Table 1.
Parameters of behavioral rhythms in different photoperiods
| Lighting (on–off) | Activity band, h |
ψ, h |
|||
|---|---|---|---|---|---|
| Activity time | Onset | End | ψonset | ψend | |
| LD12:12 (0600–1800) | 12.61 ± 0.77 | 18.16 ± 0.58 | 6.77 ± 0.34 | −0.16 ± 0.58 | −0.77 ± 0.34 |
| LD18:6 (0300–2100) | 7.35 ± 0.66** | 21.38 ± 0.34** | 4.73 ± 0.44** | −0.38 ± 0.34 | −1.73 ± 0.44** |
| LD12:12 (0600–1800) | 12.10 ± 0.47 | 18.19 ± 0.22 | 6.29 ± 0.48 | −0.19 ± 0.22 | −0.29 ± 0.48 |
| LD6:18 (0900–1500) | 13.59 ± 0.86** | 16.18 ± 0.60** | 5.76 ± 1.28 | −1.18 ± 0.60** | 3.24 ± 1.28** |
Phase angle differences (ψ) were calculated between the activity onset and light off (ψonset) and between the end of activity and light on (ψend). Paired Student's t test was used for comparing values of two different photoperiods. Values are mean ± SD (n = 9). **, P < 0.01 vs. respective LD12:12.