>
Characiformes (Characins) >
Alestidae (African tetras)
Eponymy: François-Romain Thollon (1855–1896) was a French botanist and collector who resigned (1882) from MNHN Paris to work in the Congo and as a member of the de Brazza mission in Gabon. [...] (Ref. 128868), visit book page.
More on author: Pellegrin.
Taxonomic Remarks
Affinities: close to B. bartoni, B. longipennis, B. derhami and B. intermedius; distinguished from the first three species by higher number of scales above lateral line and from B. intermedius by a higher number of branched anal rays and lateral line scales (Ref. 80920). This species is placed in the genus Alestes in Eschmeyer (CofF ver. May 2011: Ref. 86870).
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce pelagico. Tropical
Africa: Lower Guinea endemic, found in Gabon and the Republic of Congo in the upper Ogowe, Nyanga and Kouilou River basins (Ref. 80290).
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 8.9 cm SL maschio/sesso non determinato; (Ref. 80290)
Diagnosis: fronto-parietal fontanel narrow but always present; head length/snout length 3.4-3.6; 34-38 lateral line scales; 6.5 scales between lateral line and dorsal fin; 11-11.5 predorsal scales; 22-25 anal fin branched rays; 13-14 gill rakers on lower limb of first gill arch; 6 teeth in outer premaxillary row; humeral spot present (Ref. 80290).
Body shape (shape guide): fusiform / normal.
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Paugy, D. and S.A. Schaefer, 2007. Alestidae. p. 347-411. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) Poissons d'eaux douces et saumâtres de basse Guinée, ouest de l'Afrique centrale/The fresh and brackish water fishes of Lower Guinea, west-central Africa. Vol. 1. Coll. Faune et Flore tropicales 42. Istitut de recherche pour le développement, Paris, France, Muséum nationale d'histoire naturelle, Paris, France and Musée royale de l'Afrique centrale, Tervuren, Belgique. 800 p. (Ref. 80290)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio. 82804) |
PD50 = 0.5156 [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). |
Livello trofico (Fonte Biblio. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Resilienza (Fonte Biblio. 120179) |
Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.). |
Vulnerabilità della pesca (Ref. 59153) |
Low vulnerability (11 of 100). 🛈 |