The lives of migratory fish are incredible. The number of hardships they encounter in their lifespan make their return to our region nearly a miracle! Ocean conditions are changing big time but what does that really mean for salmon and migratory fish?

We recently interviewed Nate Mantua, Climate Scientist with NOAA, and learned some disturbing facts. For example, did you know huge schools of anchovy are dominating the food web off the coast in California and impacting vitamin B (thiamine) levels in juvenile Chinook salmon? The conversation also revealed some disturbing trends in food web shifts, ocean temperature fluctuations and other issues we should be aware of as our Upper Columbia fish migrate. While the open ocean may be out of our control, it is essential we have some knowledge of what our fish may endure as they make their way “home”.

Support research:

Supporting links:

One hundred-seventy years of stressors erode salmon fishery climate resilience in California’s warming landscape. Global Change Biology 28(7):2183-2201.

Are long-term changes in mixed layer depth influencing North Pacific marine heatwaves? Bulletin of the American Meteorological Society 102(1):S59-S66.

Habitat compression and ecosystem shifts as potential links between marine heatwave and record whale entanglements. Nature Communications 11:536 (12 p.).

Projecting marine mammal distribution in a changing climate. Frontiers in Marine Science 4:413 (14 p.).

Thiamine deficiency research links:



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