Tay District Salmon Fisheries Board

Protecting and Improving The Tay System

PROTECTING & IMPROVING

TRYING TO UNDERSTAND THE NUMBERS OF SALMON WHICH SPAWN IN THE UPPER LYON

In conjunction with the Tay Foundation and the University of the Highlands and Islands, it is hoped to develop a salmon genetics project in the upper River Lyon. The upper River Lyon is an area affected by hydropower regulation and there have long been concerns that in some areas the survival of juvenile salmon may be less good than in others. Using modern genetic techniques it is possible from samples of juvenile salmon taken from the river to determine how many adult salmon gave rise to these juveniles, and hence for a given number of juveniles in an area how good or bad their survival has been. This should help tell us whether an area subject to varying hydropower flows upstream of Stronuich Dam is worse or better for juvenile salmon survival than immediately downstream of that dam. It might also be used to confirm or otherwise a belief in some quarters that Lyon fish tend to spawn in greater density in the upper Lyon than in the lower Lyon.