The most basic objective of fisheries management is to make sure enough adults return to spawn and fully seed their nursery areas for the next generation. This is best known if the returning fish of each species and stock can be counted and egg deposition estimated. The Tweed Foundation run fish counters on the Ettrick, the Gala and the Whiteadder, producing data on the run times, size distributions and the numbers of Salmon and Trout (Sea Trout and Brownies) returning to the Tweed catchment to spawn.
Each of the three counters has an infrared scanner to estimate the length of each fish and a camera for species identification and counter validation. This enables us to estimate the number of Salmon and Trout that return to the tributaries each year and record the length of each fish which are used to estimate total egg deposition. The fish counters are therefore invaluable for providing objective monitoring of Salmon and Trout stocks throughout the Tweed catchment.