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- W1987447371 abstract "The electric organ discharge of Brachyhypopomus pinnicaudatus was studied by recording (1) the discharge field potentials in water at different conductivities and temperatures and (2) the spatiotemporal pattern of electromotive forces of the equivalent source. An early deflection, head positive (P wave), and a late deflection, head negative (N wave), are the major components of the discharge, however a striking double positive peak is generated at the abdominal level. Comparisons of this species with other pulse gymnotids provide evidence for common patterns of organization of the electrogenic system: (1) There is a head-to-tail activation wave along the fish; (2) the electromotive force increases exponentially from head to tail, but it is differentially attenuated by the passive tissues in male and females; (3) the abdominal region generates a complex species-specific waveform, whereas the tail discharge is similar across species. In B. pinnicaudatus the electric organ discharge waveform is sensitive to endocrine and environmental stimuli. The effect of seasonal sex differences on electrogenic and passive tissue, the changes in impedance matching between the fish's body and the environment, and the modulation of membrane properties by temperature, are able to modify the EOD waveform. Since these factors change during the breeding season, their appropriate combination might be crucial for reproduction." @default.
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- W1987447371 date "1998-01-01" @default.
- W1987447371 modified "2023-09-27" @default.
- W1987447371 title "The Electric Organ Discharge of <i>Brachyhypopomus pinnicaudatus</i>" @default.
- W1987447371 cites W2029640164 @default.
- W1987447371 doi "https://doi.org/10.1159/000006559" @default.
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