The world’s great fish migrations are collapsing – that’s a problem for millions of people
- Written by Zeb Hogan, Professor of Biology, University of Nevada, Reno
Mahseer swim in the Ramganga River, a major tributary of the Ganges River in South Asia.Zeb HoganHidden beneath the surface of the world’s rivers, some of Earth’s great animal movements unfold – migrations that rival, in sheer biomass, the famous mass movements of zebra and wildebeest across the Serengeti.
For centuries, fish...