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Keywords: Eigenmannia
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Journal Articles
J Exp Biol (2013) 216 (22): 4272–4284.
Published: 15 November 2013
... of the JAR behavior in terms of a dynamical system model has not been achieved at least in part due to the fact that ‘avoidance’ behaviors are both intrinsically unstable and nonlinear. We overcame the instability of the JAR in Eigenmannia virescens by closing a feedback loop around the behavioral response...
Journal Articles
J Exp Biol (2012) 215 (23): 4196–4207.
Published: 1 December 2012
... the possibility that social context creates envelopes that drive behavior. When Eigenmannia virescens are in groups of three or more, the interactions between their pseudo-sinusoidal electric fields can generate ‘social envelopes’. We developed a simple mathematical prediction for how fish might respond...
Journal Articles
J Exp Biol (1999) 202 (10): 1365–1375.
Published: 15 May 1999
..., in the Apteronotus pacemaker nucleus, an excitatory, tonic input as in Eigenmannia , could introduce a high risk of jitter stemming from spontaneous fluctuations in this tonic drive ( Heiligenberg et al., 1996 ). This would be particularly detrimental to the performance of this system since the especially high...
Journal Articles
J Exp Biol (1999) 202 (10): 1267–1279.
Published: 15 May 1999
... . Bastian , J. and Heiligenberg , W. ( 1980 ). Neuronal correlates of the jamming avoidance response of Eigenmannia . J. Comp. Physiol . 136 , 135 – 152 . Berman , N. J. and Maler , L. ( 1998 ). Distal versus proximal inhibitory shaping of feedback excitation...
Journal Articles
Journal Articles
J Exp Biol (1999) 202 (10): 1387–1398.
Published: 15 May 1999
... waveforms. The EOD of Eigenmannia is sexually dimorphic in waveform and in the intensity of its higher harmonics. In a go/no go paradigm, trained food-rewarded fish discriminated between these waveforms, and naive (untrained) fish showed a significant preference. To determine whether spectral or waveform...
Journal Articles
J Exp Biol (1999) 202 (10): 1281–1289.
Published: 15 May 1999
... fish of the genus Eigenmannia . The roles of passive and active membrane properties of neurons, and frequency-dependent gain-control mechanisms are discussed. * e-mail: gary.rose@m.cc.utah.edu While much progress has been made in understanding the mechanisms that underlie the filtering...
Journal Articles
J Exp Biol (1999) 202 (10): 1205–1215.
Published: 15 May 1999
... and Gymnotus carapo , as well as several individuals of the wave-type species Eigenmannia sp., were trained to discriminate between capacitative and resistive objects in experiments that were similar to those described above for G. petersii . All three species could perform capacitance detection ( Fig. 6A...
Journal Articles
J Exp Biol (1991) 161 (1): 43–59.
Published: 1 November 1991
...Bernd Kramer; Ivo Kaunzinger ABSTRACT Eigenmannia’s frequency and intensity discrimination thresholds were determined for a range of seven frequencies (50–1700Hz), centered on a fish’s individual discharge frequency, using a conditioned go/no-go paradigm. The threshold criterion was ‘50% correct...
Journal Articles
Journal Articles
J Exp Biol (1987) 130 (1): 39–62.
Published: 1 July 1987
...Bernd Kramer ABSTRACT Eigenmannia’ s, jamming avoidance response (JAR) is a frequency change of its electric organ discharge (EOD) in response to an electric stimulus of similar frequency (small ΔF; ΔF = F Fish – F Stim ). It is assumed that the response to an unclamped stimulus, ΔR = F Response...
Journal Articles
J Exp Biol (1985) 119 (1): 41–69.
Published: 1 November 1985
...Bernd Kramer ABSTRACT The present report shows an intraspecific, sexually dimorphic variation in harmonic content and waveform, as well as intensity, of the Electric Organ Discharges (EODs) in the green knife fish, Eigenmannia ( Figs 2 , 11 ). There is a close correlation between harmonic content...