**These data have been updated with 2022 data - the updated data are available at https://doi.org/10.7489/12459-1. Please use this link to download the most accurate and up to date data. ** The catch form return time series runs from 1997 to the...

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...