IMO - its been WAY too short of a time frame to draw anything conclusive. La Nina and El Nino years have cyclical affects on current, nutrients and salmon populations, so you have to at least go through several cycles of each for a proper study.

NOAA - El Nino's effects on Salmon Populations and Movement

They say we are shifting to an El Nino right now.

El Nino Summer 2014 frown
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