Stocking programs release millions of farmed fish into wild waters annually for sport and conservation, with complex welfare implications for both released and resident animals.
Stocking programs create welfare challenges at multiple points. Hatchery conditions often produce fish poorly adapted to wild life, leading to high post-release stress and mortality. Wild resident fish may face increased competition and disease pressure. For conservation stocking of endangered species, welfare protocols during transport, acclimation, and release are critical. Recreational stocking programs should be evaluated against wild population impacts and individual fish welfare costs.