Train signals for electric fish
Article Abstract:
Electric fish, Eigenmannia viriscens uses electric organs to produce an oscillating electric organ discharge (EOD), which helps in perceiving the environment. The EOD activates electroreceptors on the fish skin which project to the pyramidal cells in the electrosensory lateral-line lobe. Neurons in the electrosensory lateral-line lobe encode temporal features or vectors. Higher centres in the brain, controlling communication and locomotion, interpret these temporal features. The pyramidal cells may discharge in the form of individual spikes or bursts of spikes.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Predation enhances complexity in the evolution of electric fish signals
Article Abstract:
Predation pressure on neotropical weakly electric fish (Gymnotiformes) appears to have selected for greater signal complexity. Biphasic signals in the predatory electric eel were found to be less detectable than primitive monophasic signals, using playback trials. In the family Hypopomidae sexually mature males of several species extend the duration of the second stage of electric signal pulses, further amplifying the sexual dimorphism.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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From stimulus encoding to feature extraction in weakly electric fish
Article Abstract:
Sensory neurons in weakly electric fish are responsible for accurate collection of information without any processing, and subsequent stage performs a nonlinear pattern-recognition and extracts the behaviorally important features. Pyramidal cells in the electrosensory lateral-line lobe, fail to convey information of the time course of stimuli. Short bursts of spikes signals the presence of temporal features.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
User Contributions:
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