Table 2. GAMM results showing effects of time of day, tides or lunar cycle on body temperature, acceleration and swimming depth (from telemetry), and ODBA and gastric motility (from data-loggers).
| Model and terms x | n | Smoother | Degrees of freedom | F-statistic | P | r 2 |
|---|---|---|---|---|---|---|
| Body temperature (telemetry) | 4 | 0.09 | ||||
| s(Hour) | cyclic | 7.15 | 32.14 | <0.001 | ||
| Gastric motility (data-logger) | 1 | 0.05 | ||||
| s(Hour) | cyclic | 6.20 | 18.82 | <0.001 | ||
| Acceleration (telemetry) | 6 | 0.13 | ||||
| s(Hour) | cyclic | 4.45 | 13.97 | <0.001 | ||
| s(Lunar fraction illuminated) | cyclic | 5.00 | 7.83 | <0.001 | ||
| factor(Month) | — | — | — | <0.001 | ||
| Depth (telemetry) | 6 | 0.16 | ||||
| s(Hour) | cyclic | 7.65 | 42.39 | <0.001 | ||
| ln ODBA (data-logger) | 4 | 0.08 | ||||
| s(Time of Day*) | cyclic | 6.80 | 25.45 | <0.001 | ||
| s(Tide) | cubic | 6.86 | 18.14 | <0.001 | ||
| s(Ambient Temperature) | cubic | 5.57 | 5.57 | <0.001 | ||
| s(Depth) | cubic | 6.30 | 6.30 | <0.001 |
Only significant effects are shown for models with the lowest AIC and BIC values. Models differed by > 2 AIC units from the next possible model to be selected. Results are for all individuals combined.