Klassifizierung / Names
Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa
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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.
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
; süßwasser; brackwasser demersal; tiefenbereich ? - 10 m (Ref. 116857). Tropical
South America: Amazon and Orinoco basins in Brazil, Guyana, Peru and Venezuela.
Größe / Gewicht / Alter
Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 7.1 cm SL Männchen/unbestimmt; (Ref. 116857)
Kurzbeschreibung
Bestimmungsschlüssel | Morphologie | Morphometrie
Rückenflossenstacheln (insgesamt) : 2; Rückenflossenweichstrahlen (insgesamt) : 6; Afterflossenweichstrahlen: 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).
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | 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)
IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Tools
Zusatzinformationen
Download XML
Internet Quellen
Schätzungen auf der Grundlage von Modellen
Phylogenetischer Diversitätsindex (Ref. 82804) |
PD50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01479 (0.00651 - 0.03363), b=2.99 (2.79 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trophische Ebene (Ref. 69278) |
2.9 ±0.4 se; based on size and trophs of closest relatives |
Widerstandsfähigkeit (Ref. 120179) |
hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.). |
Anfälligkeit der Fischerei (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |