agonistic behavior Animals 4 Cichlids 4 Male 4 adult 4 aggression 4 animal 4 cichlid 4 female 4 male 4 nonhuman 4 Aggression 2 Aggressive behaviour 2 Agonistic Behavior 2 Androgens 2 Animalia 2 Aromatase 2 Article 2 Brain 2 Cichlasoma 2 Cichlasoma dimerus 2 Cichlidae 2 Contest 2 Cyp19a1b gene 2 Dominance-Subordination 2 Female 2 Fish 2 Gene Expression 2 Intra-species interaction 2 Mammalia 2