...Camille Mirmiran; Maia Fraser; Leonard Maler ABSTRACT We analyzed the trajectories of freely foraging Gymnotus sp., a pulse-type gymnotiform weakly electric fish, swimming in a dark arena. For each fish, we compared the its initial behavior as it learned the relative location of landmarks and food...

... and with others. Overlapping communication functions create challenges for signal privacy and fidelity by leaving active-sensing animals vulnerable to eavesdropping, jamming and masking. Here, we present an overview of active-sensing systems used by weakly electric fish, bats and odontocetes, and consider...

... assessment, where electrocommunication with so-called ‘rises’ could signal a loser's motivation to continue assessment through ritualized fighting. Staged competition Resource holding potential Assessment Communication Weakly electric fish Deutsche Forschungsgemeinschaft http://dx.doi.org...

...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...

.... Sensory systems must balance rapid detection of a stimulus with perception of fine details that enable discrimination between similar stimuli. Here, we show that in a species of weakly electric fish, Apteronotus leptorhynchus , two coding strategies are employed for these separate behavioral tasks. Using...

...Martin Worm; Frank Kirschbaum; Gerhard von der Emde ABSTRACT Mormyrid weakly electric fish have a special electrosensory modality that allows them to actively sense their environment and to communicate with conspecifics by emitting sequences of electric signals. Electroreception is mediated...

... 31 7 2014 © 2014. Published by The Company of Biologists Ltd 2014 Weakly electric fish Voluntary movement Active sensing Decision making Readiness potential Volition Volition is generally considered as a defining human faculty; but the outcome of a voluntary decision can...

... process them, thereby optimizing their perception by the organism. Here we examined whether gymnotiform weakly electric fish displayed behavioral responses that are adapted to the statistics of the natural electrosensory envelopes. Previous studies have shown that the envelopes resulting from movement...

... is essential to understanding how brains process sensory stimuli. Mormyrid weakly electric fishes are experts at time coding, making them an exemplary organism for addressing this question. Mormyrids generate brief, stereotyped electric pulses. Pulse waveform carries information about sender identity...

... of research on electrocyte physiology in weakly electric fish, as well as recent discoveries of key phenomena not anticipated during early work in this field. Recent areas of investigation include the regulation of electrocyte activity by steroid and peptide hormones, the molecular evolution of electrocyte...

... in the weakly electric fish Apteronotus leptorhynchus . Specifically, our review focuses on how experimental application of these neuromodulators alters excitability and responses to sensory input of pyramidal cells within the hindbrain electrosensory lateral line lobe. We then discuss current hypotheses...

... a population code, in which duration is reflected in the population of responding knollenorgans. * Author for correspondence ( [email protected] ) 22 11 2011 24 3 2012 © 2012. 2012 mormyrid weakly electric fish duration tuning electroreception temporal coding peripheral...

...Miyoung Sim; DaeEun Kim SUMMARY Weakly electric fish generate an electric field with their electric organ to navigate in space, detect objects and communicate with conspecifics. Several studies have examined how electric fish identify objects with their electroreceptors and use electric images...

... E. , Chacron M. ( 2009 ). Effects of restraint and immobilization on electrosensory behaviors of weakly electric fish . ILAR J. 50 , 361 - 372 . Jeka J. , Kiemel T. , Creath R. , Horak F. , Peterka R. ( 2004 ). Controlling human upright posture: velocity...

...V. Fugère; R. Krahe SUMMARY Gymnotiformes are South American weakly electric fish that produce weak electric organ discharges (EOD) for orientation, foraging and communication purposes. It has been shown that EOD properties vary widely across species and could thus be used as species recognition...

...Ginette J. Hupé; John E. Lewis SUMMARY Brown ghost knifefish, Apteronotus leptorhynchus , are a species of weakly electric fish that produce a continuous electric organ discharge (EOD)that is used in navigation, prey capture and communication. Stereotyped modulations of EOD frequency and amplitude...

... and provide a cancellation mechanism remains unclear. In the present study, we investigated the influence of parallel fiber feedback onto pyramidal neurons of the electrosensory lateral line lobe (ELL) in weakly electric fish under open loop conditions. We mimicked naturalistic parallel fiber inputs in an ELL...

...Stefan Schuster SUMMARY Gymnotiform weakly electric fish find their way in the dark using a continuously operating active sensory system. An electric organ generates a continuous train of discharges (electric organ discharges, EODs), and tuberous high-frequency electroreceptors monitor the pattern...

...Joseph Bastian; Stephanie Schniederjan; Jerry Nguyenkim SUMMARY South American weakly electric fish produce a variety of electric organ discharge (EOD) amplitude and frequency modulations including chirps or rapid increases in EOD frequency that function as agonistic and courtship and mating...

...Stefan Schuster ABSTRACT Weakly electric fish of the pulse type electrolocate objects in the dark by emitting discrete electric organ discharges (EODs) separated by intervals of silence. Two neighbouring pulse-type fish often reduce the risk of discharging simultaneously by means of an ‘echo...