Table 4. Comparison of male long-term behavioural responses between playback treatments (Wilcoxon matched-pair signed rank tests, N = 12 playback trials, with a total of n = 156 scan sampling observations, i.e. 13 scans per individual for 1 h).
| Variables** | Duet song playback | Predator song playback | V | P value | |
|---|---|---|---|---|---|
| Behavioural activity | Grooming | 1.0 ± 1.6 | 1.7 ± 2.0 | 5.5 | 0.688 |
| Moving | 2.0 ± 1.3 | 1.7 ± 1.5 | 13.5 | 0.594 | |
| Resting | 0.8 ± 0.8 | 0 ± 0 | 10 | 0.125 | |
| Feeding | 4.0 ± 1.4 | 0.3 ± 0.8 | 21 | <0.05* | |
| Vigilance | 2.2 ± 1.3 | 9.0 ± 2.0 | 0 | <0.05* | |
| Body position | Hanging | 7.2 ± 2.5 | 5.0 ± 1.7 | 3.5 | 0.188 |
| Sitting/lying | 5.8 ± 2.5 | 8.0 ± 1.7 | 17.5 | 0.188 | |
| Gaze direction | Speaker | 3.0 ± 1.7 | 4.5 ± 1.1 | 2 | 0.125 |
| Canopy | 8.7 ± 1.2 | 3.2 ± 2.5 | 21 | <0.05* | |
| Ground | 0 ± 0 | 5.0 ± 1.3 | 0 | <0.05* | |
| Group member | 1.3 ± 1.5 | 0.3 ± 0.8 | 8.5 | 0.375 | |
| Elevation (m) | 17.6 ± 6.2 | 25.1 ± 7.1 | 3 | 0.156 | |
| Proximity to mate (m) | 8.9 ± 7.3 | 10.3 ± 7.7 | 7 | 0.563 | |
| Dropping branch† | 0 ± 0 | 0.5 ± 0.8 | 0 | 0.5 | |
| Defaecation/Urination† | 0.3 ± 0.5 | 3.2 ± 1.2 | 0 | <0.05* | |
Notes:
†
All occurrence behaviours recorded over 2 h post trial.
*
P < 0.05.
**
Means ± SD.