Schluessel, V Visual discrimination and object categorization in the cichlid Pseudotropheus sp. [electronic resource] - Animal cognition Jul 2012 - 525-37 p. digital Publication Type: Journal Article ISSN: 1435-9456 Standard No.: 10.1007/s10071-012-0480-3 doi Subjects--Topical Terms: AnimalsCichlids--physiologyConcept FormationDiscrimination LearningDiscrimination, PsychologicalForm PerceptionPhotic StimulationSize Perception