Heatmap displaying the percentage of male and female lake whitefish during the day and night present in each grid cell (10 m × 10 m) in the study area during the escalation (15 males, 7 females; 2–24 November 2021), peak activity (15 males, 7 females; 25 November–1 December 2021), and de-escalation (15 males, 5 females; 2–19 December 2021) stages. The number of positions for each sex for the day and night were 10,003 and 19,032 for males and 6191 and 11,796 for females for the escalation stage, 2978 and 3064 for males and 1763 and 2705 for females for the peak activity stage, and 7225 and 9863 for males and 2265 and 4989 for females for the de-escalation stage, respectively.