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

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Humanity has a long history of working together to hunt large prey.

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As evidence, see the extinction rates of large animals after people first arrive in a new locale.

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Now scientists have a clearer view of our predatory role, across a number of terrestrial and marine ecosystems.

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And the picture is not a pretty one, we have some bad hunting habits.

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Researchers surveyed 2,125 species of predators on land and in the water.

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And they compared the behavior of non-human predators to humans in those ecosystems.

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Perhaps not surprisingly, humans prey on important large carnivores at a dramatically higher rate than other predators do.

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The biggest difference, however, comes in which members of the population we cull.

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Typical predators might kill the young or the infirm.

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Humans, both on land and particularly in the water, claim a disproportionate number of mature healthy adults of reproductive age.

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This practice has dramatic consequences.

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Removing reproductive adults, especially for species that mature slowly, can do long-term damage to the entire population.

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The authors thus call humans "super-predators."

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Their report is in the journal Science.

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They write that options to encourage more sustainable exploitation could include reducing the take,

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but also mimicking other predators and leaving full-grown adults alone to continue repopulating their habitats.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

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