After checking the footage and discovering Mullen in action, they tracked down his son Daryl, 20, and found three dead salmon stuffed into his rucksack in the boot of a car.

Mullen snr, of Meigle , near Blairgowrie, and his son, who lives in Dundee, admitted fishing for salmon other than by rod and line on May 29 last year and taking salmon from the river without permission.

Sheriff Marion McDonald ordered unemployed Mullen snr to carry out £150 worth of unpaid work as part of a community payback order.

Mullen jnr was fined a total of £360.