Classificatie / Namen
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Siluriformes (Catfishes) >
Doradidae (Thorny catfishes) > Doradinae
Etymology: Trachydoras: Greek, trachys, -eia, -ys = rough + Greek, doras = skin (Ref. 45335); gepharti: Named for George W. Gephart, Jr., President & CEO of the Academy of Natural Sciences of Drexel University from 2010 to 2017, for his bold, deft and heartfelt leadership of a Glorious Enterprise
into its third century.
Eponymy: George W Gephart Jr. [...] (Ref. 128868), visit book page.
Environment: milieu / Klimaatzone / Diepte / distribution range
Ecologie
; zoet water; brak water demersaal; diepte ? - 10 m (Ref. 116857). Tropical
South America: Amazon and Orinoco basins in Brazil, Guyana, Peru and Venezuela.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ? range ? - ? cm
Max length : 7.1 cm SL mannelijk / geslacht onbekend; (Ref. 116857)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 2; Dorsale zachte stralen (totaal) : 6; Anale zachte stralen: 12 - 15.
Body shape (shape guide): fusiform / normal.
Occurs usually along sandy beaches in large black and clearwater tributaries. Often forms schools at night in shallower water (<2 m) flowing swiftly over sandy bottoms. Shoals with Trachydoras microstomus in the Orinoco and T. nattereri and Trachydoras sp. 'mancha-caudal' in the río Nanay, Peru. Feeds mainly on midge larvae. The gut contents of an adult specimen measuring 5.94 cm SL from Rio Orinoco consisted mainly of chironomids (multiple species, mostly larvae, few pupae) along with a few ceratopogonids (larvae) and an empidid pupae) (Ref. 116857).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Sabaj, M.H. and M.A. Hernández, 2017. Taxonomic assesment of the hard-nosed thornycats (Siluriformes: Doradidae: Trachydoras Eigenmann 1925) with description of Trachydoras gepharti, n. sp. Proc. Acad. Nat. Scie. Philadelphia 166:1-53. (Ref. 116857)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-1)
Gevaar voor de mens
Harmless
Gebruik door de mens
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01514 (0.00660 - 0.03472), b=2.99 (2.79 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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