Fig. 1
From: Effect of temperature cycles on the sleep-like state in Hydra vulgaris
The sleep-like state under cold temperature. A Daily sleep profiles under 10 °C (Blue line) and 20 °C (Red line) represent mean ± SEM (n = 56–95). Box plots represent B sleep amount in day and night (n = 56–95), C Total sleep amount (n = 56–95), D Total number of sleep bouts (n = 56–95), E Averaged sleep bout length (ABL) (n = 56–95), and F L latency (n = 56–95). G Percentage of Hydra awakened by stimulation under 10 °C and 20 °C conditions. Stimulation was 1400 lx. Represent mean ± SEM (n = 5). *P < 0.05, ***P < 0.001, by Kruskal–Wallis test followed by Mann–Whitney U test with Bonferroni correction [B-D], Mann–Whitney U test [E], and Fisher’s exact test [G]. LD12:12, 12-h/12-h light–dark