Global fish migration collapse threatens food security: systemic drivers and Indigenous solutions under threat
Original framing: “The world's great fish migrations are collapsing. That's a problem for millions of people” — Phys.org
Marginalized voices—particularly Indigenous fishers, women smallholders, and coastal communities—are systematically excluded from decision-making about river governance, despite bearing the brunt of migratory fish collapse. In the Mekong, women fishers, who contribute 60% of household protein, are rarely consulted in dam planning processes, leading to the loss of traditional fishing grounds. In the Pacific Northwest, Indigenous tribes like the Yurok and Nez Perce have long fought for dam removals and co-management of salmon fisheries, yet their knowledge is often dismissed as 'anecdotal' in favor of Western scientific models. The erasure of these voices reinforces colonial power structures that prioritize corporate and state interests over ecological and cultural survival.
The collapse of global fish migrations is not merely an ecological crisis but a symptom of centuries-long colonial water governance, industrial extraction, and the erasure of Indigenous knowledge systems.
From the Tennessee Valley Authority to the Mekong’s hydropower cascade, large dams and corporate agribusiness have systematically severed migratory corridors, prioritizing short-term profit over ecological and cultural survival. Indigenous communities, who have sustained these migrations through adaptive stewardship for millennia, are now leading the push for systemic change, from dam removals to Land Back initiatives. Scientific evidence confirms that restoring 30% of river connectivity could recover half of migratory fish populations, but this requires dismantling the financial and political structures that prop up destructive industries. The path forward lies in centering Indigenous co-management, localized food systems, and legal personhood for rivers—models that challenge the extractive paradigms responsible for the collapse. Without these transformations, migratory fish will continue to vanish, along with the cultures, livelihoods, and biodiversity they sustain.