Wild Atlantic Salmon: Welfare in Natural and Managed Populations

Wild Atlantic salmon face multiple welfare threats from habitat degradation, disease pressure from farms, and barriers to migration. Their welfare deserves consideration alongside conservation.

Key Facts

Atlantic salmon populations have declined by 70% since the 1970s — many rivers have lost their runs entirely
Migration barriers including dams prevent salmon from reaching spawning grounds, causing reproductive failure and death
Sea lice from salmon farms infect wild juvenile salmon, causing significant welfare harm and mortality
Spawning itself is physiologically costly — Pacific salmon species die after spawning; Atlantic salmon may survive to spawn again
Catch-and-release fishing causes stress responses that persist for hours after release and can impair survival
River habitat degradation through agricultural run-off and channelisation reduces quality of feeding and spawning habitats
Climate change is warming rivers beyond preferred temperature ranges in the southern extent of the range

Welfare Considerations

Wild Atlantic salmon face welfare challenges across their life cycle, from the stress of navigating degraded river habitats and migration barriers to infection with sea lice from nearby fish farms. The welfare of individual salmon — fish whose sentience is now well-established through research — deserves attention alongside population-level conservation concerns. Sea lice cause tissue damage, haemorrhaging, and immune stress; migration barriers cause physical exhaustion and reproductive failure; catch-and-release angling causes physiological stress that takes hours to resolve. Addressing wild salmon welfare requires action on multiple fronts: removing or mitigating migration barriers, reducing sea lice pressure from adjacent farms, improving river water quality, and adopting best-practice catch-and-release protocols.

What You Can Do

Support organisations working on river restoration and migration barrier removal
Advocate for better management of sea lice from salmon farms to protect wild populations
Use best-practice catch-and-release techniques if you fish for salmon — minimise handling time
Support wild Atlantic salmon conservation programs working on habitat restoration
Oppose river development projects that would further degrade salmon habitat