The Welfare of Wild Salmon During Migration

Wild salmon face a gauntlet of welfare challenges during their spawning migrations — many human-caused.

Key Facts

Pacific salmon runs have declined by over 50% since the 1960s in many rivers
Dams block upstream migration — fish ladders help some species but not all equally
Warm water temperatures from climate change impair salmon physiology during migration
Salmon die after spawning — their bodies nourish riparian ecosystems for weeks

Welfare Considerations

Wild salmon migration is one of nature's most extraordinary welfare journeys — animals that stop feeding, run physiological gauntlets of predators and obstacles, and ultimately die after spawning. Human interventions amplify the welfare challenges. Dams block migration routes or create warm water pools that stress salmon physiologically. Agricultural runoff warms rivers and reduces oxygen. Hatchery fish competing for resources reduce food availability. While salmon mortality after spawning is natural, the extent to which human activities make the migration itself more stressful and lethal is a welfare concern.

What You Can Do

Support dam removal or fish passage improvement projects
Advocate for water temperature management to protect salmon migration corridors
Choose wild salmon from well-managed fisheries with documented sustainability
Support riparian restoration that shades rivers and improves salmon habitat