Dorset: "lowest yield ever" of salmon returning to River Frome
The species is now considered endangered
There's been a record low in the number of salmon returning to the River Frome in Dorset.
The Game and Wildlife Trust says it's crashed by 80% over the last 40 years.
Experts only managed to find and tag 3,800 salmon this year, compared to the normal 10,000.
Conservationists have blamed climate change, run-off from agricultural land and excessive algae.
Sophie Elliott is a Fisheries Ecologist at the Frome, and told Hits Radio: "It's going to be an accumulation of all sorts of things.
"We know they're affected by climate change, we know barriers have been a big thing. It doesn't affect all rivers but it stops their migration.
"They're subject to higher human pressures than most species, because of this dual behaviour where they live in the fresh-water environment and marine environments.
"They're subject to terrestrial and river pollution, and as they go out to sea they're subject to things like fishing and climate change."
Ms Elliott said while there is "very little" targeted fishing for salmon now, the species is not making a recovery.