Urgent Call to Protect Declining Migratory Fish Populations

Tue Mar 24 2026 15:46:31 GMT+0000 (Coordinated Universal Time)

A new UN report highlights alarming declines in freshwater migratory fish populations, prompting calls for immediate conservation actions to protect these vital species.

Freshwater migratory fish are experiencing drastic declines due to pollution, habitat destruction, and overfishing. Recent assessments show a staggering 81% drop in their populations over the last 50 years. The UN has prioritized 30 flagship species, including the golden mahseer and goonch catfish, for conservation. Experts emphasize the need for international cooperation in protecting these species, crucial for the livelihoods of millions worldwide.

Urgent Call to Protect Declining Migratory Fish Populations

Freshwater migratory fish species are increasingly threatened, facing a dire combination of pressures from dams, pollution, and overfishing that prevent them from reaching critical breeding grounds. Major species like the golden mahseer and goonch catfish are now recognized as priority targets for global conservation efforts, highlighted in a recent UN report.

The report reveals a staggering 81% decline in migratory fish populations over the last 50 years. This alarming statistic reflects the urgent need to address the multiple threats these species face, which are vital to the well-being of billions globally. For too long, these fish have been ignored, yet they are an essential part of people's livelihoods, stated Dr. Zeb Hogan, a key author of the report.

The UN's reassessment of freshwater migratory fish includes over 15,000 species, revealing their pivotal role in sustaining human populations, providing food security, and maintaining aquatic ecosystems. The listed flagship species will benefit from international conservation agreements aimed at reversing their decline.

Dr. Hogan continued, Migratory freshwater fish support hundreds of millions of people around the world, making their protection crucial. For instance, species like the golden dorado migrate long distances, showcasing the extraordinary diversity and resilience of these aquatic animals.

Recent evaluations indicate that of the 325 identified fish needing protection, 30 have been categorized for immediate conservation efforts. This includes species found even in the UK, such as the Allis Shad and Atlantic Salmon, which are at risk due to habitat fragmentation and pollution.

Dr. Janina Gray from WildFish pointed out that barriers in river systems, like dams and weirs, critically disrupt fish migration, contributing significantly to the population declines observed in Europe. These interruptions can substantially deplete the energy reserves of fish and increase their susceptibility to disease and predation, she explained.

To address these challenges effectively, a concerted international effort is necessary, as most migratory fish traverse multiple countries. The UN plans to propose adding these species to its conservation treaty within the next three years, aiming for a renewed commitment to preserving the unique and essential ecological services these fish provide.