an excerpt from a study..
"In addition,telemetry studies suggest there may be an upstream movement of walleye in the Athabasca River in the fall, which may be a feeding movement associated with walleye following the large lake whitefish fall migration. Overwintering habitat for walleye includes areas with adequate depth to avoid freezing, adequate dissolved oxygen levels and no strong currents. Walleye actively feed during the winter. Downstream movements of walleye out of the aquatic study area occur throughout the spring, summer and fall, with a portion of the population overwintering in downstream areas. However, some fish remain to overwinter in the Athabasca River. Sites in the Athabasca River used by overwintering walleye were characterized by shallow water depths, slow velocities and fine substrates."
https://open.alberta.ca/dataset/ea88...ppendix-17.pdf