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3 June 2010 | www.nature.com/nature | $10 THE INTERNATIONAL WEEKLY JOURNAL OF SCIENCE<br />
SPREADING<br />
THE RISK<br />
Population diversity boosts<br />
fishery resilience<br />
UNDER THE VOLCANO Naturejobs<br />
Polar research<br />
An eruption of science<br />
COSMIC EVOLUTION<br />
Beyond the standard model<br />
MATHEMATICAL MENTORS<br />
Protégé performance across<br />
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Vol 465 | 3 June 2010 | doi:10.1038/nature09060<br />
LETTERS<br />
Population diversity and the portfolio effect in an<br />
exploited species<br />
Daniel E. Schindler1, Ray Hilborn1, Brandon Chasco1, Christopher P. Boatright1, Thomas P. Quinn1, Lauren A. Rogers1<br />
& Michael S. Webster2<br />
One of the most pervasive themes in ecology is that biological diver-<br />
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