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Nature 414, 493-494 (29 November 2001) | doi:10.1038/35107167

When one whale matters

Peter Kareiva

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North Atlantic right whales once faced extinction and are still under threat today. But the population decline could be halted if the lives of just a few females were spared each year.

The northern right whale is one of the rarest mammals in the world. Hunted nearly to extinction in the nineteenth century, right whales have been protected for the past 65 years.