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Siluriformes (Catfishes) >
Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: Trichomycterus: Greek, thrix = hair + Greek, mykter, -eros = nose (Ref. 45335); giganteus: Derived from the Latin giganteus (gigantic), referring to its large size, the biggest among species from southeastern Brazil..
More on authors: Lima & Costa.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water demersaal. Tropical
South America: Upper Rio Guandu basin in southeastern Brazil.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 20.4 cm SL mannelijk / geslacht onbekend; (Ref. 54465)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 12 - 13; Anale zachte stralen: 10 - 11; Wervels: 36 - 37. Distinguishable from the other species of the genus by having a broad dark bluish gray stripe along lateral midline of body, restricted to inner layer of tegument, overlapped by superficial dark brown spots. Also distinguished from the remaining species of the southeastern Brazil by having nine pectoral-fin rays, high number of odontodes (interopercular 59-70 vs. 30-52, opercular 23-30 vs. 10-20), anal-fin origin at vertical posterior to dorsal-fin base and a dark gray opercular patch of odontodes vs. light yellow . Differs from T. nigricans and T. immaculatus by a combination of longer nasal and maxillary barbels (nasal reaching pectoral fin base, vs. between orbit and opercular patch of odontodes; maxillary reaching anterior third of pectoral fin, vs. to interopercular patch of odontodes) and a single median third supraorbital pore vs. third supraorbital pore paired (Ref. 54465).
Although the type locality is a clear water stream with strong current, all specimens were found in still water between 50 and 200 cm deep, hidden under rocks (Ref. 54465).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Lima, S.M.Q. and W.J.E.M. Costa, 2004. Trichomycterus giganteus (Siluriformes: Loricarioidea: Trichomycteridae): a new catfish from the Rio Guandu basin, southeastern Brazil. Zootaxa 761:1-6. (Ref. 54465)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00319 - 0.02993), b=3.02 (2.77 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Assuming Fec < 100).
Fishing Vulnerability (Ref.
59153): Low vulnerability (15 of 100).
