Figure 3. Relative proportion of one-year-old individuals in Lake Skrukkebukta (blue) and Lake Vaggatem (green) perch populations on a natural logarithmic scale related to the preceding summer water temperature (°C). Relative proportion of one-year-old perch is calculated as the proportion of one-year-old individuals relative to the total CPUE (100m2/12h)-1 in the littoral zone of the two lakes.