Kaunzinger, Ivo and Kramer, Bernd (1996) Electrosensory phase sensitivity in the weakly electric fish Eigenmannia in the detection of signals similar to its own. JOURNAL OF COMPARATIVE PHYSIOLOGY A-NEUROETHOLOGY SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY, 179 (3). pp. 323-330. ISSN 0340-7594, 1432-1351
Full text not available from this repository.Abstract
The electric organ discharge (EOD) of the South American knifefish Eigenmannia sp. is a permanently present wave signal of usually constant amplitude and frequency (similar to a sine wave). A fish perceives discharges of other fish as a modulation of its own. At frequency identity (Delta F = 0 Hz) the phase difference between a fish's own electric discharge and that of another fish affects the superimposed waveform. It was unclear whether or not the electrosensory stimulus-intensity threshold as behaviourally determined depends on the phase difference between a fish's own EOD and a sine-wave stimulus (at Delta F = 0 Hz). Also the strength of the jamming avoidance response (JAR), a discharge frequency shift away from a stimulus that is sufficiently close to the EOD frequency, as a function of phase difference was studied. Sine-wave stimuli were both frequency-clamped and phase-locked to a fish's discharge frequency (Delta F = 0 Hz). In food-rewarded fish, the electrosensory stimulus-intensity threshold depended significantly on the phase difference between a fish's discharge and the stimulus. Stimulus-intensity thresholds were low (down to 3 mu V/cm, peak-to-peak) when the superimposed complex wave changed such that the shift in zero-crossings times relative to the original EOD was large but amplitude change minimal; stimulus-intensity thresholds were high (up to 16.9 mu V/cm, peak-to-peak) when the shift in zero-crossings times was small but amplitude change maximal. Similar results were obtained for the non-conditioned JAR: at constant supra-threshold stimulus intensities and Delta F = 0 Hz, the phase difference significantly affected the strength of the JAR, although variability between individuals was higher than that observed in the conditioned experiments.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | JAMMING AVOIDANCE-RESPONSE; TIME-COMPARISON CIRCUIT; GYMNOTIFORMES; FREQUENCY; ELECTRORECEPTORS; DISCRIMINATION; COMMUNICATION; MORPHOLOGY; MIDBRAIN; BEHAVIOR; electric organ discharge; signal detection; phase sensitivity; electrosensory stimulus-intensity threshold; jamming avoidance response |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Alumni or Retired > Verhaltensbiologie und Verhaltensphysiologie (Prof. Dr. Bernd Kramer) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Jun 2023 05:49 |
| Last Modified: | 29 Jun 2023 05:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51507 |
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