Figure 5From: Effects of altitude on circadian rhythm of adult locomotor activity in Himalayan strains of Drosophila helvetica Mean entrainment activity profile shown in histogram format for 21 males of each strain for 11 days in LD 12:12 cycles at 20 ± 0.5°C under controlled laboratory conditions. Males of the haH strain had a unimodal activity pattern in which activity onset occurred in the subjective forenoon, ~4.5 h after lights-on (A). Males of the laH strain had a bimodal activity pattern in which activity onset occurred ~1 h before lights-on (B). The other notations are the same as used in Figure 1.Back to article page