Aggression and courtship in male blue gouramis. Males in the PAV treatment had learned that a light cue preceded interactions with a female, while males in the UNP group had not learned to associate these stimuli.
Then PAV and UNP males were given access to a female subsequent to exposure to the light cue.
PAV males displayed (A) less aggression and (B) more courtship-related behaviors than their UNP counterparts.