Conservationists capture and record 13,000 fish during a month-long study on the River Frome.
Salmon numbers are not sustainable in 74% of rivers in England and Wales, according to the Environment AgencyConservationists have been surveying salmon in a Dorset river in a bid to tackle a huge decline in the species.
The month-long survey between Evershot, near Dorchester, and Poole Harbour is carried out by the Game and Wildlife Conservation Trust. Dylan Roberts, the charity's head of fisheries, said: "If you went back to the 1970s and 80s, about 15-20% of the salmon that went to sea would return as adults - now that figure is about 4-5%.
The team used a low-voltage electric field to stun the salmon and trout which were captured and recorded on site before being returned, unharmed, to the water.Data from the River Frome and 11 other European rivers is used to inform governments, and to encourage farmers and water companies to improve their operations.revealed salmon stocks were below sustainable levels in 74% of rivers in England and Wales.
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