Captive-bred populations of a partially migratory salmonid fish are unlikely to maintain migratory polymorphism in natural habitats.

Abstract excerpt

Variation in life history is fundamental to the long-term persistence of populations and species. Partial migration, in which both migratory and resident individuals are maintained in a population, is commonly found across animal taxa. However, human-induced habitat fragmentation continues to cause a rapid decline in the migratory phenotype in many natural populations. Using field and hatchery experiments, we...

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