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Actinopterygii (ray-finned fishes) > Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes)
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; benthopelagic. Tropical; 22°C - 28°C (Ref. 13614), preferred ?

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

South America: Southern part of Venezuela, including Territorio Amazonas and south of Estado Apure; also known from tributaries of Rio Negro in Brazil.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 28.1 cm TL male/unsexed; (Ref. 26457)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal soft rays: 222 - 290; Vertebrae: 96 - 99. Distance between tip of pectoral fin and origin of anal fin less than one pectoral fin length; dark oblique bands on body 18-30 (usually below 30); dark and pale oblique bands with straight borders; greatest body depth 7-11% in total length; eye diameter 33-43% of interocular distance; head length 68-78% of preanal fin distance; maximum scale rows above lateral line 12-13; precaudal vertebrae 31-32; caudal vertebrae 65-67.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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

Mago-Leccia, F., 1994. Electric fishes of the continental waters of America. Fundacion para el Desarrollo de las Ciencias Fisicas, Matematicas y Naturales (FUDECI), Biblioteca de la Academia de Ciencias Fisicas. Matematicas y Naturales, Caracas, Venezuela. vol. 29 . 206 p. (Ref. 26457)

IUCN Red List Status (Ref. 115185)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00589 (0.00181 - 0.01912), b=2.97 (2.71 - 3.23), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic Level (Ref. 69278): 3.3 ±0.4 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Vulnerability (Ref. 59153): Low to moderate vulnerability (25 of 100) .

Entered by Binohlan, Crispina B.

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Gymnotus pedanopterus Mago-Leccia, 1994