ t make them less attractive to mates.
所以说地蜈蚣妹子也不会去嫌弃
Turns out females don ’ t care
一个“歪”钳子的雄地蜈蚣
if a guy ’ s pincers might be a little crooked.
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那么雌地蜈蚣是什么样的呢?
So what about female earwigs?
她们不会去挑事打架
They don ’ t go looking for a fight,
但是她们会用钳子保护自己的卵
but they will they will use their pincers
特别是防御那些想吃卵的雌地蜈蚣
to defend their eggs… Mostly from other hungry females.
如果你想深入了解 那就别像地蜈蚣一样躲在地下了 出来订阅我们吧
If you like Deep Look, crawl out from under that rock and SUBSCRIBE.
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See you next time.

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视频概述

讲述地蜈蚣尾部钳子的作用及尾部钳子的形状对战斗力的影响

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翻译译者

heal

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审核员 LD

视频来源

https://www.youtube.com/watch?v=HuOnqWpIL9E

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