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
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, (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
PresidentEnriquePenaNietohasencouragedMexicanstowalkmore,usestairsandexerciseonehoureverydayashelaunchedac
TheLondonMarathonisadifficultrace.______,thousandsofrunnersparticipateeveryyear.
Thesuperstarturneddowninterviewrequests,sayinghepreferredtokeepalow______.
Ofcourse,talkingaboutsomethingwhichaffectsthempersonallyis______motivatingforstudents.
Hehesitatedforamomentbeforekickingtheball,otherwisehe______agoal.
Havingacreditcardhasbecomeafashiononcampus,sothere’sanongoingdebateonwhetherusingacreditcardimprovesthest
Writeanoteofabout50-60wordsbasedonthefollowingsituation:Youareoneoftheorganizersofaseminaraboutgloba
HowmanypeoplediedintheviolentearthquakethatshookLosAngelesin1994?
A、11a.m.,nextTuesday.B、11a.m.,nextThursday.C、9a.m.,thisTuesday.D、9a.m.,thisThursday.B细节题。根据句(5)可知,女士称将在下周四
A、Goshopping.B、Tidythehouse.C、Gotochurch.D、Visitrelatives.A本题考查行为。由句(5—1)可知,女士说有人告诉她圣诞节的第二天是购物的好日子;由句(5—2)可知,男士表示赞同,并告
随机试题
氧化锆式氧传感器温度要求在_______℃的条件下才能可靠工作。
正常情况下可观察到的管型有
女性患者已确诊为绒癌,近1周咳嗽咯血,胸片于左肺上叶有一4cm×4cm阴影。可能的诊断是( )。
消费者享有根据自己的要求和意愿自主选择商品或服务的权利,其自主权包括()。
某火电厂2009年占地80万平方米,其中厂区围墙内占地40万平方米,厂区围墙外灰场占地3万平方米,生活区及其他商业配套设施占地37万平方米。已知,该火电厂所在地适用的城镇土地使用税每万平方米年税额为1.5万元。根据城镇土地使用税法律制度的规定,该火电厂20
简述侵害人身(生命、身体、健康)权的损害赔偿范围。
结合材料回答问题:材料1民族主义,并非是遇着不同族的人便要排斥他,是不许那不同族的人来夺我民族的政权……民族革命的原故,是不甘心满洲人灭我的国,主我的政,定要扑灭他的政府,光复我民族的国家……我们并不是恨满洲人,是恨害汉人的满洲人……民
数据库系统的主要特点为数据集成性、数据的高______和低冗余性、数据独立性和数据统一管理和控制。
以下叙述错误的是()。
Youwillheartwotelephoneconversations.Writedownonewordornumberineachofthenumberedspacesontheformsbelow.
最新回复
(
0
)