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

Teleostei (teleosts) > Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335).
Eponymy: Carlos Arturo Ardila Rodríguez is an ichthyologist who teaches at Universidad Metropolitana, Barranquilla, Colombia. He has made numerous contributions to the systematics of pencilfishes. (Ref. 128868), visit book page.

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

Freshwater; demersal. Tropical

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

South America: Rio Magdalena basin in Colombia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm

Short description Identification keys | Morphology | Morphometrics

Distinguished from all congeners by the following combination of characters: caudal end of the anal fin with a clear patch; dorso-posterior portion of the preopercle with two laterosensory canal pores ( from the preopercular-mandibular series); progressive loss of alternating dark and light pigments bands with the size; head length, 10.2-11.2% total length; anal fin pterygiophores with many scales (9-10); few pored lateral-line scales to first ramus (47-48); total number of pored lateral-line scales 84 (n=1); relatively large eye, orbital diameter 8.5-9.0% HL) (Ref. 54466).

Facultative air-breathing in the genus (Ref. 126274)

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

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

Maldonado-Ocampo, J.A. and J.S. Albert, 2004. Gymnotus ardilai: a new species of Neotropical electric fish (Ostariophysi: Gymnotidae) from the Rio Magdalena basin of Colombia. Zootaxa 759:1-10. (Ref. 54466)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Endangered (EN) (B1ab(iii)); Date assessed: 10 October 2014

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet composition
Food consumption
Food rations
Predators

Ecology
Ecology

Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance

Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics

Distribution
Countries
FAO areas
Ecosystems
Occurrences
Introductions
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Anatomy
Gill area
Brain
Otolith

Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)

Genetics
Genetics
Heterozygosity
Heritability

Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.

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Taxonomy
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Morphology
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References
References

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Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

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

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (19 of 100).

Gymnotus ardilai Maldonado-Ocampo & Albert, 2004