手机APP下载

您现在的位置: 首页 > 在线广播 > 科学美国人 > 科学美国人科学系列 > 正文

科学美国人60秒:狼比狗更具合作精神

来源:可可英语 编辑:aimee   可可英语APP下载 |  可可官方微信:ikekenet
  


扫描二维码可进行跟读训练
  下载MP3到电脑  [F8键暂停/播放]   批量下载MP3到手机
EU~l&-%d40A)v7y&v;w

~!hx1gpm=|OrGkrHd6(m

This is Scientific American's 60-second Science, I'm Karen Hopkin.
This will just take a minute.
If you need help herding some sheep or retrieving a stick, you can count on your canine companion. Because dogs always seem to be keen on lending a paw. But only if their partner is a person. When it comes to cooperating with one another, dogs are truly lost...and instead it's wolves who've mastered the art of teamwork. That's according to a study in the Proceedings of the National Academy of Sciences.
For thousands of years, humans have been breeding dogs that can do all sorts of neat tricks. And because pups aim to please, we've come to think that domestication has somehow boosted dogs' powers of cooperation. But researchers in Austria have been wondering whether that notion could be barking up the wrong tree. Because left to their own devices, dogs are bigger loners than wolves.
"So wolves live in closely knit family packs, they cooperate in raising the young, they also cooperate in hunting and in defending their territories. So they really have a strong dependence on cooperation in many aspects of their lives. In contrast, to this free ranging dogs actually forage mostly by themselves solitarily. It's only mothers that raise their young. And they do form packs but they tend to be somewhat more fluid, if you want."

T4UJ#n@f-Z=W;

狼.jpg
That's Sarah Marshall-Pescini of the Wolf Science Center at the University of Vienna. She and her colleagues decided to test dogs' and wolves' relative powers of cooperation. In the setup, a pair of animals...either two dogs or two wolves...is presented with a contraption that will allow the participants to access a tray of food...but only if both members of the team simultaneously pull on the two ends of a rope.
A dozen wolves and 14 dogs took the challenge. And the results? The wolves ran circles around their doggie descendants. In some 400 attempts, the wolf teams scored a snack 100 times. Which may not sound all that impressive...until you compare it with the doggie duos, who, in nearly 500 trials, succeeded only twice.
Now, it's not that dogs are less avid learners. Or that they turned tail and avoided the apparatus. Marshall-Pescini says the pooches were curious about the device.
"What seemed to be happening was they didn't want to get into conflict with each other. So they wouldn't both go and try things on it but rather took it in turns. And this really hindered their capacity to cooperate."
So rather than step on each others' toes, the hounds took turns bowing out, giving their teammate a chance at the plate. That show of social grace left the poor pups with their tummies growling. And no treat to wolf down.
For Scientific American — 60-Second Science. I'm Karen Hopkin.

XeT10POBb(@T3

Ioghr[~beIr0om^mQIA

.2+Yr9m%~s[~NjwRJK-d272%Z5Tnsayxcjcg_AJ@=k

重点单词   查看全部解释    
device [di'vais]

想一想再看

n. 装置,设计,策略,设备

 
tend [tend]

想一想再看

v. 趋向,易于,照料,护理

 
challenge ['tʃælindʒ]

想一想再看

n. 挑战
v. 向 ... 挑战

 
impressive [im'presiv]

想一想再看

adj. 给人深刻印象的

联想记忆
curious ['kjuəriəs]

想一想再看

adj. 好奇的,奇特的

联想记忆
keen [ki:n]

想一想再看

adj. 锋利的,敏锐的,强烈的,精明的,热衷的 <

 
stick [stik]

想一想再看

n. 枝,杆,手杖
vt. 插于,刺入,竖起<

 
apparatus [.æpə'reitəs]

想一想再看

n. 装置,器具,器官,机构,组织

联想记忆
gracefully

想一想再看

adv. 优雅地;温文地

 
partner ['pɑ:tnə]

想一想再看

n. 搭档,伙伴,合伙人
v. 同 ... 合

联想记忆

发布评论我来说2句

    最新文章

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。