Table 1

Entrainment parameters of D. helvetica strains in the field

Strain
Ψo (h)
Ψe (h)
ΨM-E (h)
α/ρ
TAPC

haH at NFT
5.2 (0.4)
- 1.4 (0.5)

0.4 (0.1)
310 (8)
haH at CT
5.2 (0.3)
1.1 (0.4)

0.7 (0.2)
601 (76)
laH at NFT
- 1.2 (0.3)
0.4 (0.3)
5.6 (0.4)
1.7 (0.4)
501 (49)
laH at CT
- 1.1 (0.3)
0.4 (0.2)
2.4 (0.4)
1.7 (0.4)
813 (39)

Mean values (± SD, N = 21) for the phase of activity onset (Ψo), phase of activity end (Ψe), the interval between morning and evening peaks (ΨM-E), 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 natural LD 14.1:9.9 cycles in the naturally fluctuating temperature (NFT) regime and in constant temperature (CT) regime (20 ± 0.5°C) at the altitude of origin in the field.

Vanlalhriatpuia et al. Journal of Circadian Rhythms 2007 5:1   doi:10.1186/1740-3391-5-1