The provincial government of Rovigo, in the Veneto region in the north of Italy, has offered to pay fishermen 26 cents for every kilo of catfish they catch in the river Po. These giants, which are estimated to make up 27 per cent of the fish in the river Po, have been a menace for several years as they are upsetting the environmental balance. A similar initiative five years ago resulted in 35 tons of these aggressive animals being destroyed.