PROTECTING & IMPROVING THE TAY SYSTEM
ALTERING RUTHVEN BURN WEIR
The Ruthven Burn is a productive tributary of the River Earn, joining the river near Aberuthven. A large weir has been identified upstream of Auchterarder which is impassable to migrating salmon and sea trout.
We have surveyed the fish population a short way downtream of this obstruction and found a very dense population of juvenile trout, almost certainly mainly sea trout. Above the weir there was a much lower density of trout. As these trout had a high growth rate, the stream is clearly understocked, as would be expected.
Given the obvious productive capability of this burn, the area upstream of the weir would be a significant addition to sea trout spawning habitat in the Ruthven Water and indeed in the context of the River Earn. (Sea trout spawning is mainly restricted to smaller streams, unlike salmon.)
We are currently investigating options to make this weir passable.