詼諧的語(yǔ)言，生動(dòng)的內(nèi)容一分鐘快速掌握科技最新動(dòng)態(tài)?

本期節(jié)目音頻下載

Creatures that live in the dark may lose their sight over evolutionary time. They may even lose their eyes entirely. Now it appears that they also lose sleep. Because a new study shows that cave-dwelling fish spend more time awake than their counterparts at the sunny surface. The finding is in the journal Current Biology.

在黑暗中生活的動(dòng)物可能會(huì)在進(jìn)化過(guò)程中失去視力，甚至可能一點(diǎn)東西都看不見(jiàn)。但現(xiàn)在發(fā)現(xiàn)，它們有可能連睡眠都失去了，因?yàn)橐豁?xiàng)新研究發(fā)現(xiàn)，和住在光照充足的淺層同伴相比，住在穴居魚(yú)會(huì)更常保持清醒。這項(xiàng)發(fā)現(xiàn)刊登在《當(dāng)代生物學(xué)》雜志上。

Researchers studied three populations of Mexican tetra in the lab. Fish that live in creeks or rivers have two eyes and see just fine. But those that have adapted to living in caves lack eyes. What they do have is insomnia. The scientists observed that the tetras that normally spend time in the light do sleep soundly at night, resting on the bottom of their tanks. The cave fish, on the other hand, remain on high alert, patrolling their habitats even after hours.

研究人員在實(shí)驗(yàn)室研究了三種墨西哥麗脂鯉種群。在溪里或河里生活的魚(yú)有兩只眼睛，視力良好。但穴居魚(yú)則沒(méi)有眼睛，而且患有失眠癥?？茖W(xué)家觀察發(fā)現(xiàn)，接觸陽(yáng)光時(shí)長(zhǎng)正常的魚(yú)類(lèi)在晚上會(huì)在魚(yú)缸底部睡得很安穩(wěn)。而另一方面，穴居魚(yú)仍然保持高度警惕，三更半夜還在居住的地方游來(lái)游去。

The researchers are working to identify the genes responsible for this fishy restlessness. Not that they’ll reveal how you can get by on minimal shut-eye. Because the cave fish may not need less sleep—they may need to stay awake to forage more in an environment where food can be scarce and appear unpredictably. And even a blind fish can see: you snooze, you lose.

研究人員旨在鑒別使魚(yú)類(lèi)失眠的基因，而并不是說(shuō)想展示如何在最小睡眠的狀態(tài)下活下去。因?yàn)檠ň郁~(yú)可能并不需要睡得更少——它們可能需要保持清醒，以便更經(jīng)常地在食物短缺和食物不常出現(xiàn)的環(huán)境中覓食。一條瞎眼魚(yú)都可以預(yù)見(jiàn)到：打個(gè)盹，你就虧了。

點(diǎn)擊進(jìn)入?yún)⑴c科學(xué)60秒查看背景資料和單詞總結(jié)>>>

聲明：音視頻均來(lái)自互聯(lián)網(wǎng)鏈接，僅供學(xué)習(xí)使用。本網(wǎng)站自身不存儲(chǔ)、控制、修改被鏈接的內(nèi)容。"滬江英語(yǔ)"高度重視知識(shí)產(chǎn)權(quán)保護(hù)。當(dāng)如發(fā)現(xiàn)本網(wǎng)站發(fā)布的信息包含有侵犯其著作權(quán)的鏈接內(nèi)容時(shí)，請(qǐng)聯(lián)系我們，我們將依法采取措施移除相關(guān)內(nèi)容或屏蔽相關(guān)鏈接。