The shocking predatory strike of the electric eel

@article{Catania2014TheSP,
  title={The shocking predatory strike of the electric eel},
  author={Kenneth C Catania},
  journal={Science},
  year={2014},
  volume={346},
  pages={1231 - 1234}
}
  • K. Catania
  • Published 5 December 2014
  • Environmental Science, Biology
  • Science
Electric eels can incapacitate prey with an electric discharge, but the mechanism of the eel’s attack is unknown. Through a series of experiments, I show that eel high-voltage discharges can activate prey motor neurons, and hence muscles, allowing eels to remotely control their target. Eels prevent escape in free-swimming prey using high-frequency volleys to induce immobilizing whole-body muscle contraction (tetanus). Further, when prey are hidden, eels can emit periodic volleys of two or three… 

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References

SHOWING 1-10 OF 46 REFERENCES

Electric organ discharge (EOD) and prey capture behaviour in the electric eel, Electrophorus electricus

  • R. Bauer
  • Physics, Environmental Science
    Behavioral Ecology and Sociobiology
  • 2004
The prey capture behaviour and the pattern of the associated electric organ discharge (EOD) were studied in the electric eel, Electrophorus electricus and no evidence was found that the prey was detected by the low-voltage EOD.

The electric sense of sharks and rays.

  • A. Kalmijn
  • Environmental Science
    The Journal of experimental biology
  • 1971
The experiments described demonstrate clearly that the shark Scyliorhinus canicula and the ray Raja clavata make a biologically significant use of their electrical sensitivity and are justified in accrediting the animals with an electric sense and in designating the ampullae of Lorenzini as electroreceptors.

The Shocking History of Electric Fishes: From Ancient Epochs to the Birth of Modern Neurophysiology

PART I: INTRODUCTION 1- The Allure of Electric Fishes: Humboldt's Obsession PART II: ANCIENT CULTURES 2- The Shocking Catfish of the Nile 3- Torpedoes in the Greco-Roman World: Pt. 1. Wonders of

How Electric Fish Became Sources of Acetylcholine Receptor

  • J. Keesey
  • Biology
    Journal of the history of the neurosciences
  • 2005
The purpose of this communication is to describe the historical steps by which fish electric organs were eventually determined to be modified motor endplates and therefore a plentiful source of

Firing patterns of motor units in normal rats

Recording for extended periods from single motor units in the fast extensor digitorum longus (edl) and the slow soleus (sol) muscle of freely moving adult rats yields information about firing rate, amount of use, modulation of muscle force and tonic and phasic behaviour for 16 motor units.

Effects of high-frequency stimulation and doublets on dynamic contractions in rat soleus muscle exposed to normal and high extracellular [K+]

Results indicate that stimulation with supratetanic frequencies can improve dynamic muscle contractility, but improvements are attenuated when muscles are exposed to high extracellular [K+].

The ecology, discharge diversity and predatory behaviour of gymnotiforme electric fish in the coastal streams of French Guiana

  • G. Westby
  • Environmental Science
    Behavioral Ecology and Sociobiology
  • 2004
Developmental data for this species support the view that, as in other weakly electric gymnotoids, a primitive larval electric organ probably precedes the adult structure, lending weight to published theories of an Electrophorus-like ancestor to the wekly electric fish.

The influence of a doublet of stimuli at the beginning of the tetanus on its time course.

The results show that slow units are characterized by better summation of their tension at the beginning of a tetanus, compared to fast units which showed greater sensitivity of the tension and the tetanus area to the doublet than fast units.

Genomic basis for the convergent evolution of electric organs

The results indicate that, despite millions of years of evolution and large differences in the morphology of electric organ cells, independent lineages have leveraged similar transcription factors and developmental and cellular pathways in the evolution of electric organs.

Doublet discharge stimulation increases sarcoplasmic reticulum Ca2+ release and improves performance during fatiguing contractions in mouse muscle fibres

Doublets are beneficial in that they improve contractile performance when added at any stage of strenuous activity, although the effect is largest in early fatigue stages.