Invasion of the salmon

Chinook are rapidly spreading into the rivers of Chile and Argentina.

By Susan Milius, 10:24 AM June 10, 2008

Hard to believe it’s the same species. But the chinook salmon, conservation heartbreak of the U.S. West Coast, is invading and thriving in South America.

Chinook, or king salmon, largest of the five North American salmon species, reached South America some 25 years ago as people tried to farm them there, says Cristián Correa of McGill University in Montreal. Now a broad survey of records and stream visits finds chinook reproducing on their own in at least 10 Andean watersheds th...

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