Electrophorus electricus, Electric eel : fisheries, aquarium

Electrophorus electricus (Linnaeus, 1766)

Electric eel
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Electrophorus electricus
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Classificação / Names Nomes comuns | Sinônimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

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

Environment: milieu / climate zone / depth range / distribution range Ecologia

; Água doce bentopelágico.   Tropical; 23°C - 28°C (Ref. 1672)

Distribuição Países | Áreas da FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

South America: restricted to the Guiana Shield.

Tamanho / Peso / Idade

Maturity: Lm ?  range ? - ? cm
Max length : 250 cm SL macho/indeterminado; (Ref. 27188); peso máx. publicado: 20.0 kg (Ref. 27188)

Descrição suscinta Morfologia | Morfometria

Espinhos dorsais (total): 0; Raios dorsais (total): 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).

Biologia     Glossário (p.ex. 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 de vida ou comportamento de acasalamento Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

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).

Referência principal Upload your references | Referências | Coordenador : Campos-da-Paz, Ricardo | Colaboradores

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, C. Nagamachi, 2019. Sousa, L.; Montag, L.F.A.; Ribeiro, F.; Waddell, J.C.; Piorsky, N.M.; Vari, R.P.; Wosiacki, W.B. Unexpected species diversity in electric eels with a description of the strongest living bioelectricity generator. Nature Communications (2019)10:4000. (Ref. 120918)

Status na Lista Vermelha da UICN (Ref. 120744)

  Segura ou pouco preocupante (LC) ; Date assessed: 01 March 2007

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para os humanos

Other





Uso pelos humanos

Pescarias: espécies comerciais; Aquário: Aquários públicos
FAO(Publication : search) | FishSource |

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Estimates based on models

Índice de diversidade filogenética (Ref. 82805):  PD50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00427 (0.00203 - 0.00898), b=3.04 (2.84 - 3.24), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nível Trófico (Ref. 69278):  3.9   ±0.52 se; Based on food items.
Resiliência (Ref. 120179):  médio(a), tempo mínimo de duplicação da população 1,4 - 4,4 anos (tm=3; tmax=6 (captive); Fec=17,000).
Vulnerabilidade (Ref. 59153):  High vulnerability (61 of 100) .
Categoria de preço (Ref. 80766):   Unknown.