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Alestes dentex  (Linnaeus, 1758)

Characin
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Alestes dentex
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

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

Environment / Climate / Range Ecology

Freshwater; pelagic; pH range: 6.0 - 6.5; dH range: 4 - 18; potamodromous (Ref. 51243).   Tropical; 24°C - 27°C (Ref. 13371)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: Chad, Niger, Volta, Gambia, Senegal (Ref. 2880, 81279). Outside West Africa this species is found in the Nile, Lake Mobutu Sese Seko [=Lake Albert] and Omo-Lake Turkana system (Ref. 2880). Also known from the White Nile, Murchinson Nile and Blue Nile (Ref. 5331).

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 22 - ? cm
Max length : 55.0 cm TL male/unsexed; (Ref. 2880); max. published weight: 600.00 g (Ref. 3799); max. reported age: 7 years (Ref. 2758)

Short description Morphology | Morphometrics

Anal spines: 0; Anal soft rays: 21 - 26; Vertebrae: 45 - 48. Diagnosis: at most 27 gill rakers on lower limb of first gill arch (18-27); 3 unbranched and 18-23 branched anal-fin rays; 43-51 lateral line scales; dorsal-fin origin distinctly behind level of pelvic-fin insertions (Ref. 2880, 81279).

Biology     Glossary (e.g. epibenthic)

Two subspecies: Alestes dentex dentex in the Nile and Alestes dentex sethente (Valenciennes, 1849) in Sudanian basins of West Africa. Omnivorous, stomachs examined contained seeds, zooplankton, insects or fish fry (Ref. 28714).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Up to 300 eggs are scattered on the bottom. Larvae hatch after about 6 days.

Main reference Upload your references | References | Coordinator | Collaborators

Paugy, D., 1990. Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

Countries
FAO areas
Ecosystems
Occurrences
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Ecology
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Common names
Synonyms
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Predators
Ecotoxicology
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Spawning
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Eggs
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Age/Size
Growth
Length-weight
Length-length
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Morphometrics
Morphology
Larvae
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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.00 (2.82 - 3.18), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.9   ±0.37 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (tmax=7; tm=2; K=0.43-.075).
Prior r = 1.08, 2 SD range = 0.82 - 1.43, log(r) = 0.08, SD log(r) = 0.14, Based on: 2 K, 1 tgen, 1 tmax, records
Vulnerability (Ref. 59153):  Low to moderate vulnerability (31 of 100) .
Price category (Ref. 80766):   Unknown.