Sampling of individual adult salmon is used to collect information on the size, sex and age of the fish. This information feeds directly into the stock assessments used for national and international management of Scottish salmon. Sampling of...

The National Electrofishing Programme for Scotland (NEPS) provides a national scale statistical survey of Scotland’s salmon rivers (Jackson et al., 2025). The foundation of the programme is a statistical survey design that ensures collection of...

The Shieldaig trap is long term monitoring site focussed on salmonids and operating since 1999. During some years these have also operated as downstream eel traps, resulting in years with complete, partial or absent annual count data as follows...

The Girnock and Baddoch catchments are long-term monitoring sites where the population dynamics of spring salmon have been assessed since 1966 and 1988 respectively. These sites include a pair of fixed traps designed to catch emigrating juvenile...