...Jacquelyn M. Petzold; José A. Alves-Gomes; G. Troy Smith ABSTRACT Electrosensory systems of weakly electric fish must accommodate competing demands of sensing the environment (electrolocation) and receiving social information (electrocommunication). The jamming avoidance response (JAR...

... isolated. We injected fish with BrdU 2.5 h before sacrifice to label newborn cells. We examined the hindbrain and midbrain and quantified the density of BrdU+ cells in whole transverse sections, proliferative zones and two brain nuclei in the electrocommunication circuitry (the pacemaker nucleus...

...K. D. Dunlap; B. T. DiBenedictis; S. R. Banever SUMMARY Brown ghost knife fish ( Apteronotus leptorhynchus ) can briefly increase their electric organ discharge (EOD) frequency to produce electrocommunication signals termed chirps. The chirp rate increases when fish are presented with conspecific...

... electric organ discharge sexual selection sensory exploitation sensory bias playback stimulation electrocommunication handicap predation pressure Weakly electric fish generate electric organ discharges (EODs) for nocturnal electrolocation and electrocommunication (for reviews, see Kramer...

... periods of low aggression,whereas AFRs tend to be produced when the fish are aggressively attacking one another in close proximity. This study is the first to our knowledge that quantitatively describes both electrocommunication signalling and behavioural correlates on a subsecond time-scale in a wave...

... courtship reproduction electrocommunication electric organ discharge The weakly electric fish from Africa in the family Mormyridae, use their electric sense for communication and navigation( Hopkins, 1986b ) (for reviews,see Kramer, 1990 ; Ladich et al., 2006 ; Moller, 1995 ; von der Emde...

... components generated by the abdominal region prevail in self-generated fields. Similar results were obtained from Brachyhypopomus pinnicaudatus . These results suggest that, in pulse-emitting gymnotids, electrolocation and electrocommunication signals may be carried by different field components generated...

... of strongly acoustic fish in Africa: Pollimyrus isidori , Mormyridae . Behaviour 134 , 677 – 725 . Dunlap , K. D. , McAnelly , M. L. and Zakon , H. H. ( 1997 ). Estrogen modifies an electrocommunication signal by altering the electrocyte sodium current in an electric fish...

... of some higher functions in the cerebellum and forebrain will gradually come to light. * e-mail: [email protected] 02 03 1999 21 04 1999 © 1999 by Company of Biologists 1999 electroreception electrocommunication brain organisation complexity cognition Even...