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This is Scientific American 60 Second Science, I'm Steve Mirsky, got a minute?

Tens of millions of sharks are killed for their fins¹ each year. It's not just a tragic² abuse of the animals, It's bad business.

"They're basically swimming dollar signs, whether you're trying to kill them for their meat or their fins or you're interested in looking at them for ecotourism." That's Austin Gallagher, a doctoral student at the University of Miami. I spoke³ with him on February 26th.

"We did some calculations and the results were remarkable⁴. We determined⁵ that the average shark was worth about $200,000 over the course of its life. And when you compare it to finning⁶ that animal--a one-time extractive use--seeing it for diving is worth about 40 percent more."

Gallagher and his doctoral advisor⁷ Neil Hammerschlag published the study last year in Current Issues in Tourism.

"Since this paper came out, I got an e-mail from somebody in Bali just a weeks ago saying, `We're using your paper to stop illegal harvest of thresher sharks in Bali at a local dive community.'"

Thanks for the minute for Scientific American 60 Second Science, I'm Steve Mirsky.

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1 fins
[医]散热片；鱼鳍；飞边；鸭掌
参考例句：
The level of TNF-α positively correlated with BMI,FPG,HbA1C,TG,FINS and IRI,but not with SBP and DBP. TNF-α水平与BMI、FPG、HbA1C、TG、FINS和IRI呈显著正相关，与SBP、DBP无相关。来自互联网 Fins are a feature specific to fish. 鱼鳍是鱼类特有的特征。来自辞典例句

2 tragic
adj.悲剧的，悲剧性的，悲惨的
参考例句：
The effect of the pollution on the beaches is absolutely tragic.污染海滩后果可悲。 Charles was a man doomed to tragic issues.查理是个注定不得善终的人。

3 spoke
n.（车轮的）辐条；轮辐；破坏某人的计划；阻挠某人的行动 v.讲，谈（speak的过去式）；说；演说；从某种观点来说
参考例句：
They sourced the spoke nuts from our company.他们的轮辐螺帽是从我们公司获得的。 The spokes of a wheel are the bars that connect the outer ring to the centre.辐条是轮子上连接外圈与中心的条棒。

4 remarkable
adj.显著的，异常的，非凡的，值得注意的
参考例句：
She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。 These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。

5 determined
adj.坚定的；有决心的
参考例句：
I have determined on going to Tibet after graduation.我已决定毕业后去西藏。 He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。

6 finning
n.鱼鳍式划水（仰卧水面，两脚并拢，两手放身旁上下拍水使身体向头的方向移动）
参考例句：
Fish could be sighted finning near the surface. 我们可以看到鱼把鳍露出水面。来自《现代英汉综合大词典》 A shark was finning around the surface of the ocean. 一条鲨鱼把鳍露出海面游动。来自互联网

7 advisor
n.顾问，指导老师，劝告者
参考例句：
They employed me as an advisor.他们聘请我当顾问。 The professor is engaged as a technical advisor.这位教授被聘请为技术顾问。