Pacific Wild Salmon Welfare and Ecosystem Health

Pacific salmon species perform extraordinary migratory journeys that serve vital ecological functions, yet face severe welfare and population challenges from dams, warm water, and depleted prey that compromise their capacity to complete these journeys.

Key Facts

Pacific salmon species including Chinook, Coho, Sockeye, and Steelhead make migrations of up to 1,500 km from ocean to natal rivers to spawn
Salmon carry ocean-derived nutrients deep into freshwater and forest ecosystems through their bodies after spawning — their deaths fertilise riparian forests
Dams block migratory routes and cause significant welfare harm through injury at turbines, delay, exhaustion, and inability to reach spawning grounds
Warm water temperatures during summer migrations cause heat stress and increase disease susceptibility in migrating salmon
Marine heatwaves have reduced prey availability in Pacific salmon feeding grounds, causing poor body condition before migrations begin
Dam removal programmes in the USA have resulted in dramatic salmon population recovery in rivers where migration barriers were eliminated
Indigenous communities have deep cultural and subsistence relationships with Pacific salmon that make salmon welfare inseparable from human cultural welfare

Welfare Considerations

Pacific salmon welfare during their final upstream migration is an extraordinary biological experience that humans have a responsibility not to obstruct unnecessarily. Fish that are physiologically transformed for freshwater, swimming against powerful currents for hundreds of kilometres while starving, face enough natural challenge without the addition of human-made barriers, warm water from climate change, and depleted ocean prey. Dam removal is one of the highest-impact welfare and conservation interventions available in Pacific salmon ecosystems, with demonstrated rapid recovery following barrier removal. Climate action that reduces ocean warming and precipitation changes also directly benefits salmon welfare by preserving the temperature windows and snowpack that successful migrations depend on.

What You Can Do

Support dam removal campaigns on Pacific salmon rivers in the USA and Canada
Advocate for climate action that preserves the cold water temperatures Pacific salmon migrations depend on
Choose salmon from sources with documented sustainable harvest standards that protect wild populations
Support Indigenous fishing rights and management authority for Pacific salmon watersheds
Donate to organisations working on habitat restoration and fish passage improvement
Engage with aquaculture companies about sea lice management that affects wild salmon migration routes
Participate in salmon population monitoring citizen science programmes in your region