title: Active electroreception in Gymnotus omari: imaging, object discrimination, and early processing of actively generated signals.
abstract: Weakly electric fishes "electrically illuminate" the environment in two forms: pulse fishes emit a succession of discrete electric discharges while wave fishes emit a continuous wave. These strategies are present in both taxonomic groups of weakly electric fishes, mormyrids and gymnotids. As a consequence one can distinguish four major types of active electrosensory strategies evolving in parallel. Pulse gymnotids have an electrolocating strategy common with pulse mormyrids, but brains of pulse and wave gymnotids are alike. The beating strategy associated to other differences in the electrogenic system and electrosensory responses suggests that similar hardware might work in a different mode for processing actively generated electrosensory images. In this review we summarize our findings in pulse gymnotids' active electroreception and outline a primary agenda for the next research.
authors.affiliation: Departamento de Neurociencias Integrativas y Computacionales, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo CP 11600, Uruguay. angel@iibce.edu.uy
authors.forename: Angel A
authors.initials: AA
authors.lastname: Caputi
authors.forename: María E
authors.initials: ME
authors.lastname: Castelló
authors.forename: Pedro A
authors.initials: PA
authors.lastname: Aguilera
authors.forename: Carolina
authors.initials: C
authors.lastname: Pereira
authors.forename: Javier
authors.initials: J
authors.lastname: Nogueira
authors.forename: Alejo
authors.initials: A
authors.lastname: Rodríguez-Cattaneo
authors.forename: Carolina
authors.initials: C
authors.lastname: Lezcano
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D004557:Electric Organ / Q000294:innervation* / Q000502:physiology*; D023702:Gymnotiformes / Q000033:anatomy & histology* / Q000502:physiology*; D008954:Models, Biological; D009434:Neural Pathways / Q000033:anatomy & histology / Q000502:physiology; D011984:Sensory Receptor Cells / Q000502:physiology*