Pacific salmon hatcheries releasing billions of juveniles annually are beginning to incorporate welfare standards that improve fish health and wild population support.
Hatchery salmon welfare has traditionally been framed entirely around survival rates and production economics rather than individual fish experience. However, welfare and conservation goals align: fish experiencing chronic stress from overcrowding have impaired immune function, reduced growth, and poorer post-release outcomes. Reducing densities, improving water quality, and using low-stress handling and crowding protocols during release serve both welfare and conservation goals. Rearing environments that maintain wild behaviors improve both fish welfare and the quality of conservation contribution.