 In the following decades, the pressure to introduce the Nile perch continued, as did warnings about the possible effects of doing it.The first introduction of Nile perch to the region, done by the Uganda Game and Fisheries Department (then part of the British Colonial rule) and local African fish guards, happened upstream of Murchison Falls directly after the completion of the Owen Falls Dam in 1954.This allowed it to spread to Lake Kyoga where additional Nile perch were released in 1955, but not Victoria itself.