In brief
A new UN report reveals that migratory fish populations, crucial for ecosystems and human livelihoods, have declined by 81% in the past half-century due to factors like damming, pollution, and overfishing. Conservation experts are prioritizing thirty specific species for urgent protection, emphasizing the necessity for coordinated international efforts to restore and preserve migratory routes.
Fish species that undertake mammoth migrations through rivers, lakes, and ponds are facing a combined threat from dams, pollution, and overfishing preventing them from reaching their breeding grounds.
The golden mahseer and goonch catfish are among thirty flagship species prioritized for global conservation in a new UN report, which assessed over 15,000 species of freshwater migratory fish—all of which make up half of all fish species. The findings indicate that their numbers have plummeted by an estimated 81% in the last fifty years.
The authors stress that these species, often overlooked, are an essential part of people's livelihoods, with Dr. Zeb Hogan, co-author of the report, noting that migratory freshwater fish support hundreds of millions globally.
Overfishing and Habitat Loss
These declining populations face threats from overfishing and habitat loss, particularly in Europe, where fish encounter barriers every kilometer on average, often resulting in significant disruptions to their migration routes.
The UN now proposes adding 30 fish species to its treaty for monitoring and support, advocating for collaborative international action to protect these crucial migratory fish.
