在中国发现了能发出"无声"鸣叫的青蛙

• 来源期刊: 海外英语
• 年，卷（期）: 2006,（8）
• 页码范围: 74-75
• 页数: 2页
• 语种: 中文

摘要

NOISY WATERFALLS AND CLAPS OF THUNDER CAN DROWN OUT EVEN THE MOST VOCAL FROG.BUT SOME PERSISTENT CROAKERS IN CHINA HAVE A CLEVER FIX:THEY SWITCH TO ULTRASOUND. THE FEAT,RESEARCHERS SAY,MAKES THE FROGS THE FIRST AMPHIBIANS TO BE PLACED ALONGSIDE AN EXCLUSIVE GROUP OF MAMMALS,SUCH AS WHALES AND DOLPHINS,THAT HAVE ULTRASONIC ABILITY. "IT SHOWS A NEW EXAMPLE OF INDEPENDENT EVOLUTIONARY ADAPTATION IN THE FROGS FOR LIFE IN HABITATS FILLED WITH LOUD BACKGROUND NOISE,"SAID ALBERT FENG,A PRO