Figure 3

Phenotypic variation in age-specific size in damselfly larvae measured at the age of 42, 84 and 126 days at three temperatures. Box plots show the size distribution for each combination of species, latitudinal population, time and temperature. Lines depict the second-order polynomial basis functions that were fitted to these data. See Supplementary Table S2 for statistical tests. Note the generally higher elevation of TRNs in central species, the steep slope of TRNs in C. johanssoni and the flat slopes of TRNs in southern species. The latitudinal position of each population is shown in the upper left corner of each panel.