Wild salmon populations face welfare threats from habitat degradation, fish passage barriers, water temperature extremes, and the cumulative effects of human environmental impacts.
Wild salmon welfare encompasses both individual suffering — from physiological stress during migration in warming rivers, sea lice infestations, and exhaustion — and the population-level welfare consequences of ecosystem degradation that reduce survival and reproduction. Individual salmon attempting to migrate through degraded, warm, or obstacle-filled rivers experience genuine physiological distress measurable through stress hormone levels. The welfare of wild salmon is inseparable from the health of river systems, coastal environments, and the regulatory frameworks governing salmon farm impacts on wild fish. Protecting wild salmon welfare requires the same systemic environmental interventions that conservation demands: dam removal, forest protection, temperature management, and regulation of aquaculture impacts.