Table 1.
Trials conducted under experimental conditions in the laboratory.
| Experiment No. | Limpets (n) | Duration (hr) | Time from collection | Light | Spray | Period (τ) |
|---|---|---|---|---|---|---|
| 1 | 5 | 147.5 | DFS | DD | Constant | 12.1 ± 1.1 (n = 5) |
| 2 | 10 | 72 | DFS | LD | Constant | 12.16 ± 0.45 (n = 4) 8.07 ± 0.30 (n = 5) arrhythmic (n = 1) |
| 10 | 85 | LD | Tide | 12.09 ± 0.44 (n = 9) | ||
| arrhythmic (n = 1) | ||||||
| 10 | 82 | LD | Constant | NA | ||
| 3 | 5 | 69.5 | DFS | LL | Constant | 12.88 ± 1.45 (n = 5) |
| 5 | 66.5 | LL | Tide | 12.75 ± 0.91 (n = 5) | ||
| 5 | 98 | LL | Constant | 12.36 ± 1.2 (n = 5) | ||
| 4 | 20 | 76 | 2WL | DD | Constant | 11.8 ± 0.45 (n = 5) |
| arrhythmic (n = 15) | ||||||
| 19 | 71.5 | DD | Tide | 12.25 ± 0.40 (n = 14) arrhythmic (n = 5) | ||
| 13 | 73 | DD | Constant | 12.26 ± 0.54 (n = 9) arrhythmic (n = 4) |
Time from collection – DFS – direct from sea, 2WL – two weeks in lab under constant conditions before experiment; Spray – Constant – no tidal cue, Tide – spray timed to entrain; Period (τ) of locomotor movement calculated by Lomb-Scargle periodogram (Refinetti, 2007) presented as average ± S.D. Trial 2 entrainment (constant phase) missing.