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The disturbing trend of the lack of juvenile/jack salmon has been observed on virtually every river in the west. On the A, while the adult return was only 1/3 of "normal", the juvenile return was 1/25 of "normal". This does not bode well for the future of salmon with a future population "crash" coming very soon. Expect more restrictions in both comercial and sport fisheries for salmon in the near future. Most scientists think that the current decline is caused by the lack of upwelling in Pacific waters, which in turn decreases the food supply. The cause of the lack of upwelling is not completely understood, but many scientists tie this in with global warming effects.
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