PNWA Report Says Research On Delayed Mortality Effects Of Lower Snake River Dams On Salmon, Steelhead Inconclusive

Do the effects of juvenile salmon and steelhead passage through the four lower Snake River dams carry over into later life stages, contributing to high mortality in the ocean and far too low smolt-to-adult returns to the Snake River basin? In other words, does the stress of dam passage lead to delayed mortality?

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