Had a nice walk up the Burn of Lochy and one of its tributaries the Allt Iomadaidh (how do you pronounce this?) yesterday. The aim was to check out the sea trout spawning (I wasn’t disappointed) and to have a look at the habitat. I had only visited parts of these burns before to complete electrofishing survey sites so it was good to be able to spend a bit more time learning a little more about this part of the catchment.
The Burn of Lochy is a tributary of the Avon which it joins on the west bank just upsteam and opposite Tomintoul Distillery. The Allt Iomadaidh is the smaller of the two main tributary; the other is the Burn of Brown but it is inaccessible due to a waterfall at the Bridge of Brown. I started my walk in the Iomadaidh but I’ll start this report in the Lochy and progress upstream.
As soon as I started walking up the Lochy the sea trout redds were apparent. There was an abundance of spawning gravel in the middle reaches of the Lochy, more so now after the big August spate, probably to the extent that the fish could be very choosy where they spawned.
I didn’t count the redds in the Lochy itself but I was impressed, there must have been hundreds in the 2.8km stretch I walked.
I took a distinct fancy to the Allt Iomadaidh when we surveyed it a couple years ago so I was keen to explore a little more of it. We completed two electrofishing sites then, both of which supported good salmon and trout populations. As with the Lochy I spotted the first redd as soon as I approached the bank.
As I went further upstream I started finding more sea trout remains.
Just upstream of where the Allt Catanach joins the Iomadaidh there was a short section of great spawning gravel.
Progressing upstream the surrounding terrain closed in to form a nice steep sided valley. The steeper, rocky ground, hinted that I would soon reach the limit of fish accessibility so I wasn’t surprised that the second waterfall encountered looked impassable.
I marked all the redds in the Allt Iomadaidh using the GPS and whilst I haven’t downloaded it yet I know that I started on waypoint 17 and ended on 63, although the last was the waterfall location. Forty five or so redds in that wee burn was more than enough. I only saw one live adult fish, a cock sea trout, all the spawning activity in the Iomadaidh was over. Pity I hadn’t gone up there last weekend.