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段落1

This is Scientific American 60-Second Science. I'm Amy Kraft. Got a minute?

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A relaxing day at the beach.

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Then suddenly the peace is shattered, by the sound of ships.

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It can sour your mood.

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Now a study in the journal Biology Letters finds that noisy ships make crabs crabby, too.

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Researchers exposed different-sized shore crabs to either ship noise or ambient harbor noise.

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The crabs that contended with the annoying ship sounds had higher metabolic rates than did their companions, an indicator of stress.

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And the larger crabs were put out the most.

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Stressed crabs burn calories faster, which can stunt their growth in fisheries.

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Stressed wild crabs with increased appetites might need to travel to expand their feeding grounds, which raises their risk of running into predators.

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The research suggests that crabs aren't the only sea-dwelling species peeved by the noise, either.

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Companies are exploring ways to design quieter ships, in the hope of offering crabs and other marine life some peace and quiet.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Amy Kraft.

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