Table 2. Results of linear models exploring the main effects of season, lake, and the season-lake interaction on total brain mass and the volumes of individual regions (telencephalon, cerebellum, optic tectum, olfactory bulb, and hypothalamus). Changes in brain mass were first explored across all 6 continuous seasons (i.e., fall, winter, spring, summer, fall, winter) before combining data into 4 seasons (i.e., fall, winter, spring, summer) for subsequent comparisons of brain mass and regional volumes.