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Table 2 Entrainment and free-running parameters of D. helvetica strains in the laboratory

From: Effects of altitude on circadian rhythm of adult locomotor activity in Himalayan strains of Drosophila helvetica

Strain Ψo Ψe α/ρ in LD 12:12 TAPC in LD 12:12 α/ρ in DD τ (h) TAPC in DD
haH 4.5 (0.4) - 1.1 (0.3) 0.7 (0.3) 596 (32) 0.4 (0.2) 26.1 (0.6) 592 (59)
laH -1.3 (0.4) 0.4 (0.2) 1.7 (0.4) 782 (61) 0.4 (0.1) 21.7 (0.4) 377 (32)
  1. Mean values (± SD, N = 21) for the phase of activity onset (Ψo), phase of activity end (Ψe), the ratio of activity phase to rest phase (α/ρ) and the total activity per cycle (TAPC) for males of the haH strain and the laH strain of D. helvetica entrained by LD 12:12 cycles at constant temperature of 20 ± 0.5°C in the laboratory.