SSS 2011-03-09
时间：2019-01-08 作者：英语课 分类：Scientific American(三)月
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.
The numbers of fish and other ocean life have dropped dramatically in the past few decades. That's because of commercial overfishing, and something called bycatch.
More than 300 thousand small whales, dolphins and porpoises 1 die due to commercial fishing each year.
And more than 250 thousand endangered sea turtles are killed on longlines set for tuna, swordfish, and other fish.
So here's a charge for any inventors out there: Create new fishing gear 2 to reduce bycatch. Top prize? Thirty thousand dollars.
It's the fifth International Smart Gear Competition sponsored by the World Wildlife Fund.
"The Eliminator," a fishing net, was a winner in 2007, designed to reduce bycatch of cod 3 in the haddock fishery.
The Eliminator takes advantage of how fish swim. It has large openings at the bottom of the net. Because when haddock face a net, they swim up to escape and get caught. But other groundfish, like cod, swim down to try to break out. So the cod can escape through openings at the bottom.
The Eliminator is now being used in New England and in Europe.
The current competition is open from March 1 through August 31. So get your net ready, and cast your ideas.
Thanks for the minute. For Scientific American's 60-Second Science, I'm Cynthia Graber.
- A shoal of porpoises are well on the feed. 一群海豚正在吞食。 来自辞典例句
- In 1928 some porpoises were photographed working like beavers to push ashore a waterlogged mattress. 1928年有人把这些海豚象海狸那样把一床浸泡了水的褥垫推上岸时的情景拍摄了下来。 来自辞典例句
- We have to gear our lives to the new changes.我们必须使自己的生活适应新的变化。
- The teeth of the wheel gear into each other.齿轮互相啮合。