Coho salmon conservationists in Marin County are losing hope they’ll see large numbers of the fish return to spawn this year, even after our recent rains. Marine biologists say the future looks grim after a series of drought years, and they’re looking for ways to stop the fish from being sucked into what they call “the vortex of extinction.” Dan Brekke reports.

Saving Coho 6 July,2011

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