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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.
Issue
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).
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water pelagisch. Tropical
Africa: Lower Guinea endemic, found in Gabon and the Republic of Congo in the upper Ogowe, Nyanga and Kouilou River basins (Ref. 80290).
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 8.9 cm SL mannelijk / geslacht onbekend; (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).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
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)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
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=0.01122 (0.00496 - 0.02540), b=3.01 (2.83 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.1 ±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).
