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 paras
Mass Strandings of Whales 1. The tide goes out suddenly,【T1】______ the whales【T1】______ 2. Mass strandings linked to paras
admin
2019-04-29
47
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】______
【T8】
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, 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. 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. 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 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, 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 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. A growing concern is that loud noises in the ocean cause strandings. Noises such as these caused by military exercises are of particular concern and have been pinpointed as the cause of some strandings of late.
A final theory is related to group behaviour, and suggests that sea mammals cannot distinguish between sick and healthy leaders and 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
military exercises
解析
本题与“人们尤其关注由……制造的噪音”相关。空格前的by提示空格处应填入名词或名词短语。录音提到,由军事演习制造的噪音是人们尤其关注的,故答案填入military exercises。
转载请注明原文地址:https://kaotiyun.com/show/4nRK777K
0
专业英语四级
相关试题推荐
PASSAGETWO
Ifyouthinkmoneycan’tbuyyoufriends,thinkagain,intheonlineworld,it’spossibletopurchaseacrowdoffans.Onethous
PASSAGEONE
Itmaybeoneoftheworld’sgreatshoppingdestinations,butLondon’sRegentStreetisfailingthefashiontest,accordingtot
Theschoolcommitteehopedthattheirchoiceofplaywouldbe_____withthestudentsandtheirparents.
MassStrandingsofWhales1.Thetidegoesoutsuddenly,【T1】______thewhales【T1】______2.Massstrandingslinkedtoparasitesa
A.interactionB.experiencedC.reflectD.responseE.undertakenF.affectG.althoughH.frustrationI.subjectJ.sufficient
A.interactionB.experiencedC.reflectD.responseE.undertakenF.affectG.althoughH.frustrationI.subjectJ.sufficient
But______withplayers,executives,andyoungpeople,I’velearnedthatthosewhorisetotheheightsinanyfieldaren’tneces
随机试题
从节能观点出发,适宜回流比R应取()倍最小回流比Rmin。
论述走农村包围城市、武装夺取政权道路理论的意义。
患者,女性,35岁。确诊原发性肺动脉高压2年,门诊治疗,关于其治疗不包括
女性,40岁。先天性主动脉瓣狭窄,PDE示中度狭窄。该患者不可能出现的体征是
塑料—钢复合材料,主要是由()塑料膜与低碳钢板复合而成。
人工处理地基的方法主要有()。
乙单位是实行国库集中支付的事业单位,经批准,乙单位的工资支出和设备购置实行财政直接支付,日常办公及零星支出实行财政授权支付。审计机构对该单位财政资金使用进行检查,发现:(1)4月,该单位通过零余额账户向上级单位基本账户划转资金15万元,用于为上级单位员工
越来越多的人成了互联网追新潮的盲从者,他们生怕自己惯用的虚拟身份在某个网络社区被别人抢先占据。这种场面似乎与1999年前后免费电子邮箱热潮有些相似,当时的统计显示,每个互联网用户平均注册了8.6个电子邮箱。可到2005年,这些邮箱只有18%还在使用,每个互
根据《侵权责任法》的有关规定,构筑物发生脱落、坠落造成他人损害,所有人、管理人或者使用人承担责任的归责原则是()。
已知Value是一个类,value是Value的一个对象。下列以非成员函数形式重载的运算符函数原型中,正确的是()。
最新回复
(
0
)