Brachyalestes ferox, Large-toothed Lake Turkana robber

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Brachyalestes ferox (Hopson & Hopson, 1982)

Large-toothed Lake Turkana robber
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Brachyalestes ferox
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Classificatie / Namen Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Characiformes (Characins) > Alestidae (African tetras)

Environment: milieu / Klimaatzone / Diepte / distribution range Ecologie

; zoet water pelagisch. Tropical

Verspreiding Landen | FAO regio's | Ecosystemen | Voorkomen | Verspreidingskaart | Introducties | Faunafri

Africa: endemic to Lake Turkana, Kenya (Ref. 52331, 53378).

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 8.1 cm SL mannelijk / geslacht onbekend; (Ref. 52331)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

It has sharply pointed fang-like teeth and a muzzle-like prognathous snout (Ref. 53378). Pale fawn with silvery scales, darker on the dorsal surface (Ref. 53378). Both lobes of the caudal fin marked with red chromatophores on the lower lobe (Ref. 53378). The dorsal surface is lightly patterned with melanophores in preserved specimens, heavier in a band on the middorsal line (Ref. 53378). Characteristic patches of black pigment are present on the snout, on the lower jaw and on the mid-lateral portion of the caudal peduncle (Ref. 53378). Distal margin of caudal fin with broad edging of black pigment (Ref. 53378).
Body shape (shape guide): fusiform / normal.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Pelagic, restricted to offshore waters; feeds chiefly on prawns, zooplankton and insects with an increasing proportion of small fish in larger individuals; spawns within lake; dominant species in terms of standing stock in Lake Turkana (Ref. 53378).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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Hopson, A.J. and J. Hopson, 1982. The fishes of Lake Turkana with a description of three new species: Alestes ferox sp. nov., Alestes minutus sp. nov. (Pisces: Characidae) and Barbus turkanae sp. nov. (Pisces: Cyprinidae). p. 283-347. In A.J. Hopson (ed.) Lake Turkana. A report on the findings of the Lake Turkana project 1972-1975. Overseas Development Administration, London. 1873 p. (Ref. 53378)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-1)

  Kwetsbaar (VU) (B1ab(i,ii,iii,v)); Date assessed: 05 July 2022

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

FAO - Publication: search | FishSource |

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 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):  3.2   ±0.4 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). 🛈