2009职称英语考前每日一练(理工类第40期-A级)职称英语考试
文章作者 100test 发表时间 2009:04:10 02:12:58
来源 100Test.Com百考试题网
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Irish Dolphins may have a unique dialect
Irish scientists monitoring dolphins living in a river estuary iIl the southwest 0f the country believe they may have developed a unique dialect to eommulncate with each other.
The Shannon Dolphin and Wildlife Foundation(SDWF)1 has been studying a group 0f up t0 120 bottle—nose dolphins in the River Shannon2 using voealisalions collected on a computer in a cow shed3 near the River Shannon.
As part of a research prnject,student Ronan t]iekey digitiscd and analysed a total of 1,882 whis—tles from the Irish dolphins and those4 from the Welsh dolphins 0n a eolnputel*aud separated them into six fundamental whistle types anti 32 diflerent categories5.of the categories.11e touud most6 were used hv both sets of dolphins7 一but eight were only heard frorn the Irish dolphins.
“We are building up a catalogue of the different whisile types they LISP and trving to associate them with behaviour like fbraging,resting,socialising and the cOmmunications of groups with calves,”project leader Simon BeITow said.“Essentially we are building up what is like a dictionary of words they use or sounds they make.”
Berrow.a mari’ne biologist.said the dolphins’(clicks are used t0 find their way around and 10一Pate prey.The whistles are Communications."They do a whole rang of other sounds like barks,groans and a kind of gunshot.”he said. “The gunshot in an intense pulse of sound. Sperm whatles use it to stun their prey.”
“When I first heard it 1 was surprised as I thought sperm whales were the only species who used it.We can speculate the dolphins are using it for the same reason as the sperm whales.”Below said.
References8 in local legend indicate there have been dolphins in the Shannon estuary for genera—tions and thev mav even have been resident there as flar hack as the 6th century9.
They are regularly seen by passengers on the Shannon ferry and an estimated 25,000 tourists every year take special sightseeing tours on local boats to visit them.
词汇:
Irish adj.爱尔兰的
socialise v.社交,