Conserving genetic diversity in wild salmon populations preserves locally adapted traits essential for population resilience and individual welfare under changing environmental conditions.
Wild salmon genetic diversity welfare is a long-term consideration where genetic erosion manifests as population welfare decline over generations rather than individual suffering. Populations that have lost locally adapted genetic variants respond poorly to environmental stress events — drought, temperature extremes, disease outbreaks — because the genetic toolkit for adaptation has been eroded. Conservation genetics that preserves adaptive diversity supports individual welfare by maintaining population resilience. The interaction between hatchery supplementation and wild genetic diversity requires careful management to avoid converting an intended welfare benefit into a long-term liability.