The effects of pargyline, scopolamine, and imipramine on territorial aggression in the convict cichlid (Cichlasoma nigrofasciatum).

Scopolamine, pargyline, and imipramine reduce territorial aggression in the convict cichlid. Imipramine is effective at much lower doses than either scopolamine or pargyline. None of the drugs affected activity or predation/feeding, indicating that the observed drug effects are relatively specific.