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Diversified portfolio yields benefit for salmon stocks

Local diversity helps keep sockeye from going bust every few years

As Dr. Seuss noted, it’s good to have both red fish and blue fish. A new study of a salmon fishery expands on this concept, showing the importance of having lots of different red fish.

The millions of sockeye salmon that spawn in the watershed of Alaska’s Bristol Bay each year represent several hundred distinct populations of the same species, says ecologist Daniel Schindler of the University of Washington in Seattle.

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