VOA慢速英语 鲨鱼对海洋的重要性

　　Activists for sharks note that the fish are valuable in the ocean. Sharks eat injured and diseased fish. Their hunting means that other fish do not become too great in number. This protects other creatures and plants in the ocean.

　　VOICE ONE:

　　Environmental activists worry that some kinds of fish are in danger of dying out. The National Oceanic and Atmospheric Administration estimated that fishing operations kill more than one hundred million sharks every year. Sharks are harvested for meat and cartilage, liver oil and, especially, for their fins. Many of the animals die when people harvesting other kinds of fish pull in sharks by accident.

　　George Burgess leads the International Shark Attack File at the Florida Museum of Natural History of the University of Florida. He says shark attacks increased during the past century for a good reason. Hundreds of millions of people now use the world’s oceans, more than in the past.

　　Professor Burgess says the first ten years of the twenty-first century are expected to register the most attacks of any ten-year period.

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