Convergent designs for electrogenesis and electroreception

  title={Convergent designs for electrogenesis and electroreception},
  author={Carl D. Hopkins},
  journal={Current Opinion in Neurobiology},
  • C. Hopkins
  • Published 1 December 1995
  • Biology
  • Current Opinion in Neurobiology
Comparative Neurophysiology: An Electric Convergence in Fish
Post-natal development of the electromotor system in a pulse gymnotid electric fish
The analysis of data from the anatomo-functional study of fish sized between 10 and 300 mm from the species of Gymnotus allowed us to identify three main periods in post-natal development of electrogenesis: before fish reach 55 mm in length, when maturation of neural structures is the main factor determining a characteristic sequence of changes observed in the discharge timing and waveform.
Communication: Potassium Channels Define the Dialect
Physiology of Tuberous Electrosensory Systems
This chapter presented an abundance of information about how peripheral and central physiological mechanisms carry out these behavioral functions, electrolocation and electrocommunication, of tuberous electrosensory system.
Species-Specific Diversity of a Fixed Motor Pattern: The Electric Organ Discharge of Gymnotus
A common pattern in electromotive force is found, with the far field and near field diversity determined by variations in amplitude, duration, and the degree of synchronization of the different components of the electric organ discharges of weakly electric fishes.
The electric organ discharge of pulse gymnotiforms: the transformation of a simple impulse into a complex spatio-temporal electromotor pattern
  • Caputi
  • Biology
    The Journal of experimental biology
  • 1999
An understanding of how the nervous system processes an impulse-like input to yield a stereotyped, species-specific electromotor output is relevant for electric fish physiology, but also for
From Sequence to Spike to Spark: Evo-devo-neuroethology of Electric Communication in Mormyrid Fishes
The mechanisms of electric signal generation, reception, and analysis are reviewed and relate these to the current understanding of the evolution and development of electromotor and electrosensory systems.
Electrocommunication in pulse Gymnotiformes: the role of electric organ discharge (EOD) time course in species identification
Evidence is provided that pulse Gymnotiformes can recognize a conspecific exclusively through species-specific electrosensory signals, and it is suggested that the key signal features for species differentiation are probably encoded by burst coder electroreceptors.


Species differences in electric organs of mormyrids: Substrates for species‐typical electric organ discharge waveforms
  • A. Bass
  • Biology
    The Journal of comparative neurology
  • 1986
The organization of electric organs is described for the mormyrid fishes from Africa because each species' particular electrocyte “profile” must underlie the development of species‐specific and hormone‐dependent sex differences in the EOD waveforms.
Morphology and physiology of the brainstem nuclei controlling the electric organ discharge in mormyrid fish
The morphology and physiology of neurons in these two nuclei are characterized, and the hypothesis that nucleus C is the command nucleus responsible for initiating the electric organ discharge is tested.
Synodontid catfish: a new group of weakly electric fish. Behavior and anatomy.
Three species of synodontid catfish can produce weak biphasic electric discharges in either continuous or burst-like fashion. The peak-power frequency of these electric organ discharges is around 100
Phylogenetic analysis of the South American electric fishes (order Gymnotiformes) and the evolution of their electrogenic system: a synthesis based on morphology, electrophysiology, and mitochondrial sequence data.
By combining molecular, morphological, and physiological information, a new hypothesis is proposed for the phylogeny of this group and a new family Eigenmanniidae n.
Pathways of the electric organ discharge command and its corollary discharges in mormyrid fish
The motoneurons which innervate the mormyrid electric organ are driven by a descending volley from the medullary relay nucleus. This nucleus does not initiate the electric organ discharge (EOD) but
Temporal coding of species recognition signals in an electric fish.
An electric fish in the African family Mormyridae recognizes members of its own species by "listening" to electric organ discharges, which are species-specific signatures. Reactions of fish in the
On the Function and Evolution of Electric Organs in Fish
A theory has been proposed which suggests that these fish, by means of their electric pulses, can locate objects if their electrical conductivity differs from that of water, and show striking features of convergent evolution.
A time-comparison circuit in the electric fish midbrain. I. Behavior and physiology
The neural basis of this remarkable temporal resolution of the weakly electric fish, Eigenmannia, was investigated by recording from elements of the phase-coding system, a chain of electrotonically connected neurons devoted to the processing of temporal information.
Electrocommunication in Teleost Fishes: Behavior and Experiments
This volume provides a detailed account of bony fishes' biology and behavior and their sophisticated sensory capacities as well as the physiology and anatomy of the electrosensory-motor system and the integration to form an efficient intelligence system.
Anatomical and functional organization of the prepacemaker nucleus in gymnotiform electric fish: The accommodation of two behaviors in one nucleus
The diencephalic prepacemaker nucleus (PPn) of gymnotiform electric fish projects to the medullary pacemaker nucleus and modulates its regular firing frequency and elicited frequency modulations were similar to those observed during the jamming avoidance response and during courtship.