Survival probability with length of yearling Chinook for each year, tag type and reach. Survival of acoustic-tagged (AT) and PIT-tagged (PIT) yearling Chinook salmon from release at Lower Granite Dam to Lower Monumental Dam, Ice Harbor Dam, McNary Dam, and John Day Dam by year. Dot size represents the weight of each length-class point estimate. Results are plotted at the mean value of the length range (that is, bin). Results are based on weighted linear regression and P values are from weighted analysis of variance. Asterisks indicate a significant difference (α = 0.05). AT: acoustic transmitter; Int.: interaction; Len.: length; PIT: passive integrated transponder; Tag: tag type.