Comprehensive river restoration is the most effective welfare and conservation intervention for declining Atlantic salmon populations.
Wild Atlantic salmon welfare is inseparable from river health. Individual salmon attempting to spawn in degraded rivers face thermal stress from unshaded channels, physical barriers from weirs, and starvation from impoverished invertebrate communities. Population-level decline reduces genetic diversity and resilience. River restoration — the most effective intervention — requires coordinated action across land ownership, farming practices, and water abstraction policy. Individual welfare improvement is not achievable without ecosystem-level change.