Amazon Migratory Fish Populations Plummet 81%

New data reveals global freshwater migratory fish populations have declined by 81% since 1970, prompting international concern and a conservation plan for key Amazon species. The plan, approved at the COP15, focuses on the dourado catfish and piramutaba, both facing potential collapse in parts of the Amazon due to overfishing and habitat loss.

Hydropower dams are identified as a major threat, blocking migration routes and disrupting breeding cycles, particularly impacting populations in Bolivia and along the Madeira River. The initiative requires coordinated action between Brazil, Bolivia, Colombia, Ecuador, and Peru, including harmonizing fisheries data and addressing the impacts of existing and planned dams. Researchers emphasize that collaboration is crucial for maintaining connectivity in the Amazon basin.

The plan builds on existing efforts, such as citizen science programs collecting data on fish stocks and dialogues between fishers and governments. Peru is also reviewing plans for new dams in the Andes, recognizing their potential impact on migratory fish. While challenges remain, particularly regarding the responsibility for dam-related impacts, stakeholders are optimistic that the broad coalition formed around this issue will lead to positive outcomes.