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Electrophorus varii de Santana, Wosiacki, Crampton, Sabaj, Dillman, Mendes-Júnior & Castro e Castro, 2019

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drawing shows typical species in Gymnotidae.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

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

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

Freshwater; benthopelagic. Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: lowland floodplain and terra-firme systems of the intercratonic Amazon Basin; including some streams in the Guiana Shield.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 149 cm TL male/unsexed; (Ref. 120918)

Short description Identification keys | Morphology | Morphometrics

This species is distinguished by the following characters: pectoral-fin rays 20-28; lateral-line pores 124-186 ((vs. 32-38 and 88-101, respectively, in E. electricus); narrow head (vs. wide in E. voltai); the distance between medial margins of contralateral dentaries at transverse through last two ventral pores is 2-3 times shorter than E. voltai; deep skull, cleithrum lies between vertebrae 1 and 2 (vs. depressed with cleithrum lying between vertebrae 5 and 6, in E. electricus and E. voltai). Low-voltage electric organ discharges or EOD duration 1.24-1.78 ms, high-voltage EOD 151 V (20.0 cm TL) to 572 V (60.9 cm TL) (Ref. 120918).

Biology     Glossary (e.g. epibenthic)

Obligate air-breathing (Ref. 126274)

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator : Campos-da-Paz, Ricardo | Collaborators

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)

IUCN Red List Status (Ref. 130435)

  Not Evaluated 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
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Ecology
Ecology
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Max. ages / sizes
Length-weight rel.
Length-length rel.
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Genetics
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Stamps, coins, misc.
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References

Tools

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Summary page | Point data | Common names | Photos

Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = No PD50 data   [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).
Trophic level (Ref. 69278):  3.5   ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref. 120179):  Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (89 of 100).