The UN assessment of the state of migratory freshwater fish revealed an 81% decline in the last 50 years.
15don MSN
The world’s great fish migrations are collapsing – that’s a problem for millions of people
Hidden 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 ...
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