Marine & Aquatic

Wild Salmon River Migration Barriers and Welfare

Artificial barriers in rivers prevent salmon migration, causing physiological stress and population collapse with significant welfare implications.

Key Facts

Over 1 million barriers exist in European rivers, blocking migratory fish passage
Atlantic salmon have declined by over 70% in Europe since the 1970s
Fish passes and bypass channels enable migration but vary widely in effectiveness
Spawning failure from blocked migration causes population-level welfare harm
Barrier removal is increasingly funded by river restoration programmes across Europe

Welfare Considerations

Salmon attempting to migrate past impassable barriers experience physiological stress as their migration drive goes unfulfilled. Delayed migration depletes energy reserves needed for spawning. Barrier removal restores natural behaviour and is a high-impact welfare and conservation intervention.

What You Can Do

Support river restoration and barrier removal organisations in your region
Advocate for fish passage requirements in planning approvals for new river infrastructure
Donate to Atlantic salmon conservation programmes addressing migration barriers
Participate in citizen science monitoring of salmon migration and spawning