Table 1 Description of the aggressive behaviours quantified. An aggression score was calculated as the average frequency of these displays
Behaviour | Description | |
|---|---|---|
| Frontal display | Faces the opponent with unpaired fins and/or opercula extended. Body in an angle between 45 to 90 degrees to the opponent. |
| Lateral display | Exposes the flank to the opponent with unpaired fins and/or opercula distended. Body in an angle of less than 45 degrees to the opponent. |
| Charge | Swims fast in the direction of the opponent. |
| Caudal swing (tail beats) | Waves the caudal fin towards the opponent side. |
