Alestes baremoze, Silversides : fisheries

Alestes baremoze (Joannis, 1835)

Silversides
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Alestes baremoze
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Classificatie / Namen Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Characiformes (Characins) > Alestidae (African tetras)
Etymology: Alestes: Greek, alestes, -oy = miller (Ref. 45335).

Taxonomic Remarks
Three subspecies were described on the basis of different morphological characters: tchadense Blache, 1964, soudanensis and eburneensis Paugy, 1986. However they should rather be considered as populations having equivalent ecological characteristics (D. Paugy, pers,comm 21 Mar. 2013).

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water benthopelagisch; pH range: 6.5 - 7.8; dH range: ? - 30; potamodroom (Ref. 138143). Tropical; 15°C - 35°C

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

Africa: Senegal, Gambia, the coastal basins of the Côte d'Ivoire (Comoé, Bandama and Sassandra), Volta, Niger/Benué and Chad basin (Ref. 2880, 81279). Also present in Nile, Omo, Lake Albert and Lake Turkana (Ref. 2880, 28714). Three populations - previously as subspecies - may be distinguished by slight morphological differences but they have the same ecological charasterics: in Nile River, Lake Albert, Omo River and Lake Turkana ('baremoze'); in Senegal River, Gambia River, Tominé River, Volta basin, Niger basin and Chad basin ('soudaniensis'); in coastal basins of Côte d'Ivoire, namely Sassandra River, Bandama River and Comoé River ('eburneensis') (Ref. 42019).

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturiteit: Lm 20.9, range 25 - ? cm
Max length : 43.0 cm TL mannelijk / geslacht onbekend; (Ref. 2703); 40.0 cm TL (female); max. gepubliceerd gewicht: 500.00 g (Ref. 3023); max. gerapporteerde leeftijd: 6 Jaren (Ref. 2758)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 10; Anale stekels: 0; Anale zachte stralen: 22 - 31; Wervels: 41 - 49. Diagnosis: at least 30 gill rakers on lower limb of first gill arch (30-41); 38-51 lateral line scales, with 7.5-9.5 above and 3.5 below; anal fin with three simple rays and 19-28 branched rays; dorsal-fin origin distinctly behind level of pelvic-fin insertions (Ref. 2759, 81279).
Body shape (shape guide): fusiform / normal; Cross section: oval.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Mainly diurnal. There is considerable flexibility in its diet, A. baremoze shifts from zooplankton to zoobenthos, detritus and macrophytes as plankton densities decline (Ref. 28714). Adults are found at a temperature range of 14.6-35.0°C. In the Malamfatori area (Tchad), seine-net fishery on the River Yobe depends on seasonal upstream (from Lake Chad) and downstream migration during the flood (August-December) and dry (January-March) seasons, respectively. Also, there is an intensive gillnet fishery from July-October at the river mouth. A. baremoze moves offshore (in Lake Chad) beginning March.

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

Spawning cycle from Tables XVI-XVIII of Ref. 2759 for maturity stages 3-4 GSI 1.5-16% from deltaic zone, upstream (Logone-Chari River), downstream (N'Djamena) and in the southeastern archipelago of Lake Chad. Spawning takes place from 16:30-20:00 h. Eggs spawned in one batch representing 15% of weight of female. Mature females dispersed, not forming groups.

Hoofdreferentie Upload uw referenties | Referenties | Coördinator | Medewerkers

Teugels, G.G., C. Lévêque, D. Paugy and K. Traoré, 1988. État des connaissances sur la faune ichtyologique des bassins côtiers de Côte d'Ivoire et de l'ouest du Ghana. Rev. Hydrobiol. Trop. 21(3):221-237. (Ref. 272)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Niet bedreigd (LC) ; Date assessed: 15 June 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

Visserij: van groot commercieel belang
FAO - Publication: search | FishSource |

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804)
PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.01047 (0.00839 - 0.01307), b=3.02 (2.96 - 3.08), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trofisch niveau
(Ref. 69278)
3.1   ±0.35 se; based on food items.
Generation time 1.6 (1.3 - 2.6) years. Estimated as median ln(3)/K based on 10 growth studies.
Weerstandsvermogen
(Ref. 120179)
Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (K=0.42; tm=2-3; tmax=6).
Kwetsbaarheid van de visserij
(Ref. 59153)
Low vulnerability (22 of 100). 🛈
Prijsklasse
(Ref. 80766)
Unknown.
Voedingsstoffen
(Ref. 124155)
Calcium = 104 [37, 225] mg/100g; Iron = 1.52 [0.79, 3.43] mg/100g; Protein = 18.4 [16.4, 20.5] %; Omega3 = 0.458 [0.176, 1.204] g/100g; Selenium = 85.2 [36.2, 188.1] μg/100g; VitaminA = 29.9 [11.8, 71.1] μg/100g; Zinc = 1.79 [1.29, 2.49] mg/100g (wet weight);