Table 6 Ethogram of behaviours recorded during the dyadic contests
Behaviour | Measure | Description |
|---|---|---|
Nose contact | Latency | Nose approaches within 5Â cm of the snout of the opponent |
Display | Latency | Parallel walking (move simultaneously with the shoulders next to each other); heads up (both have their nose lifted high up in the air alongside each other); or shoulder-to-shoulder (standing or moving with the shoulder against the shoulder of the opponent without real pressure) |
Mutual pushing | Latency | Head or shoulder is used to move the opponent aside by applying pressure |
Unilateral bite | Latency | Opens mouth and delivers a bite that contacts the opponent |
Fight | Latency | Rapid sequence of bites which are retaliated with a similar aggressive act from the opponent within 5Â s |
Withdrawal | Latency | Turns its head away from the opponent and retreats from further attacks by not showing any aggressive behaviour within 10Â s |
Foaming | Yes/no | Froth appears from the mouth due to repeated teeth grinding |
Piloerection | Yes/no | Hairs in the neck are raised as compared to their normal flat position |