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Gymnotiformes (Knifefishes) >
Gymnotidae (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); onca: Named for the jaguar Panthera onca, referring to the characteristic color pattern of broad irregular dark pigment blotches. Noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
البيئة
; المياه العذبة القاع. Subtropical
South America: upper Amazon River basin, Brazil.
الحجم / وزن / العمر
Maturity: Lm ?  range ? - ? cm
Max length : 12.0 cm TL ذكر/ مختلط الجنس; (Ref. 36692)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
Possess broad irregular dark pigment blotches without alternating light and dark pigments bands and very short head (head length 8.8% TL versus 9-13).
Facultative air-breathing in the genus (Ref. 126274); Collected in a whitewater floating meadow of the floodplain in the Tefé region (Ref. 41292).
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Albert, J.S. and W.G.R. Crampton, 2001. Five new species of Gymnotus (Teleostei: Gymnotiformes) from an upper Amazon floodplain, with descriptions of electric organ discharges and ecology. Ichthyol. Explor. Freshwat. 12(3):241-266. (Ref. 41292)
IUCN Red List Status (Ref. 130435: Version 2024-1)
استخدامات بشرية
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مصادر علي الأنترنت
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=0.00427 (0.00204 - 0.00890), b=2.99 (2.80 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).