(Onchorhynchus tschawytcha). Between 1875 and 1880 unsuccessful attempts were made to establish quinnat, native to the Pacific coast of Canada and the northern United States, but large-scale releases into the Waitaki River system ex the Hakataramea hatchery from 1901 to 1942 were successful. The first adults returned from the sea in 1905. From the Waitaki, quinnat spread north as far as the Waiau by about 1920. It appears the Clutha River and Lake Okarito stocks resulted from single liberations made in 1917 and 1935 respectively.