Data from: Human-mediated evolution in a threatened species? Juvenile life-history changes in Snake River salmon

Robin S. Waples, Anna Elz, Billy D. Arnsberg, James R. Faulkner, Jeffrey J. Hard, Emma Timmins-Schiffman & Linda K. Park
Evaluations of human impacts on Earth's ecosystems often ignore evolutionary changes in response to altered selective regimes. Freshwater habitats for Snake River fall Chinook salmon (SRFCS), a threatened species in the U.S., have been dramatically changed by hydropower development and other watershed modifications. Associated biological changes include a shift in juvenile life history: historically essentially 100% of juveniles migrated to sea as subyearlings, but a substantial fraction have migrated as yearlings in recent years. In...
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