Fig. 3

Previously published temperature analyses A found that male mice (red lines—thick line is mean) show higher amplitude changes in ultradian rhythms (as determined by wavelet-based frequency band isolation—see “Methods” section) across time than females (blue). Here females are aligned by their 4-day estrous cycles (“E” marks days of estrus). Building on these analyses, males also have a higher median ultradian power, and inter-individual range of medians (B), than do females. Consistent with this finding, wavelet-based isolation of circadian modulation of ultradian power shown in A (C) reveals that males have greater circadian modulation of ultradian rhythms than do females. In addition to having higher median power D, males also show greater inter-individual variance than do females for both median ranges. *Indicates significant difference. See “Results” section for further details