Early in 1952, walleye fry were stocked for the first time in Utah Lake. Subsequent plants were made in 1954, 1955 and 1956. Altogether, over two million fry have been stocked. By January, 1958, it was felt sufficient time had elapsed for the species to establish patterns of growth, reproduction, food habits and consequent relationships to the new environment . Thus, on January 1, 1958, a Federal Aid to Fisheries project, number DJ F-4-R-5, job T, was initiated. This project was entitled "investigations of Yellow Pikeperch and Channel Catfish of Utah Lake, Utah County." Although the closing date was December 31, 1958, dat a were collected until October, 1959. Funds were allocated by the Utah Fish and Ga.me Department after December 31, 1958, for the continued study. Collection of data on the walleye was taken entirely from March, 19 58, to April, 1960, and all the work included herein is from that period.