Some of the longest, most important migrations of species on Earth are happening beneath the surface of the world's rivers and many are rapidly collapsing, according to a major new assessment by the ...

Freshwater fish are vanishing from the world’s rivers, with migratory species down 81 percent due to dams, pollution, and ...

Discover the alarming trends in freshwater migratory fish species declines, with an 81 percent population drop since 1970.

Vast journeys, among world’s great wonders, found to be under threat as freshwater fish populations crash by 81% ...