Two poachers have been convicted after one was caught red-handed on hidden cameras operated by water bailiffs.
The devices, more commonly used to track wildlife in Africa and South American jungles, recorded Thomas Mullen as he poached salmon at Cargill's Leap on the River Ericht in Perthshire.
Mullen, 57, was seen using a weighted treble hook on a wire to catch the fish on May 29, 2011, a practice known as "sniggering".
Water bailiffs had set the cameras up earlier the same day because low waters meant dozens of salmon were crammed into pools waiting to pass through channels downstream.
After checking the footage and discovering Mullen in action, they tracked down Thomas' son Daryl Mullen, 20, and found three dead salmon stuffed into his rucksack.
He told the Tay District Salmon Fisheries Board bailiffs: "I found the fish. It was old fish at the side of the water."
Perth Sheriff Court was told that the three salmon could have been worth as much as £450, while the loss to the economy equated to £5000 pounds per fish.
The court was told that Cargill's Leap was "a well-known haunt for poachers" and the cameras were set up because there were so many salmon held up in the pools.
Thomas Mullen, Strathmore Place, Meigle, and Daryl Mullen, Tullideph Road, Dundee, admitted fishing for salmon without permission on May 29. Daryl Mullen also admitted having three salmon later the same day.
Sheriff Marion McDonald told Mullen snr: "You have a lengthy record but only one for a similar offence and that was some time ago. I am concerned that you don't seem to understand the seriousness of what you have done."
She ordered him to carry out 150 hours unpaid work as part of a community payback order, while Daryl was fined £360.
Thomas Mullen's solicitor David Holmes said his client was happy to complete community work as he "enjoyed it" and wanted to make a contribution to society.