These are the recorded voices of whales. These monstrous creatures have been trumpeting their songs, one to another, in the world's oceans since the dawn of time, while overhead, great empires and civilizations have come and gone. Now, their time of decline has come. It began a long time ago.
Four-thousand-year-old rock carvings show that the people who lived in what is now Norway were probably the first to seek out and kill whales in the sea, By around 890 AD, 3,000 years later, the practice had spread to the Basque people of France and Spain, who hunted whales from boats in the Bay of Biscay. In the centuries that followed, Whaling became an important industry in Denmark, England, Germany, the Netherlands, and, finally, in what would become America.
Whaling went into dramatic decline, beginning around 1900. Today, whales are hunted commercially only by Norway, Iceland and Japan. The world's fascination with them, however, is at an all-time high, because so few of them are left, given their tragic history.
Richard Ellis writes about whales, takes pictures of whales in the open sea, and sketches whales stranded on the beach. He says it's a 20-year obsession that began in the mid-1960s, when he designed a model of a great blue for the Museum of Natural History in New York. "As I began to do the research, I realized that nobody knew anything about whales. And I couldn't really find any pictures of what they looked like: all I could find was pictures of dead whales. And I became very excited at the prospect of doing what seemed to be original research on something that was so peculiar, which was the largest animal that has ever lived on earth."
So large, he discovered that the largest dinosaur weighed only half as much as the female blue whale. As he continued his research, he boarded scientific vessels, dove with whales in the Pacific, and even watched whales die at the hands of modem explosive-tipped harpoons. His sketches appeared in magazines and encyclopedias and at the center of what was then the beginning of a movement to save the whales.
"I was one of those people who used to stand on street comers and ask for people to sign petitions, which at that time were directed towards the Japanese and the Soviets. Because in that period of time, late 60s and early 70s, the Japanese and the Soviets were killing tens of thousands of sperm, particularly in the North Pacific. And we thought that getting the world's opinion on paper would make them say, 'Oh look, all these people don't like what we are doing. We will stop.' Well, of course, they didn't stop."
Not at first, commercial whaling peaked in the mid-1960s, with more than 60,000 whales killed each year. The International Whaling Commission, a group of member nations aimed at regulating the industry, began to make recommendations to end commercial whaling entirely. Why kill whales for soap, or fuel or paints and varnishes, even margarine, ff we had substitutes for all those products? The seemingly senseless slaughter focused the world's attention on the whale and consequently the International Whaling Commission or IWC.
"And since it's said nowhere in the constitution of the IWC that you had to he whaling nation to join, you have countries like Kenya and the Seychelles. Switzerland is a member of the IWC, a country not known for its whaling history. Countries joined because they felt that this was something that needed to be done."
By 1986, the Commission had passed a moratorium on commercial whaling. But since the organization had no enforcement powers, it could and can not impose sanctions on violators. Only a few nations, Japan, Iceland, and Norway, continue to hunt whales commer
A.The Basque people of France and Spain.
B.People in what would become Norway.
C.People from Denmark and the Netherlands.
D.People in what would become America.
第2题
C5a具有的生物学活性是
A.促CT酯酶形成
B.促C3转化酶形成
C.调理作用
D.参与膜攻击单位的形成
E.趋化作用
第3题
C5a的生物学活性是
A、参与膜攻击单位的形成
B、趋化作用
C、促C3转化酶形成
D、调理作用
E、促CT酯酶形成
第4题
以下哪一项是C5b的生物学作用
A、过敏毒素作用
B、形成MAC参与细胞溶解效应
C、趋化作用
D、促代谢作用
E、免疫调节作用
第6题
使肥大细胞脱颗粒()
抑制C3转化酶形成并促进其分解()
调理吞噬和免疫黏附()
阻止在宿主细胞表面形成膜攻击复合物()
A. 膜辅助蛋白(MCP)
B. 促衰变因子(DAF.
C. 同源限制因子(HRF.
D. C3b、C4b
E. C3a、C4a、C5a
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!