首页
登录
职称英语
[originaltext] The face of an ocean sunfish certainly leaves an impression.
[originaltext] The face of an ocean sunfish certainly leaves an impression.
游客
2023-08-04
63
管理
问题
The face of an ocean sunfish certainly leaves an impression. So too does its size. They are the largest bony fish in the world, ranging from one to four meters across, and weighing up to a ton.
And their name? They are called sunfish because they spend almost half their day basking motionlessly at the ocean’s surface, seemingly catching some rays.
But until now it was not understood why they sunbathed.
New research shows that they hunt for marine hydrozoans, which are small groups of predatory animals related to jellyfish. The fish take siphonophores, a type of hydrozoan, most frequently at depths of between 50 meters and 200 meters. After their hunt they go back to the surface to top up their body temperatures by basking in the sun.
It’s the first evidence that sunfish graze on these creatures in deep water. It was also previously believed they only ate jellyfish.
A team of the University of Tokyo, Japan, caught several sunfish off the country’s coast and attached thermometers to measure changes in their body temperatures.
They also attached cameras with lights on them, to gain insight into exactly what the fish were hunting. After four to six days these instruments naturally separated from the sunfish, allowing the researchers to collect and analyze the data.
The research, published in the journal Animal Ecology, uncovered that ocean sunfish swam back and forth between the surface and deep water during the day. Their cycles of diving deep and then warming at the surface helped to maximize their hunting time. Each time they "sunbathed, " it regulated their body temperature.
The team was also surprised to find just how quick the warming process was. " Beyond our assumption, their body temperature increased rapidly during surface warming, suggesting they have some physiological mechanisms to increase heat gain from the surrounding water. "
This explains why larger sunfish can hunt for longer.
It also provides a possible answer to why they have such a large body—as it serves to help them adapt to their hunting environment, losing heat very slowly.
The sea giants only hunt during the day. At night, they stayed at shallower depths of about 20 meters.
The discovery is a reminder that the deep sea is " still a frontier" and only by increasingly observing the ocean depths will we unlock its secrets.
Questions 16 to 18 are based on the recording you have just heard.
16. What can we learn about the ocean sunfish?
17. Why do sunfish sunbathe?
18. What is the function of sunfish’s large body?
选项
A、They are the largest animal in the ocean.
B、They are the heaviest animal in the world.
C、They are the largest bony fish in the world.
D、They are the fastest fish in the ocean.
答案
C
解析
原文中提到,翻车鱼的面孔让人印象深刻,其体型也不遑多让。翻车鱼是世界上最大的硬骨鱼,长度为1米到4米不等,体重高达1吨。因此答案为C。
转载请注明原文地址:https://tihaiku.com/zcyy/2897081.html
相关试题推荐
[originaltext]W:Ican’tbelievemyeyes,Bill.Areyouhavingasaladforlunc
[originaltext]W:Ican’tbelievemyeyes,Bill.Areyouhavingasaladforlunc
[originaltext]W:Ican’tbelievemyeyes,Bill.Areyouhavingasaladforlunc
[originaltext]W:Ican’tbelievemyeyes,Bill.Areyouhavingasaladforlunc
[originaltext]W:Ican’tbelievemyeyes,Bill.Areyouhavingasaladforlunc
[originaltext]M:YouknowIwillbethemaintalkerintheclassroomdiscussion
[originaltext]M:YouknowIwillbethemaintalkerintheclassroomdiscussion
[originaltext]M:Mrs.Hudson,newresearchshowsthatevenjustfiveminutesof
[originaltext]M:Mrs.Hudson,newresearchshowsthatevenjustfiveminutesof
[originaltext]IndependenceDayisthenationalholidayoftheUnitedStates
随机试题
[originaltext]ProfessorsfromYaleUniversityagreedinapaneldiscussion
色彩的象征性多因地域、民族、宗教、文化、风俗而异。在我国古代,红、黄、蓝、白、黑
大型复杂项目,一般具有周期较长规模较大、目标构成复杂等特征,因此大型复杂项目的控
关于尿沉渣分析仪评价的叙述,错误的是()。A.尿沉渣分析仪应用了流式细胞和电阻
镇区居住用地规划布局应做到()。A.选址应符合小城镇用地布局的要求,有利于
A.a1=(1,1,1,0)T,a2=(-1,-1,1,0)T B.a
质量具有的特点有( )。A.经济性 B.绝对性 C.广义性 D.长期性
行领导在网络安全会议上做出重要讲话,讲话稿打印出来后发现有两处模糊了,填入模糊处
河西村在第二轮承包过程中将本村耕地全部发包,但仍留有部分荒山,此时本村集体经济组
项目施工过程中,发生以下情况之一时,施工组织设计应及时进行修改或补充,错的是()
最新回复
(
0
)