?

?


詼諧的語言，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

Baby Coral Home In by Sound

How do baby coral find a new home in the open ocean? They listen—very closely—for reef sounds.

茫茫大海，小小的珊瑚蟲是怎樣找到新的歸宿的呢？用聽的，用心聽礁石之聲。

Scientists at the University of Bristol in England had already discovered in the last few years that baby fish who live among coral use sound to find the reefs. So they decided to check out the coral larvae themselves. These are tiny creatures, the size of a flea.

英國布里斯托大學(xué)的科學(xué)家們早在幾年前就發(fā)現(xiàn)和珊瑚蟲一起生活的小魚是通過聲音找到礁石的。于是，科學(xué)家們決定研究一下這些如跳蚤一般大小的珊瑚蟲又是怎樣找到礁石的。

The researchers created so-called choice chambers. When the chambers were silent, the larvae floated about, equally distributed. But when the scientists played sounds of reefs, featuring the murmurs of fish and crustaceans, the larvae swarmed toward the speakers.

研究人員發(fā)明了一種選擇箱。箱內(nèi)安靜時(shí)，珊瑚幼蟲隨處游蕩，分布均勻；不過，當(dāng)科學(xué)家們播放礁石的聲音，伴隨著魚類、甲殼類的低聲細(xì)語時(shí)，這些幼蟲就會(huì)統(tǒng)統(tǒng)涌向聲源。

What’s even more interesting: fish larvae have anatomical features for detecting sound. But coral larvae have no such features. So how are they hearing? The researchers hypothesize that the sound waves are intercepted by cilia—hairlike structures—on the larvae. The work was published in the journal Public Library of Science ONE. [Mark J. A. Vermeij et al., MoxM]

不過，更有趣的是，魚類本身就具有偵查聲音的解剖學(xué)特征，而珊瑚幼蟲卻沒有。那它們是怎么聽的呢？于是，研究人員假設(shè)，珊瑚幼蟲身上像頭發(fā)一樣的纖毛截獲了聲波。（詳情請見《公共科學(xué)圖書館·綜合》）

Here’s why this is important. Coral reefs around the world are threatened. Coral larvae could be deterred by noise from human sources. So managing noise pollution could be one more angle in the effort to save the reefs.

這樣研究結(jié)果意義重大——目前珊瑚礁處境危險(xiǎn)，人類制造的噪音很有可能會(huì)嚇到珊瑚蟲，因此，控制噪音也不失為拯救珊瑚礁的好辦法。

點(diǎn)擊進(jìn)入?yún)⑴c科學(xué)60秒>>>?

聲明：音視頻均來自互聯(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"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。

滬江網(wǎng)校夏季課程上線，足不出戶，和滬江網(wǎng)校一起天天向上，共同進(jìn)步吧！

2010年12月CET【四級(jí)暑期特訓(xùn)班】

2010年12月CET【六級(jí)暑期特訓(xùn)班】