UK: Conservation measures to save Atlantic salmon in Scottish rivers could do more harm than good

A new study by University of Aberdeen professor Chris Soulsby and two salmon biologists raises concerns about the effectiveness and potential harm of conservation measures aimed at saving Atlantic salmon in Scottish rivers, particularly in the Cairngorms region. The researchers criticize the large public funding these schemes receive, their weak scientific foundation, and the risk they pose to salmon habitat. They critique the widespread use of Large Wood Structures (LWS) in upland rivers, which are supposed to enhance salmon habitats but are not shown to be necessary in many cases. The study also warns that engineering activities, such as the use of heavy machinery, can lead to water pollution and habitat degradation. The researchers call for a more science-based approach with thorough environmental assessments, monitoring, and adaptive management. They also highlight that the decline in salmon populations, largely attributed to climate change and reduced food sources in the sea, is not solved by river engineering.