Jaw-tagged 7- to 10-inch brook trout and brown trout were placed in two Minnesota streams to determine their survival. A creel census conducted on Duschee Creek showed that trout were returned at the rate of 1.49 and 1.55 fish per hour in succeeding seasons. Brown trout planted in this stream in the fall and spring yielded returns of 21.7 per cent and 28.0 per cent respectively, but no brook trout and only 2.0 per cent of the brown trout planted in summer were caught the following year. Planted trout contributed 8.8 per cent and 22.7 per cent of the total catch in successive seasons.