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Characiformes (Characins) >
Stevardiidae (Stevardiids) > Diapominae
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.
Eponymy: Francisco José de Caldas (1768–1816) was a Colombian geographer, lawyer and self-taught naturalist. [...] (Ref. 128868), visit book page.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique; pH range: 7.0 - 8.3. Tropical
South America: La Libertad Creek, middle Cauca River Basin in Colombia.
Taille / Poids / Âge
Maturité: Lm ? range ? - ? cm
Max length : 7.4 cm SL mâle / non sexé; (Ref. 106071)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Rayons mous dorsaux (Total) : 10; Vertèbres: 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).
Body shape (shape guide): fusiform / normal.
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).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
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)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01288 (0.00544 - 0.03050), b=3.01 (2.82 - 3.20), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 2.6 ±0.3 se; based on size and trophs of closest relatives
Vulnérabilité de la pêche (Ref.
59153): Low vulnerability (10 of 100).
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