- 18 - that survival, at least to the salt water stage, was not adversely affected by rearing the fry and fingerlings in five per cent effluent water. The failure of more than one salmon of this experiment to return "home" in the fall of 1953 was disappointing and unexpected, hence survival to maturity and possible genetic effects cannot be evaluated. Number of Chinook Salmon Recaptured from 12,410 LV and 13,174 RV Marked Fry Released July 1, 1950, from the University of Washington Year No. Recaptured Size in Area LV RV 1950 0 0 1951 Ll 15 1-5 1952 29 54 2~11 " 57* 44 6-18 1/2 Ocean 7 30 oO 1 1953 Remarks Pounds 8 1/2-34 Puget Sound Sportsfishermen " Sportsfishermen Commercial Puget Sound Sportsand Ocean fishermen U of W Trap Total 47 to - 104 144 *Caught off the coast of Washington; may be from Kalama, Samish or University of Washington since a similar mark was used for all three.