Figure 3. Seasonal variation in relative brain region size in lake trout. The curves show estimated marginal means and 95% confidence intervals (shaded ribbons) of telencephalon (a), cerebellum (b), optic tectum (c), olfactory bulbs (d), and hypothalamus (e) volumes corrected for fork length in trout of Lake of Two Rivers (red, solid line) and Lake Opeongo (blue, dashed line). Different letters denote significant seasonal differences (P < 0.05) obtained by Tukey’s test of models combining two fall and winter sampling seasons.