首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Mass Strandings of Whales 1. The tide goes out suddenly,【T1】______ the whales【T1】______ 2. Mass strandings linked to parasites a
Mass Strandings of Whales 1. The tide goes out suddenly,【T1】______ the whales【T1】______ 2. Mass strandings linked to parasites a
admin
2017-02-18
36
问题
Mass Strandings of Whales
1. The tide goes out suddenly,【T1】______ the whales【T1】______
2. Mass strandings linked to parasites
a. Evidence: Stranded animals infested with many parasites
b. Example: Worms found in the ears of dead whales
Whales rely heavily on their hearing to 【T2】______【T2】______
This type of infestation can be very harmful
3. Mass strandings related to toxins or poisons
Toxins【T3】______ from plants or animals 【T3】______
The whale ingests these toxins
Whether leading to stranding or not depends upon the toxin【T4】______【T4】______
4. Mass strandings caused by following their prey ashore
Example:【T5】______whales beached after following the squid ashore 【T5】______
Not true for most mass strandings
The animals’ stomach【T6】______ reveal most had not been feeding 【T6】______
5. Mass strandings linked to humans
A growing concern: loud【T7】______made by humans cause strandings 【T7】______
Noises caused by【T8】______are of particular concern【T8】______
6. Mass strandings related to group【T9】______ 【T9】______
Whales follow【T10】______ leaders ashore【T10】______
【T4】
Mass Strandings of Whales
Good afternoon everyone. Well, with some of you will go out on fieldwork it’s timely that in this afternoon’s session I’ll be sharing some ideas about the .reasons why groups of whales and dolphins sometimes swim ashore from the sea right onto the beach and, most often, die in what were known as "mass stranding". Unfortunately, this type of event is a frequent occurrence in some of the locations that you’ll be travelling to, (1) where sometimes the tide goes out suddenly, confusing the animals.
However, there are many other theories about the causes of mass strandings. The first is that the behavior is linked to parasites. It’s often found that stranded animals were infested with large numbers of parasites. For instance, a type of worm is commonly found in the ears of dead whales. (2)Since marine animals rely heavily on their hearing to navigate, this type of infestation has the potential to be very harmful. Another theory is related to toxins, or poisons. These have also been found to contribute to the death of many marine animals. (3)Many toxins, as I’m sure you’re aware, originate from plants, or animals. The whale ingests these toxins in its normal feeding behavior but (4)whether these poisons directly or indirectly lead to stranding and death, seems to depend upon the toxin involved. Alternatively, it has also been suggested that some animals stranded accidentally by following their prey ashore in the confusion of the chase. Last year, (5)David Thurston monitored pilot whales that beached after following the squid ashore. However, this idea does not seem to hold true for the majority of mass strandings (6)because examination of the animals’ stomach contents reveal that most had not been feeding as they stranded. There were also some new theories, which link strandings to humans. (7)A growing concern is that loud noises in the ocean cause strandings. (8)Noises such as these caused by military exercises are of particular concern and have been pinpointed as the cause of some strandings of late.
(9)A final theory is related to group behaviour, and suggests that sea mammals cannot distinguish between sick and healthy leaders and (10)will follow sick leaders, even to an inevitable death. This is a particularly interesting theory since the whales that are thought to be most social—the toothed whales—are the group that strand the most frequently. The theory is also supported by evidence from a dolphin stranding in 1994. Examination of the dead animals revealed that apart from the leader, all the others had been healthy at the time of their death.
Without one consistent theory however it is very hard for us to do anything about this phenomenon except to assist animals where and when we can. Stranding networks have been established around the world to aid in rescuing animals and collecting samples from those that could not be helped. I recommend John Connor’s Marine Mammals Ashore as an excellent starting point if you’re interested in finding out more about these networks, or establishing one yourself.
选项
答案
involved
解析
本题涉及导致鲸鱼搁浅的毒素类型。录音提到,是否会导致鲸鱼搁浅死亡取决于所涉及的毒素,故空格处填入involved。
转载请注明原文地址:https://kaotiyun.com/show/brJK777K
0
专业英语四级
相关试题推荐
Youcan’tbuyhappiness.However,itlooks【C1】______youcanatleastinheritit,BritishandAustralianresearcherssaid.A
Youcan’tbuyhappiness.However,itlooks【C1】______youcanatleastinheritit,BritishandAustralianresearcherssaid.A
—Whatwouldyouwishtodoifyouwereacollegestudentagain?—That’sveryhardtosay,butIwishI______whenIwasacollege
IfyouhavereallybeenstudyingEnglishforsolong,it’sabouttimeyou______abletowritelettersinEnglish.
WhenthechildsawsomethingfierceandviolentonTV,hewould______underthetableandcry.
Thelittlegirl’sattentionwassuddenlycaughtbyaragdollwhich______putonthesofa,andshestoppedcrying.
WhatisthebiggestchallengeinbirdflucontrolinIndonesia?
UsingLyricstoDevelopStudents’CriticalLiteracySonglyricscanbeusedeffectivelyin【T1】toprovidethevoicesrarelyh
ConservationistsonTuesdayappealedtocountriestourgentlyaddressnewthreatstowhales,dolphinsandothercetaceans(鲸类动物)a
A.providesB.duetoC.constructionD.servingE.ascendingF.enterpriseG.despiteH.permitsI.qualifiedJ.adjusting
随机试题
驾驶摩托车在路面窄、路况较好的"村村通"公路上行车时,应控制好车速,保持安全距离,防止发生单方或碰撞事故。
A.疝囊高位结扎术B.Bassini法修补术C.Halsted法修补术D.McVay法修补术E.Ferguson法修补术股疝最恰当的手术方式是
下列哪种情况能完全再生
符合轻微病变性肾小球肾炎的描述是
五输穴说明经气的出入,以下哪一项是错误的:五输穴分布:
下列哪种手指畸形可伴有血管瘤或脂肪瘤的发生?()。
深圳证券交易所于()正式营业。
水稻的主要病虫害不包括()。
公安机关的任务是一个多形式、多层次的系统,其中,从时间上分,包括()
凡生成SbingBuRer一个对象后,还可用【】方法或ensureCapacity()方法设定缓存大小。
最新回复
(
0
)