Electrophorus electricus, Electric eel : fisheries, gamefish, aquarium

Electrophorus electricus (Linnaeus, 1766)

Electric eel
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Electrophorus electricus
Immagine di Holm, E.

Classificazione / Nomi Nomi Comuni | Sinonimi | Catalog of Fishes(Genere, Specie) | ITIS | CoL | WoRMS | Cloffa

> Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes) > Electrophorinae
Etymology: Electrophorus: Greek, elektron = amber + Greek,pherein = to carry (Ref. 45335).
More on author: Linnaeus.

Taxonomic Remarks
If confirmed as having been actually made available before Gymnotus electricus Linnaeus (1766), Gymnotus tremulus Houttuyn (1764) should be regarded as the senior synonym. However, following Articles 23.9.1 and 23.9.2 of the Code (ICZN, 1999), Gymnotus electricus must be regarded as the valid name, and qualified as a nomen protectum, and Gymnotus tremulus as a nomen oblitum. It seems that both Houttuyn’s (1764) and Linnaeus’ (1766) descriptions were based on previous descriptions by other authors (i.e., primarily, Gronovius and Seba), and that no specimens were actually examined by these authors regarding their proposals of new species. Gronovius’ specimen (or specimens) is currently probably lost, but Seba’s specimen (which apparently have come from the Essequibo river; Seba, 1758, III, p.108, pl. 34, fig. 6) is probably housed in the Rijksmuseum van Natuurlijke Historie, Leiden (Netherlands). That should, then, be considered the remaining name-bearing type for both species above (ICZN, 1999, Article 72.5.6).

Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione Ecologia

; acqua dolce benthopelagico. Tropical; 23°C - 28°C (Ref. 1672)

Distribuzione Territories | Aree FAO | Ecosistemi | Presenze | Mappa dei ritrovamenti | Introduzioni | Faunafri

South America: restricted to the Guiana Shield.

Dimensione / Peso / Età

Maturità: Lm ?  range ? - ? cm
Max length : 250 cm SL maschio/sesso non determinato; (Ref. 27188); peso massimo pubblicato: 20.0 kg (Ref. 27188)

Breve descrizione Chiavi di identificazione | Morfologia | Morfometria

Spine dorsali (totale) : 0; Raggi dorsali molli (totale) : 0. This species is distinguished by the following characters: ventral outline of head U-shaped, widest at terminus of branchial opening and lateral-line pores 88-101 (vs. ovoid, widest anterior to branchial opening, 112-146 in E. voltai); differs from E. varii with skull depressed, cleithrum lies between vertebrae 5 and 6 (vs. (vs. skull deep with cleithrum lying between vertebrae 1 and 2), pectoral-fin rays 32-38 (vs. 20-28) and lateral-line pores 88-101 (vs. 124-186). Low-voltage (Sachs’ organ) electric organ discharges or EODs and high-voltage (main/Hunter’s organ) with head-positive monophasic waveform. Low voltage EOD 2.03-2.19 ms duration; high-voltage EOD 480 V at 760mm TL (Ref. 120918).
Body shape (shape guide): elongated; Cross section: oval.

Biologia     Glossario (es. epibenthic)

Prefer muddy bottoms and calm waters; frequently found in coastal plains, swamps and creeks but is also found inland where a favorable biotope exist. Juveniles feed on invertebrates, adults feed on fish and small mammals (Ref. 12225), first-born larvae prey on other eggs and embryos coming from late spawning batches (Ref. 40645). The electric organ of this species consists of flattened electrocytes, numbering to about hundreds of thousands, connected in series (Ref. 10840; 10011). Generates two type of electric organ discharges (EODs) from different electric organs which are of myogenic derivation: 1) low-voltage EODs (about 10 V) emitted by the Sach's organ at rates of up to 25 Hz, and 2) high-voltage EODs (about 50-fold) emitted by the main and Hunter's organs at peak rates of up to several hundred Hz. Low-voltage EOD has been associated with electro location whereas high-voltage EOD has been noted during predatory attacks (Ref. 10011). An EOD of 500 V was recorded from a 1 m specimen (Ref. 10530), making it a potentially dangerous species. Incorporation of this species in fish-based house security systems has been suggested (see Ref. 9506). Also possesses high-frequency sensitive tuberous receptors patchily distributed over the body that seems useful for hunting other gymnotiforms (Ref. 10583). A nocturnal species; captive specimens showed higher low-voltage EOD activity during the night compared to daytime (Ref. 10011). This cycle seems to be free-running (internally controlled) (Ref. 10829). Probably a fractional spawner; fecundity count was17,000 eggs (Ref. 10630). An obligatory air breather (Ref. 10011) and can withstand poorly oxygenated water (Ref. 26457). Used in experimental studies.

Ciclo vitale e comportamento di accoppiamento Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve

Males construct foam nests and guard the growing larvae until mid-January when the first seasonal rains flood the breeding area, causing the about 10 cm long young eels to disperse (Ref. 40645). Males outnumber females (3:1) and are considerably larger than females (Ref. 40645). There are three successive batches of eggs deposited in a spawning period. Not all eels with fully developed gonads (in Goiapi drainnage) participated in the annual spawning activity suggesting that mating success depends in part on finding suitable breeding sites (Ref. 40645).

Riferimento principale Caricare le referenze | Bibliografia | Coordinatore : Campos-da-Paz, Ricardo | Collaboratori

de Santana, C.D., W.G.R. Crampton, C.B. Dillman, R.G. Frederico, M.H. Sabaj, R. Covain, J. Ready, J. Zuanon, R.R. de Oliveira, R.N. Mendes-Júnior, D.A. Bastos, T.F. Teixeira, J. Mol, W. Ohara, N.C. de Castro, L.A. Peixoto et al., 2019. Unexpected species diversity in electric eels with a description of the strongest living bioelectricity generator. Nature Communications (2019)10:4000. [+authors; Nagamachi, C.; Sousa, L.; Montag, L.F.A.; Ribeiro, F.; Waddell, J.C.; Piorsky, N.M.; Vari, R.P.; Wosiacki, W.B.] (Ref. 120918)

Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))

  Least Concern (LC) ; Date assessed: 12 August 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Minaccia per l'uomo

Other





Usi umani

Pesca: commerciale; Pesce da pesca sportiva: si; Acquario: Acquari pubblici
FAO - Publication: search | FishSource |

Informazioni ulteriori

Ecologia trofica
Articoli alimentari (prede)
Alimentazione
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Razioni alimentari
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Ecologia
Ecologia
Dinamica della popolazione
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Maturità/Gli occhielli sono relativi.
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Francobolli, monete, materiale vario.
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Bibliografia

Strumenti

Quiz organico | Libro elettronico | Giuda pratica | Generatore frequenze di lunghezza | Strumento Parametri Biologici | Mappa dei ritrovamenti | Cattura-MSY |

Rapporti speciali

Controllo della manutenzione dell'acquario | Verificare la presenza di schede informative sulle specie | Verifica delle schede informative sull'acquacoltura

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Fonti Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Genere, Specie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | Acquari pubblici | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, ricerca | World Records Freshwater Fishing | Record zoologico

Stime basate su modelli

Indice di diversità filogenetica
(Fonte Biblio. 82804) 		PD50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Livello trofico
(Fonte Biblio. 69278) 		3.9   ±0.52 se; based on food items.
Resilienza
(Fonte Biblio. 120179) 		Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (tm=3; tmax=6 (captive); Fec=17,000).
Vulnerabilità della pesca
(Ref. 59153) 		High vulnerability (61 of 100). 🛈
Categoria di prezzo
(Ref. 80766) 		Unknown.