Results 251 to 260 of about 7,827 (274)

Numerical Simulations of the Electric Organ Discharge of Weakly Electric Fish

1993
A model of a weakly electric fish was constructed with data taken from Apteronotus leptorhynchus, and the electric organ discharge was simulated using boundary element and finite element methods. Maps of the electric potential measured around a live fish were used to calibrate the model parameters and test the results.
Christopher Assad, Brian Rasnow, James M. Bower   +2 more
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Plasticity of the electric organ discharge: implications for the regulation of ionic currents

Journal of Experimental Biology, 1999
ABSTRACT Weakly electric fish emit electric organ discharges (EODs) to locate objects around themselves and for communication. The EOD is generated by a simple hierarchically organized, neurophysiologically accessible circuit, the electromotor system.
, Zakon, , Mcanelly, , Smith, , Dunlap, , Lopreato, , Oestreich, , Few   +6 more
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Temperature sensitivity of the electric organ discharge waveform in Gymnotus carapo

Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 2001
At the southern boundary of gymnotiform distribution in America. water temperature changes seasonally, and may be an environmental cue for the onset of breeding. In this study, we aim to describe the role of temperature upon electric organ discharge waveform in Gymnotus carapo, order Gymnotiformes, family Gymnotidae, and to analyze its interactions ...
J L, Ardanaz, A, Silva, O, Macadar
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Effect of temperature on the discharge rates of the electric organ of some gymnotids

Comparative Biochemistry and Physiology, 1968
Abstract 1. 1. The discharge rates of the electric organs of six species of Gymnotidae, living in the Rio Negro, were between 60 and 1600/sec at 28°C—which was the surface temperature of the river—and had Q10-values of around 1·5. 2. 2. The lower and upper tolerated temperatures were 19–25° and 30–37°C, respectively.
P S, Enger, T, Szabo
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Avoidance conditioning of the rate of electric organ discharge in mormyrid fish

Animal Behaviour, 1968
In Mormyrid fish the electric organ appears to discharge as a single unit, and the frequency of discharge is a simply quantifiable behavioural variable. Following a study showing that acceleration in discharge rate can be conditioned classically, demonstration of operant conditioning was undertaken using a yoked control procedure. For each pair of fish
F J, Mandriota, R L, Thompson, M V, Bennett   +2 more
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Modulations of Electric Organ Discharge and Representation of the Modulations on Electroreceptors

2011
Weakly electric fish can recognize object’s parameters, such as material, size, distance and shape, in complete darkness. The ability to recognize these object’s parameters is provided by electrosensory system of the fish. The fish generates electric field using its electric organ (EOD: electric organ discharge).
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Discrimination of individually characteristic electric organ discharges by a weakly electric fish

Animal Behaviour, 1992
Abstract Waveform analysis of the electric organ discharges (EODs) of the weakly electric fish Gymnotus carapo found significant variation between individuals but little variation in EODs from the same individual. That is, EOD waveforms are individually distinctive.
Peter K. McGregor, G.W. Max Westby
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Electric signaling behavior and the mechanisms of electric organ discharge production in mormyrid fish

Journal of Physiology-Paris, 2002
Mormyrid fish communicate and navigate using electric organ discharges (EODs). The EOD is highly stereotyped and provides information on sender identity, including species, sex, reproductive condition, and possibly relative status and individual identity.
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Electrical stimulation of the preoptic area in Eigenmannia : evoked interruptions in the electric organ discharge

Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 2000
The functional role of the basal forebrain and preoptic regions in modulating the normally regular electric organ discharge was determined by focal brain stimulation in the weakly electric fish, Eigenmannia. The rostral preoptic area, which is connected with the diencephalic prepacemaker nucleus, was examined physiologically by electrical stimulation ...
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Species Diversity of Electric Organ Discharge Activity

1990
The discharge activity of an electric fish depends on the complex anatomical and physiological detail of its electric organs (for the discharge waveform) and central nervous command structures (for the discharge rate). Phylogenetic groups and, within a group, the species it comprises, differ in these structures and their physiological properties (see ...
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