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
40
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, 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
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/OnRK777K
0
专业英语四级
相关试题推荐
PASSAGETHREEWhatistheearliestcompanythatStarbuckspurchased?
Itmaybeoneoftheworld’sgreatshoppingdestinations,butLondon’sRegentStreetisfailingthefashiontest,accordingtot
Itwasnotsolongagothatparentsdroveateenagertocollegecampus,saidatearfulgoodbyeandreturnedhometowaitaweek
(l)Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurvey
(l)Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurvey
MassStrandingsofWhales1.Thetidegoesoutsuddenly,【T1】______thewhales【T1】______2.Massstrandingslinkedtoparasitesa
SummerSchoolandOnlineClassesIntheUnitedStates,【T1】______forhighschoolstudents【T2】______.But【T3】______.【T4】______
SummerSchoolandOnlineClassesIntheUnitedStates,【T1】______forhighschoolstudents【T2】______.But【T3】______.【T4】______
WhalesSufferingfromShippingScientistsareworkingtoreducethenoiselevels/experiencedbywhalesfromNorthAtlantic
随机试题
G01-30型割炬()。
骨盆狭窄时可导致
男,2岁,自幼牛乳喂养,未及时添加辅食,平素食欲不振,近半个月来腹泻呈水样便,一日4或5次。体检:体重6kg,身高75cm,头围47cm,精神萎靡,心肺听诊正常,腹部皮下脂肪消失。该患儿在治疗过程中,最多发生的问题是
活化CD4+T细胞通过哪种细胞因子受体发挥作用
根据《证券法》的规定,有下列哪些情形的,为公开发行:
甲乙双方在合同中对合同履行的期限约定不明确的,根据法律规定,应按()的办法处理。
安徽省凤阳县小岗村原党委第一书记沈浩把群众的点滴难处看在眼里、记在心上、解决到实处,用一片真心换来了与群众的水乳交融、生死相依。沈浩同志的事迹说明()。①中国共产党以人为本、执政为民②党的一切工作都是为了造福人民
微观环境
将考生文件夹下WARM文件夹中的文件ZOOM.PRG复制到考生文件夹下BUMP文件夹中。
Noreferencebook,perhapsnobookofanykindexcepttheBible,issowidelyusedas"thedictionary".Evenhousesthathavefe
最新回复
(
0
)