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Ocean conditions experienced by Pacifi c salmon (Oncorhynchus spp.) during the fi rst winter at sea may aff ect the productivity of Asian and North American populations. We evaluated potential correlations between annual commercial catches of fi ve species of Pacifi c salmon and sea surface temperature anomalies during winter in the Bering Sea and North Pacifi c Ocean (October–April 1982–2013). The strongest correlations were restricted to the region south of the Aleutians (40°–50°N latitude, 160°E–170°W longitude), and were generally stable over time for both Asian and North American salmon. In the Bering Sea, correlations were slightly negative or neutral (close to zero), as expected, given that most juvenile Pacifi c salmon leave the Bering Sea during winter. North Pacifi c waters south of the Aleutians correspond to a known area of high abundance of juvenile salmon in winter. The direction of correlations in this region was generally positive for highly abundant species (pink, chum, and sockeye) and negative for low abundance species (coho and Chinook). These diff erences may refl ect density eff ects between high and low abundance species during their fi rst winter at sea.

Correlations between Winter Sea Surface Temperatures in the North Pacific Ocean and Continental-Scale Commercial Catches of Pacific Salmon, 1983–2013