綠海龜是怎樣在漫無(wú)邊際的海洋中航行、找到阿森松島的沙灘并在那里搭窩的？科學(xué)家們對(duì)它們的這一習(xí)性有了新的見(jiàn)解。

文字稿

Every year between December and June, thousands of green sea turtles migrate. They go to Ascension Island to nest - females crawling ashore to lay their eggs in the sand. Because of the remote location and cost of research though, scientists still do not understand exactly how they get there.

每年12月到次年6月，成千上萬(wàn)只綠海龜遷徙。它們游到阿森松島搭窩：雌龜爬上岸，在沙灘上挖坑產(chǎn)卵。然而，由于地點(diǎn)偏遠(yuǎn)和研究成本高昂，科學(xué)家們?nèi)圆磺宄鼈兪侨绾蔚竭_(dá)那里的。

Now they've developed a model which simulates part of that arduous journey. What the scientists found is that the species uses a range of weak cues rather than a few strong ones, which could lead them off course. It makes sense - as relying on a single navigating cue, such as an inbuilt compass, could render them sensitive to change.

現(xiàn)在，他們研發(fā)出了一個(gè)模型來(lái)模擬綠海龜?shù)哪嵌纹D辛征程?？茖W(xué)家們發(fā)現(xiàn)，該物種使用一系列微弱的線索來(lái)辨別方向，而不是靠可能引導(dǎo)它們偏離航線的大線索。這是有道理的，因?yàn)橐揽繂我坏木€索來(lái)定向，比如其體內(nèi)的生物羅盤(pán)，可能使它們對(duì)變化十分敏感。

The scientists say that understanding how fish, animals and birds navigate could help them figure out how to protect those that are endangered, as well as what factors might affect their behaviour.

科學(xué)家們說(shuō)，了解魚(yú)、獸和鳥(niǎo)類的定向方式可以幫助他們弄清楚如何保護(hù)瀕危動(dòng)物以及哪些因素可能影響這些動(dòng)物的行為。

1. 詞匯

migrate （動(dòng)物）遷徙
crawling 緩慢地爬行
remote 偏遠(yuǎn)的，遙遠(yuǎn)的
simulates 模擬
arduous 艱辛的，艱巨的
weak cues 弱線索
off course 偏離方向
navigating 用來(lái)確定、辨別方向的
render 使變得
figure out 理解，弄清楚

2. 閱讀理解：請(qǐng)?jiān)谧x完上文后，回答下列問(wèn)題 。

1. True or false? If turtles followed less frequent, stronger cues, they are more likely to lose direction.

2. Where do the female turtles lay their eggs?

3. Why has research into the green sea turtles been difficult to do in the past?

4. What might be the benefit of this research about turtles?

3. 答案

1. True or false? If turtles followed less frequent, stronger cues, they are more likely to lose direction
True. Scientists found that the species uses a range of weak cues rather than a few strong ones, which could lead them off course (or get lost).

2. Where do the female turtles lay their eggs?
They lay their eggs on the land, buried in the sand.

3. Why has research into the green sea turtles been difficult to do in the past?
Because of the Ascension Island’s remote location and cost of research, scientists have not been able to understand exactly how they get there.

4. What might be the benefit of this research about turtles?
The scientists say that understanding how fish, animals and birds navigate could help them work out how to protect those that are endangered – such as the green sea turtles.