Classificatie / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stevardiinae
Etymology: Bryconamericus: Greek, bryko = to bite + America, latinized (Ref. 45335); caldasi: Named for the Colombian naturalist Francisco José de Caldas, who devoted his life to the study of Neotropical nature, and whose intellectual merit lies in having embraced the incipient patriotic fervor in the struggle for Colombian independence in the first half of the nineteenth century..
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water benthopelagisch; pH range: 7.0 - 8.3. Tropical
South America: La Libertad Creek, middle Cauca River Basin in Colombia.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 7.4 cm SL mannelijk / geslacht onbekend; (Ref. 106071)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 10; Wervels: 38 - 41. Bryconamericus caldasi can be distinguished from most congeners by the following characters: sides of the body with a dark lateral stripe overlaid by a peduncular spot and reticulated pattern (vs. peduncular spot and other body pigments not superimposed over a dark lateral stripe, except in B. oroensis which has a dark lateral stripe on body from posterior edge of opercle to base of caudal fin); 15-17 predorsal scales (vs. 9-14, except B. andresoi with 13-15, B. galvisi with 12-17, B. huilae with 14-19, B. plutarcoi and B. foncensis with 11-16); and a wide anterior maxilla tooth, at least twice as wide as the posterior tooth, both of which are pen¬tacuspid (vs. maxilla teeth of same size). It differs from B. oroensis by: pectoral-fin length (16.4-22.3% SL vs. 32.0-39.3% SL), pelvic-fin length (10.7-16.8% SL vs. 22.0-25.9% SL), caudal peduncle depth (9.3-14.9% SL vs. 16.7-23.8% SL), dorsal-anal fin distance (24.4-36.0% SL vs. 10.8-13.0% SL), dorsal-pectoral distance (34.4-45.6% SL vs.9.4-13.5% SL), anal-fin length (9.4-18.3% SL vs. 23.4-27.8% SL), length of maxilla (35.8-48.9% HL vs. 22.3-36.2% HL), and 4-5 scale rows between pelvic-fin and lateral lines (vs. 6-8). It can be diagnosed from the sympatric B. caucanus by having 15-17 predorsal median scales (vs.12-13), pectoral-fins not reaching or just reaching pelvic-fin insertions (vs. pectoral fins reaching poste¬rior to pelvic-fin insertions), convex predorsal profile (vs. oblique), small scales arranged in two or more rows at caudal-fin base (vs. large scales in just one row), and dorsal-fin origin position at vertical through posterior tip of pelvic-fin (vs. at a vertical anterior to pelvic-fin tip) (Ref. 106071).
Occurs in a clear creek characterized by a relatively rapid water current, running over rocky and sandy bottoms. Syntopic with Andinoacara sp., Astroblepus sp., Brycon henni, Hemibrycon boquiae, H. rafaelense, Chaetostoma fischeri, Poecilia caucana, Xiphophorus hellerii, and Trichomycterus caliensis. The stomach contents of three specimens include adults and larvae of different species of Diptera (12.5%, 4.0 mm3), Diptera: Simulidae (12.5%, 3.0 mm3), Diptera: Chironomidae (12.5%, 3.0 mm3), Diptera: Dixidae (12.5%, 2.0 mm3), Trichoptera: Leptoceridae (12.5%, 14.0 mm3), Ephemeroptera: Baetidae (25%, 5.0 mm3), Hymenoptera: Vespidae (12.5%, 2.0 mm3).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Román-Valencia, C., R.I. Ruiz-C., D.C. Taphorn B. and C. García-Alzate, 2014. A new endemic species of Bryconamericus (Characiformes, Characidae) from the Middle Cauca River Basin, Colombia. Animal Biodiversity and Conservation 37.2:107-114. (Ref. 106071)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
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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=0.01585 (0.00663 - 0.03787), b=2.95 (2.77 - 3.13), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 2.6 ±0.3 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).
