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The untapped potential of CMS for migratory freshwater fishes

The Convention on the Conservation of Migratory Species of Wild Animals (CMS) provides a global framework for protecting migratory species, yet freshwater fishes remain underrepresented in the CMS appendices. Strengthening links between research, science communications, policy development and CMS implementation can generate synergistic effects that enhance conservation of migratory freshwater fishes.

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References

  1. UNEP-WCMC. State of the world’s migratory species. cms.int https://www.cms.int/en/publication/state-worlds-migratory-species-report (2024).

  2. Worthington, T. A. et al. Global swimways for the conservation of migratory freshwater fishes. Front. Ecol. Environ. 20, 573–580 (2022).

    Article  Google Scholar 

  3. Sayer, C. A. et al. One-quarter of freshwater fauna threatened with extinction. Nature 638, 138–145 (2025).

    Article  CAS  Google Scholar 

  4. IUCN. The IUCN Red List of Threatened Species, version 2025-2. IUCN https://www.iucnredlist.org (2025).

  5. Sayer, C., Hughes, K., Zimmerman, B. & Estupiñán, G. Freshwater Fishes of Potential Interest for Inclusion in CMS. IUCN, Gland, Switzerland. IUCN https://iucn.org/resources/information-brief/freshwater-fishes-potential-interest-inclusion-cms (2024).

  6. Deinet, S. et al. The Living Planet Index (LPI) for Migratory Freshwater Fish 2024 Update: Technical Report (World Fish Migration Foundation, 2024).

  7. Stoffers, T., Sayer, C. A., Baratech, A. & He, F. ‘Global swimways’ on free-flowing rivers will protect key migratory fish species. Nature 627, 489 (2024).

    Article  CAS  Google Scholar 

  8. He, F. et al. Hydropower impacts on riverine biodiversity. Nat. Rev. Earth Environ. 5, 755–772 (2024).

    Article  Google Scholar 

  9. Winemiller, K. O. et al. Balancing hydropower and biodiversity in the Amazon, Congo, and Mekong. Science 351, 128–129 (2016).

    Article  CAS  Google Scholar 

  10. Caldas, B. et al. Identifying the current and future status of freshwater connectivity corridors in the Amazon Basin. Conserv. Sci. Pract. 5, e12853 (2023).

    Article  Google Scholar 

  11. Murchie, K. J., Knapp, C. R. & McIntyre, P. B. Advancing freshwater biodiversity conservation by collaborating with public aquaria. Fisheries 43, 172–178 (2018).

    Article  Google Scholar 

Download references

Acknowledgements

The authors were supported by the Science & Technology Fundamental Resources Investigation Program (grant no. 2025FY101302), the Chinese Academy of Science (E529S101), the Leibniz Competition project ‘Freshwater Megafauna Futures’, and PlusFish Philanthropy. S.C.J. considers this a contribution to DANUBE4all, a project of European Union’s Horizon Europe innovation action programme (grant agreement no. 101093985).

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Correspondence to Fengzhi He.

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Related links

Appendix I and Appendix II of CMS: https://www.cms.int/species

CMS instruments: https://www.cms.int/cms-instruments/agreements

The 15th Meeting of the Conference of the Parties to the CMS (CMS COP15): https://www.cms.int/cop15docs

The Convention on the Conservation of Migratory Species of Wild Animals (CMS): https://www.cms.int/what-are-migratory-species-and-what-role-cms

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He, F., Hogan, Z., Jähnig, S.C. et al. The untapped potential of CMS for migratory freshwater fishes. Nat. Rev. Biodivers. 2, 4–6 (2026). https://doi.org/10.1038/s44358-025-00115-z

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