Pacific salmon migrations are among nature most remarkable journeys, but they involve extreme physiological stress and welfare challenges. Understanding these challenges informs both conservation and welfare perspectives.
Wild salmon migration involves extraordinary physiological demands that cause measurable welfare costs. Immune suppression, starvation, and physical exhaustion accompany the upstream journey. Anthropogenic additions including dams, water temperature increases from climate change, and poor water quality compound these natural stressors. Conservation actions that remove dam barriers, maintain cool clean water, and protect riparian habitat reduce the welfare burden on migrating salmon while also supporting population recovery.