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
83
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】______
【T10】
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
sick
解析
本题与鲸鱼跟随哪种领头者搁浅相关。录音提到,鲸鱼无法区分生病的和健康的领头者,因而可能会跟随不健康的领头者而搁浅,故答案填入sick。
转载请注明原文地址:https://kaotiyun.com/show/inRK777K
0
专业英语四级
相关试题推荐
PASSAGETHREEWhatdoesthenewsaboutStarbucksinTheOnionimply?
PASSAGETHREEAccordingtoHytner,whocheatedpeopleinthepassage?
PASSAGETHREEWhatisthemainideaofthelastparagraphofthepassage?
Studentloansarebasedonasimpleidea:thatagraduate’sfutureflowofearningswillmorethancoverthecostsofdoingade
MassStrandingsofWhales1.Thetidegoesoutsuddenly,【T1】______thewhales【T1】______2.Massstrandingslinkedtoparasitesa
MassStrandingsofWhales1.Thetidegoesoutsuddenly,【T1】______thewhales【T1】______2.Massstrandingslinkedtoparasitesa
(l)RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryratherthansociopoliticalcriteriatoitssubject,su
SummerSchoolandOnlineClassesIntheUnitedStates,【T1】______forhighschoolstudents【T2】______.But【T3】______.【T4】______
SummerSchoolandOnlineClassesIntheUnitedStates,【T1】______forhighschoolstudents【T2】______.But【T3】______.【T4】______
随机试题
被称为“千百年来曲中巨擘”的剧作是()
A、房性早搏B、室性早搏C、房颤D、室颤E、结性早搏心电图示P波提前出现,其后有正常QRS波群,P波型态与窦性P波相似,代偿间歇不完全,心电图诊断为
苯妥英钠抗癫痫作用的主要机制是
知某理想气体的摩尔数为v,气体分子的自由度为i,k为玻耳兹曼常量,R为摩尔气体常量,当该气体从状态1(p1,V1,T1)到状态2(p2,V2,T2)的变化过程中,其内能的变化为()。
案卷不宜过厚,一般不超过()。
根据《中华人民共和国消防法》的规定,国家鼓励、支持(),推广使用()技术和设备;鼓励、支持社会力量()。
老师在布置课堂练习和家庭作业时,不妥当的是()
WhenthreeFloridaboyswerediagnosedashavingAIDS,theirbarberrefusedtocuttheirhairandtheirhousewasburneddownby
(31)到(35)题使用如下数据表。部门(部门号C(2)、部门名称C(10))职工(部门号C(2)、职工号C(4)、姓名C(8)、基本工资N(7,2))检索有职工的基本工资大于或等于“11”部门中任意一名职工工资的“部门号”,正确的语句是(
Wheredoesthisconversationtakeplace?
最新回复
(
0
)