Filename: Gvozdik_Smolinsky_CTRL.txt Maximum swimming velocities of newt larvae in the control group (without predator). Trial no. = trial number; U10 = maximum swimming velocity at 10°C (cm s-1); U20 = maximum swimming velocity at 20°C (cm s-1); TL = total length (cm); b = before trial; a = after trial. Note that line values before and after trial may refer to different individuals. Filename: Gvozdik_Smolinsky_Predator.txt Maximum swimming velocities of newt larvae in the predation group (with predator). Trial no. = trial number; U10 = maximum swimming velocity at 10°C (cm s-1); U20 = maximum swimming velocity at 20°C (cm s-1); TL = total length (cm); b = before trial; a = after trial. Note that line values before and after trial may refer to different individuals. Filename: Gvozdik_Smolinsky_Repeatability.txt Group (trial) means of measured variables used for the calculation of group repeatabilities. Trial no. = trial number; Umax = mean maximum swimming velocity across 10 – 20°C range(cm s-1); Q10 = thermal sensitivity of Umax; Urel = size-corrected Umax (cm s-1); TL = total length (cm); b = before trial; a = after trial. Filename: Gvozdik_Smolinsky_Differentials.txt Selection differentials for measured variables in predation and control groups. Trial no. = trial number; MeanT = mean water temperature during a trial (°C); RangeT = difference between maximum and minimum water temperature during a trial (°C); Light = mean light intensity at water surface during a trial (lx); TL_predator = total length of predator; S = linear selection differential; C = univariate or bivariate nonlinear selection differential; Umax = mean maximum swimming velocity across 10 – 20°C range(cm s-1); Q10 = thermal sensitivity of Umax; Urel = size-corrected Umax (cm s-1); TL = total length (cm); c = control group; p = predation group.