Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Gymnotiformes
(Knifefishes) > Gymnotidae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
South America: Rio Magdalena basin in Colombia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
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).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 115185)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00589 (0.00179 - 0.01938), 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 (29 of 100) .