I'm a little disappointed in you Ridgeway, I provided what I thought was a unbiased scientific opinion on why Alaskan chinook salmon stocks are taking a dump, and you didn't even bother to read it.
Note the first sentence where it says Alaska.


Salmon stocks from Alaska have been highly productive since the 1976 regime change in the North Pacific, an estimated 3 times more productive than in the 1946-75 period. The periods of increased salmon production correspond to an eastward shift of the Aleutian Low pressure system which produces more frequent and severe winter storms, and a warming of the surface waters in the Gulf of Alaska. This shift between warm and cold periods is now called the Pacific Decadal Oscillation or PDO. The warmer conditions and increased nutrient levels from upwelling in the central Alaska gyre carried northward toward the coast may have contributed to the observed increase in plankton, a source of food for young salmon in the ocean, and thereby to increased Alaskan salmon production. The exact mechanisms that enhanced production are still being investigated, but the change in Alaskan salmon production in the two regimes is well documented. Salmon stocks from California, Oregon, and Washington have increased and decreased out of phase with the fluctuations in salmon in Alaska--and this "reciprocal oscillation" has been going on for the 70 years of available records.