Migratory river fish populations plunge 76% in the past 50 years
World Fish Migration Foundation ‘Populations of migratory river fish around the world have plunged by a “catastrophic” 76% since 1970, an analysis has found. The fall was even greater in Europe at 93%, and for some groups of fish, with sturgeon and eel populations both down by more than 90%. Species such as salmon, trout and giant […]