Movements of northern pike (Esox lucius) in Lac Ste. Anne, Alberta were monitored for5 to 47 days using ultrasonic transmitters which were implanted in the fishes' stomachs. None ofthe nine fish studied established well-defined home ranges. The pike were usually found within300 m of shore and in water less than 4 m deep. No major differences were found in the extent ofmovement or in habitat selection between summer and winter. Daily pike movements were from 0to 4,000 m, but most daily movements were less than 1,000 m.