With Higher Spill At Dams, Detecting Survival Of PIT-Tagged Juvenile Salmon, Steelhead Extremely Elusive, Creating Key Data Gap

The precision of estimating salmon and steelhead smolt survival rates through Snake and Columbia river dams during the 2023 spring outmigration is remaining elusive. This is the fifth straight year that high levels of court-ordered spill at Columbia and Snake river dams have impacted detection rates of the tagged juveniles as they migrated downstream through eight dams.

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