UN Report Finds Migratory Freshwater Fish Declined 81% Since 1970
A UN/CMS report highlights habitat loss, dams, and overfishing as key causes for an 81% decline in migratory freshwater fish since 1970, urging international cooperation.
- On Tuesday, a United Nations report released at the COP15 summit in Campo Grande, Brazil, detailed rapid collapse of migratory freshwater fish populations, urging "urgent coordinated cross-border collaboration" to prevent further losses.
- Migratory freshwater fish populations have plummeted by roughly 81% since 1970, driven by dam construction, habitat fragmentation, pollution, and overfishing that disrupt essential spawning and feeding corridors.
- Dr. Zeb Hogan, biology professor at the University of Nevada, Reno, identified 325 species as candidates for urgent international protection, with 97% of currently listed species facing extinction.
- Brazil and regional governments are proposing a Multi-species Action Plan for Amazonian Migratory Catfish, targeting priority basins including the Amazon, Ganges-Brahmaputra, and Nile for coordinated management.
- Managing rivers as connected ecological systems rather than isolated national waterways is the only fundamental solution to ensure species recovery, as experts emphasize that "rivers don't recognize borders.
36 Articles
36 Articles
Freshwater fish populations plunge 81% as river migrations collapse
A sweeping global report finds that migratory freshwater fish are in steep decline, with populations down roughly 81% since 1970. These species depend on long, connected rivers, but dams and human pressures are cutting off their routes. Hundreds of species now need coordinated international protection. Experts say restoring river connectivity is critical to preventing further collapse.
A new and alarming UN report, presented at the Fifteenth Meeting of the Conference of the Parties (COP15) to the Convention on the Conservation of Migratory Species of Wild Animals (CMS), reveals a devastating reality for our world. According to this technical paper, migratory fish stocks that inhabit rivers around the planet have suffered an average collapse of 81% if we look back until the year 1970. This free fall places fish among the most p…
The report traces the rapid decline to a combination of dam construction, fragmentation of rivers, pollution, overfishing and the effects of climate change.
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