Abstract
Cross-spectral analysis of physical oceanographic variables (sea level, sea-surface temperature, and salinity) along coastal regions of the Northeast Pacific Ocean produced coherent signals with periods of 5–6 years (among other frequencies). Annual sockeye salmon (Oncorhynchus nerka) and Pacific herring (Clupea harengus pallasi) recruitments were coherent with the 5–6 year signal from British Columbia to southeastern Alaska. Research is proposed to determine if interannual temperature, salinity and current oscillations associated with baroclinic waves affect the structure of fish populations by altering migration speeds and productivity of the food supply for fish populations.
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