The study has been launched in response to a recent escape of farm-raised salmon and will be managed by the wild-fish conservation body Fisheries Management Scotland, supported by scientists from Marine Scotland Science, and funded by Mowi Scotland.
The multi-year study of 115 sites aims to confirm wild salmons current genetic profile and to track for the potential of genetic changes should interbreeding of farmed and wild salmon occur.
In late August, Mowi Scotland confirmed that 48,834 farm-raised salmon escaped from its Carradale farm in the Firth of Clyde after it became detached from its seabed anchors during a combination of strong weather events.
Since the escape, Fisheries Management Scotland has been working with member District Salmon Fishery Boards and Fisheries Trusts, as well as angling associations, to monitor the situation and mitigate where possible. Escaped farmed salmon have been caught by anglers in multiple rivers across Loch Lomond, Ayrshire, Clyde, Argyll and in rivers in north-west England.
The priority for Fisheries Management Scotland and their members has been to ensure that any farmed fish are removed from the rivers, humanely dispatched, and scale samples submitted to enable accurate identification, and Mowi has committed to support these actions.
Dr Alan Wells, chief executive of Fisheries Management Scotland, said: We are very disappointed that this escape has occurred. The Carradale North farm is a new development, and we are all agreed it is not acceptable for such escapes to occur. It is crucial that lessons are learned, and that appropriate steps are taken to avoid such escapes happening in future.
We have welcomed Mowis commitment to work with us and to fund a comprehensive genetics study that will help us better understand the potential impacts. We will continue to engage with the industry and regulators, with a view to improving the situation for wild salmon and sea trout.
Ben Hadfield, COO of Mowi Scotland, said: I would like to thank Fisheries Management Scotland and their member District Salmon Fishery Boards and Fisheries Trusts for their efforts to remove these fish from rivers across the Firth of Clyde, and apologise for any disruption and concern this escape has caused all those with an interest in wild salmon. We have learned the root cause of the escape system anchor lines crossing and resulting in friction failure and acknowledge our responsibility to quickly learn from this event to prevent it from occurring again.
Polly Burns, aquaculture interactions manager at Fisheries Management Scotland, added: We would like to thank anglers for their continuing efforts to capture and report farmed fish entering our rivers. We have received about 150 reports of farmed fish captures from a range of rivers both within and out with the Firth of Clyde and we continue to urge anglers to report catches of farmed fish, using the reporting system on our website.
The Health and Welfare of Atlantic Salmon course
It is vital that fish farm operatives who are responsible for farmed fish are trained in their health andwelfare. This will help to ensure that fish are free from disease and suffering whilst at the same timepromote good productivity and comply with legislation.
This new and comprehensive study of genetic introgression aims to add to the understanding of one of the potential pressures on Scotlands wild salmon, which are approaching crisis-point. The Scottish Government has identified a range of high-level pressures on wild salmon to also include: over-exploitation, predation, invasive species, habitat loss and inshore commercial fisheries.
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Study will investigate the genetic impact of escaped farmed salmon - The Fish Site
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