Anglers fear that the release of beavers into Loch Lomond will damage riverbanks, harm the Atlantic salmon population and end up costing landowners - as well as the public purse.
Last month approval was given to controversial plans to release beavers at the Loch Lomond National Nature Reserve in Gartocharn.
NatureScot approved a licence application from RSPB Scotland to release a family of beavers at Aber Burn, saying they believe that speeding up the natural colonisation process by releasing beavers will help to improve population numbers and genetic diversity, ‘delivering a wide range of benefits for nature in the national park’.