Classification / Names
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Gymnotiformes (Knifefishes) >
Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); pantanal: The specific epithet pantanal from the Pantanal Matogrossense of Brazil, the hydrological region of the type locality. A noun in apposition..
Environment: milieu / climate zone / depth range / distribution range
Écologie
; eau douce démersal. Tropical
South America: Brazil, Paraguay and Bolivia.
Taille / Poids / Âge
Maturity: Lm ? range ? - ? cm
Max length : 26.0 cm TL mâle / non sexé; (Ref. 118108)
Description synthétique
Morphologie | Morphométrie
Gymnotus pantanal differs from other members of the G. pantherinus species-
group (except G. anguillaris) in possessing a color pattern composed of thin obliquely oriented pale pigment bands (about one third the width of the dark bands) with wavy margins restricted to the ventral portion of the body (rarely extending above the lateral line) on
the anterior half of the body. Gymnotus pantanal further differs from other members of the G. pantherinus species-group in possessing a wider head (72–77 vs. 52–69% head length). Gymnotus pantanal further differs from G. anguillaris in possessing more narrowly set eyes (37–41 vs. 43–56% head length), a deeper head (66–74 vs. 60–65% head length), larger branchial openings (38–43 vs. 29–36% head length), longer pectoral fins (51–56 vs.
42–50% head length), more pectoral-fin rays (mode 17 vs. 16), and fewer pored posterior
lateral-line scales (to first ventral ramus: 47–58 vs. 58–62; total: 102–114 vs. 124–130).
Facultative air-breathing in the genus (Ref. 126274); Found in rooted grasses and floating macrophytes in small creeks and along the banks of larger backwater rivers (Ref. 54472). Occurs syntopically with Gymnotus inaequilabiatus and G. sylvius (Ref. 54472).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Fernandes, F.M.C., J.S. Albert, M.F.Z. Daniel-Silva, C.E. Lopes, W.G.R. Crampton and L.F. Almeida-Toledo, 2005. A new Gymnotus (Teleostei: Gymnotiformes: Gymnotidae) from the Pantanal Matogrossense of Brazil and adjacent drainages: continued documention of a cryptic fauna. Zootaxa 933:1-14. (Ref. 54472)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Plus d'informations
Noms communsSynonymesMétabolismePrédateursÉcotoxicologieReproductionMaturitéFraiRassemblement de ponteFéconditéŒufsDéveloppement de l'œuf
Taille/ÂgeCroissanceLongueur-poidsLongueur-longueurFréquences de longueursMorphométrieMorphologieLarvesDynamique des populations larvairesRecrutementAbondanceBRUVS
RéférencesAquacultureProfil d'aquacultureSouchesGénétiqueElectrophoresesHéritabilitéPathologiesTraitementNutrientsMass conversion
CollaborateursImagesStamps, Coins Misc.SonsCiguateraVitesseType de nageSurface branchialeOtolithesCerveauxVision
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00437 (0.00209 - 0.00911), b=2.98 (2.79 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Résilience (Ref.
120179): Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (16 of 100).
