Model comparisons for juvenile mass.

Results for models describing variation in juvenile fish mass (g) after initial marine residence for Snake River spring/summer Chinook salmon based on ocean conditions during juvenile emigration. CCI6 =  Copepod Community Index in June; PlArea4_7 =  mean plume area from April to July; NPGO4_6 =  mean value from April to June; PDO7_9 =  mean value from July to September, RSS =  residual sum of squares, AICc  =  Akaike Information Criteria adjusted for small sample size. represents the difference between the AICc of the best model and the others. indicates the relative likelihood of the model given the data. Variables were transformed (logarithm or square root) to normalize distributions and homogenize variances.