科学美国人60秒:喜欢搭便车的鱼
日期:2020-12-11 11:55

(单词翻译:单击)

NJ,z[Ll&0v%EEMk^X.hC@H00

听力文本

l0h9^7qRb,L5M;99

This is Scientific American's 60-second Science, I'm Christopher Intagliata.
The remora is an unusual fish. It hitchhikes on other sea creatures using a sucker on its head.
"So you can see them on whales, dolphins, sharks, turtles. They stick to scuba divers. They stick to boats, to other fishes, other remoras."
Brooke Flammang is a comparative biomechanist at the New Jersey Institute of Technology and Rutgers University. She says sticking to other animals is a pretty good strategy.
"They avoid predation by sticking to large animals—no one's going to attack you if you're on a shark. It's a food source—many of them pick parasites off of the host they're attached to and eat bits of food that are flying by and poop. And they also have the ability to potentially meet other remoras for mating on the same organism."
But now her team has discovered that the fish have another unusual quality: they're sensitive to touch—a type of touch previously unknown in the fish world.
"Up until now we didn't think fish had the ability to sense touch in this way—or to sense dragging and shear, which is going to be very important for a remora, which is attached to something moving very quickly."

+50e)*d7q|

搭便车的鱼.jpg
By dissecting the fishes' suckers and looking at the tissue with electron microscopes and CT scans, they saw an unusual push-button-like structure, which they determined must be a type of mechanoreceptor, enabling a sense of touch.
"And so we just started poring through the literature, trying to figure out what we were even looking at, and the only thing that has the same structure, a push-rod mechanoreceptor, are monotremes: platypus and echidnas."
The details are in the journal Royal Society Open Science.
The study suggests that this sort of touch perception arose independently at least twice in the animal kingdom: in remoras and monotremes. And big picture?
"I think the real story here is that we just need to look for different sensory capacities in organisms to a much larger extent. And that they are maybe mechanical receptors in all kinds of organism that we still have not found yet."
Because there are a lot of ways that life-forms have come up with to make a living.
Thanks for listening for Scientific American's 60-second Science. I'm Christopher Intagliata.

A6iVeA%.HbRT0iXW

&%lZ)u+Yi7^I

参考译文

z,9STm0DmR

这里是科学美国人——60秒科学系列,我是克里斯托弗·因塔格里塔+@bo&f_VVbHlG7
印鱼是一种不寻常的鱼!3tC#!#AeF-*。因为它会用头上的吸盘,搭乘其他海洋生物的“便车”d9g8[rvXHoyiA|D|3U
“你可以在鲸鱼、海豚、鲨鱼、海龟身上看到它们54g(%1o.Fi*lw=BE&#。它们会附着在潜水员身上Kqe,IO-3L;Xq3~H[LHe。还会附着在船上、其它鱼类和同类身上4xyo%uZpgJf~)uZy。”
新泽西理工学院和罗格斯大学的比较生物力学家布鲁克·弗拉芒说到UAKSe]U-yLG=~9,eGm.[。她说附着在其它动物身上是非常好的策略o8LD(B(N)*
“它们通过附着在大型动物身上来避免被捕食,如果你吸附在鲨鱼身上,那没有动物会攻击你qy|EpRzXi=S.5。这还能使它们获得食物来源,许多印鱼会取出宿主身上的寄生虫,吃掉在宿主周围游动的食物,然后排泄dK-cB|BJI=x.#2(Qp。它们也有可能遇到同类,在同一生物上交配5lSt_88b4Za。”
但现在,她的团队发现印鱼还有另一种不寻常的特性:它们对触觉很敏感,而人类此前从并不知道鱼类中存在这种触觉xoSrBan_T&*
“直到现在我们才知道鱼类有这种感知接触,或感知拖拽和剪切的能力,对贴附在快速移动物体上的印鱼来说,这会非常重要^R9Uny)sTH。”
通过仔细分析印鱼的吸盘并用电子显微镜和CT扫描仪观察这一组织,他们看到了不同寻常的按钮状结构,他们确定这肯定是一种能产生触感的机械性刺激感受器MP@YTI)!|dAnPKLIk
“因此,我们开始研究文献,试图弄清楚我们观察到的到底是什么,而同样具有推杆状机械性刺激感受器结构的,是两种单孔上目动物:鸭嘴兽和针鼹vrj3A+q(@SIqub。”
研究详情刊登在《英国皇家学会学报·开放科学》期刊上d)QWYxS_*=IxG7S-C.dF
这项研究表明,这种触觉感知在动物界至少独立产生过两次:在印鱼和单孔上虞动物身上8^o[E*h(,e3(%Y。那接下来怎么做?
“我认为我们只需要在更大范围寻找生物的不同感受能力hwF5s4C)ab#Mb;8L。可能所有生命体都有机械性感受器,而我们尚未发现_[=wXdlWrn。”
因为生命形式想出了多种多样的谋生手段b2dtyTy~W]Q*3zzd
谢谢大家收听科学美国人——60秒科学GYCzOy^sL85+uO。我是克里斯托弗·因塔利亚塔w!y^A&MdYi

-qYd4Au)lPPa1I)i

译文为可可英语翻译,未经授权请勿转载!

U~SaZ~#y4__pJHk[

x+W!#;xy9x;;

重点讲解

MRwk@b2LK5EDu51O

m3(.#R;h76O44jQVQ]D!

重点讲解:
1. be sensitive to 敏感的;
Some of us are sensitive to smells, others find colours easier to remember.
我们当中的一些人对气味很敏感,而其他一些人则更容易记住颜色~Rz+5|SHvn
2. pore through 仔细阅读;认真钻研;
It will take several more months to pore through the volumes of documents.
详细研究这大堆的文献还要多花好几个月的时间hPHoTATnF76-]G!EUFWV
3. all kinds of 各种类型的;五花八门的;
They sell all kinds of things.
他们出售各种各样的东西ubfz8(|Cb_T~
4. make a living 谋生;
If I can't make a living at painting, at least I can teach someone else to paint.
如果我不能靠画画谋生,至少我可以教别人画画,A)SYvZ#qRq8b1

5s|J^rN&=H0,v0!47,0

*V(i&5R+_Ow5G7%=Ncf*#[DUulMKLRXe%_2N#Ene~[
分享到