Salmon hatcheries supplement wild populations for angling and conservation - welfare during rearing and release affects both individual fish and wild population health.
Salmon hatchery welfare sits at the intersection of fish welfare, conservation genetics, and angling management. Welfare conditions in hatcheries vary dramatically - high density, poor water quality, and rough handling during transfer cause significant stress and welfare harm in poorly managed facilities. The wider ecological and welfare question is whether hatchery stocking programmes benefit wild populations - evidence is mixed, with some studies showing negative effects on wild salmon fitness. Conservation hatcheries for genuinely critically depleted populations have clearer welfare justification than commercial stocking for angling. Best practice involves both welfare-positive hatchery conditions and evidence-based decisions about stocking benefit.