Bluefin tuna are perfectly streamlined and equipped with cutting-edge biological gear.They are found in all the oceans except around the North and South Poles.This kind of tuna is a modern fish,yet its relationship with humanity is ancient.Japanese fishermen and the Haida people of the Pacific Northwest have caught Pacific bluefin for more than 5,000 years.
But this relationship with humans has lately been damaged.They are today among the most over-fished species on Earth.
Captain Dennis Cameron and his crew left port in his fishing boat.They were on a different kind of fishing trip.They had come to tag and measure bluefin.While Cameron went toward deep water,Steve Wilson,a Stanford University researcher who works with the Tun a Research and Conservation Center (TRCC),checked the satellite tags he hoped to attach to bluefin that day.
After another 20 minutes,they successfully tagged a big bluefin.On his laptop the night before,Wilson had programmed the satellite tag to release in a little over nine months.The tag will rise to the ocean's surface and send information about bluefin's movements to TRCC's-base in California.
The locations of bluefin,as reported by the many satellite tags over the years,are represented on the map by small circles in different colors.Western bluefin --- represented as reddish orange circles-pack the Gulf of Mexico,their spawning (產卵) grounds.From there they spread eastward into the western Atlantic and cross over to the eastern Atlantic,reaching all the way to Portugal and Spain.Eastem bluefin --- represented as white circles---fill their Mediterranean spawning grounds,and from there spread westward,crossing over to the western Atlantic,covering the coastal waters of the United States and Canada.
But an alarming lesson lies hidden at Hopkins Marine Station.Established by Stanford University in 1892,it was the first marine lab on the west coast of the United States.It sold buildings set during the age of sardines,which ended 60 years ago due to overfishing.By the 1980s sardine populations had started to come back a little,but now they are falling again.
(1)What is the purpose of the first paragraph? DD
A.To introduce bluefin as a rare fish.
B.To highlight the role of bluefin in biology.
C.To give reasons for bluefin's decline.
D.To explain our long history with bluefin.
(2)Why did Steve Wilson and his team want to tag bluefin? BB
A.They could record the spawning process of bluefin.
B.They could keep track of bluefin's whereabouts.
C.They could know where to go deep sea fishing.
D.They could collect data of bluefin's eating habits.
(3)Which of the following places is unlikely for western bluefin to spawn? CC
A.In the middle of the Atlantic Ocean.
B.Off the coast of Spain and Portugal.
C.In the middle of Mediterranean Sea.
D.Off the coast of the Gulf of Mexico.
(4)Why does the author discuss sardines in the last paragraph? AA
A.To warn that bluefin could face a similar fate.
B.To give hope of bringing back fish populations.
C.To compare the previous outcome with the current one.
D.To explain the cause of their decline remains unknown.
【答案】D;B;C;A
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發布:2024/5/26 8:0:9組卷:2引用:1難度:0.5
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