>
Characiformes (Characins) >
Alestidae (African tetras)
Etymology: Bryconaethiops: Greek, bryko = to bite+ Aethiops, region in North east Africa (Ref. 45335); yseuxi: Named after Dr. E. Yseux, professor at the Université Libre de Bruxelles (Ref. 74421).
Eponymy: Dr Émile Ghislain Joseph Yseux (1835–1915) was a professor of zoology at the Université Libre de Bruxelles, Belgium. He was also a physician and a founding member of the Royal Society of Public Medicine and Medical Topography of Belgium. (Ref. 128868), visit book page.
More on author: Boulenger.
Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
; agua dulce pelágico. Tropical
Africa: from Boma on the lower Congo River up to Pool Malebo, in Republic of Congo and Democratic Republic of the Congo basin (Ref. 74421).
Tamaño / Peso / Edad
Madurez: Lm ?  range ? - ? cm
Max length : 7.2 cm SL macho / no sexado; (Ref. 74421)
Descripción breve
Claves de identificación | Morfología | Morfometría
Espinas dorsales (total) : 0; Radios blandos dorsales (total) : 10; Espinas anales: 0; Radios blandos anales: 21 - 23. Bryconaethiops yseuxi can be distinguished from all other known Bryconaethiops species based on the following unique combination of characters: a high number of scale rows between anterior origin of dorsal fin and lateral line (7.5 vs. 6.5 or less); a low number of gill rakers on the first gill arch; and a long dorsal-fin and anal-fin bases, respectively 15.7-17.6% and 22.7-25.9% of standard length (Ref. 74421). Body deep and somewhat laterally compressed (Ref. 74421). Mouth terminal; upper jaw with three rows of premaxillary teeth; external row composed of two small median teeth with a small lateral cusp at their outer side; a median row with 6 or 7 teeth; and an inner row of 8 pluricuspid teeth with their cusp on a median row and without an anterior cusp or row of cusps as generally found in the other Bryconaethiops species (Ref. 74421). Lower jaw with an external series of 6 large pluricuspid teeth and an inner row of two median caniniform teeth (Ref. 74421). Lateral line scales 34-39; longitudinal line scales 36-40 (Ref. 74421). Head and body of live mature male specimens silvery with a pinkish hue on sides of the body; upper side of head green-olive; humeral spot present but not well marked; adipose-fin whitish transparent, blackish at base (Ref. 74421). After preservation, body yellowish white; darker above lateral line with scales above lateral line faintly dark brown on their basal part; fins whitish, transparent in overall appearance; humeral spot not well distinguishable, or even regularly absent (Ref. 74421).
Body shape (shape guide): fusiform / normal.
Ciclo vital y comportamiento de apareamiento
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Ibala Zamba, A., G. De Boeck, V. Mamonekene and E. Vreven, 2007. Rehabilitation of Bryconaethiops yseuxi Boulenger, 1899 (Characiformes: Alestidae) from the Congo River basin, Africa. J. Nat. Hist. 41(17-20):1213-1226. (Ref. 74421)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia 82804) |
PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high]. |
|
Bayesian length-weight
|
a=0.01072 (0.00489 - 0.02350), b=3.02 (2.84 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Nivel trófico (Referencia 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Resiliencia (Referencia 120179) |
Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.). |
Vulnerabilidad pesquera (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |