How salmon hatchery operations affect fish welfare and how best practices can improve outcomes for hatchery fish and wild populations.
Salmon hatcheries represent a unique intersection of conservation intent and welfare responsibility. Fish are raised with the explicit goal of supplementing wild populations, yet hatchery conditions often compromise both individual fish welfare and wild population integrity. The welfare of billions of hatchery fish during their production phase, and the welfare of wild fish through interbreeding effects, are both legitimate welfare concerns. Progressive hatchery management increasingly incorporates welfare principles including appropriate density, environmental enrichment, predator conditioning, and careful post-release monitoring to maximize both individual fish welfare and wild population benefits.