Segment-specific per cent survival probabilities ± standard error derived from the model with the lowest QAICc that included year (φ(segment × SkokH + year + rd), p(segment + RM:line + rd)).

This model grouped wild Big Beef Creek and Skokomish River smolts as having different survival probabilities than Skokomish Hatchery smolts. Numbers of fish detected at the end of each segment are reported in parentheses.aPR = Point of Release.bRM = River Mouth.cHCB = Hood Canal Bridge Line.dADM = Admiralty Inlet Line.eJDF = Strait of Juan de Fuca Line.fcalculated using upper and lower 95% confidence limit detection probability estimates for the fixed JDF value in the model [31] (see methods section).