Figure 3.

Evolved changes in heat shock reaction norm in evolved lines of C. remanei occur by shifting the reaction norm. Shown are predicted reaction norms across a range of heat shock temperatures for a representative of each selection line raised at either 20° (blue) or 30° (red). Points represent the proportion of worms surviving in replicate trials, and solid lines indicate the predicted probability of survival from a logistic regression with 95% confidence intervals. The gray box indicates the temperature range included in the 36.8° heat shock assays, where plasticity was initially measured.