Aequidens rivulatus (a schooling, sexually dimorphic, substratebreeding
cichlid from Ecuador and Peru; Stawikowski & Werner
1998) were bred at our laboratory. These fish, like most cichlids,
show elaborate display behaviour during agonistic and sexual
interactions and are the subjects of a long-term study of behavioural
lateralization in our department. Fish were reared in large
stock aquaria (100 50 cm and 50 cm high), of which the back and
sides were covered with black plastic, and fed dry fish flakes daily
(TetraMin Tropical Fish Flakes).