Threatened salmon rely on a rare life history strategy in a warming landscape

Flora Cordoleani, Corey Phillis, Anna Sturrock, Alyssa FitzGerald, George Whitman, Anthony Malkassian, Peter Weber & Rachel Johnson
Rare phenotypes and behaviours within a population are often overlooked, yet they may serve a heightened role for species imperilled by rapid warming. In threatened spring-run Chinook salmon spawning at the southern edge of the species range, we show late-migrating juveniles are critical to cohort success in years characterized by droughts and ocean heatwaves. Late migrants rely on cool river temperatures over summer, increasingly rare due to the combined effects of warming and impassable dams....
1 citation reported since publication in 2021.
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