Wild Salmon Welfare: Challenges in Natural River Systems

Wild Atlantic salmon face significant welfare threats from river pollution, overfishing, climate change, fish farm sea lice, and barriers to migration that affect populations and individual fish welfare.

Key Facts

Atlantic salmon populations have declined dramatically, with some UK rivers losing over 90% of their salmon
Salmon face welfare threats during upstream migration including fish passage barriers, warm water, and low oxygen
Sea lice from fish farms affect migrating wild salmon smolts passing through coastal farming areas
Predation by seals, cormorants, and other predators is significant at river entry points
Climate change is warming rivers beyond optimal temperatures for salmon during summer migrations

Welfare Considerations

Wild salmon welfare is affected by multiple stressors acting cumulatively during their complex lifecycle. Fish struggling through low-oxygen warm rivers in summer experience physiological stress comparable to extreme exercise. Sea lice infestations on juvenile salmon weaken them for ocean migration. Fish passage barriers cause physical exhaustion and injury. The welfare and conservation interests align: improving river conditions, reducing fish farm sea lice, and restoring connectivity benefits both individual salmon welfare and population survival.

What You Can Do

Support river restoration projects that improve water quality, temperature, and connectivity for salmon
Engage with campaigns to reform sea lice management in fish farms near wild salmon rivers
Support organisations working on salmon migration barriers and fish pass installation
Choose wild salmon from certified sustainable sources where fishing is well-managed
Advocate for stricter regulation of river temperatures and water quality to protect salmon welfare