NDLI: Plasticity of the electric organ discharge waveform of the electric fish Brachyhypopomus pinnicaudatus I. Quantification of day-night changes

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Plasticity of the electric organ discharge waveform of the electric fish Brachyhypopomus pinnicaudatus I. Quantification of day-night changes

Journal of Comparative Physiology A : Volume 183, Issue 5, November 1998

Journal of Comparative Physiology A : Volume 183, Issue 4, October 1998

Journal of Comparative Physiology A : Volume 183, Issue 3, September 1998

Journal of Comparative Physiology A : Volume 183, Issue 2, July 1998

Journal of Comparative Physiology A : Volume 183, Issue 1, June 1998

Journal of Comparative Physiology A : Volume 182

Journal of Comparative Physiology A : Volume 181

Journal of Comparative Physiology A : Volume 180

Plasticity of the electric organ discharge waveform of the electric fish Brachyhypopomus pinnicaudatus I. Quantification of day-night changes

Content Provider	Springer Nature Link
Author	Franchina, C. R. Stoddard, P. K.
Copyright Year	1998
Abstract	The electric organ discharge of the gymnotiform fish Brachyhypopomus pinnicaudatus is a biphasic waveform. The female's electric organ discharge is nearly symmetric but males produce a longer second phase than first phase. In this study, infrared-sensitive video cameras monitored the position of unrestrained fish, facilitating precise measurement of electric organ discharge duration and amplitude every 2 h for 24 h. Males (n=27) increased electric organ discharge duration by 37 ± 12% and amplitude by 24 ± 9% at night and decreased it during the day. In contrast, females (n=8) exhibited only minor electric organ discharge variation over time. Most of a male's increase occurred rapidly within the first 2–3 h of darkness. Electric organ discharge values gradually diminished during the second half of the dark period and into the next morning. Modulation of the second phase of the biphasic electric organ discharge produced most of the duration change in males, but both phases changed amplitude by similar amounts. Turning the lights off at mid-day triggered an immediate increase in electric organ discharge, suggesting modification of existing ion channels in the electric organ, rather than altered genomic expression. Exaggeration of electric organ discharge sex differences implies a social function. Daily reduction of duration and amplitude may reduce predation risk or energy expenditure.
Starting Page	759
Ending Page	768
Page Count	10
File Format	PDF
ISSN	03407594
Journal	Journal of Comparative Physiology A
Volume Number	183
Issue Number	6
e-ISSN	14321351
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-12-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Behavioral Neuroscience Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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Plasticity of the electric organ discharge waveform of the electric fish Brachyhypopomus pinnicaudatus I. Quantification of day-night changes

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