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Micralestes acutidens (Peters, 1852)

Sharptooth tetra
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Image of Micralestes acutidens (Sharptooth tetra)
Micralestes acutidens
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Angola country information

Common names: Lubongo, Lutemba, Muka
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Present in the southern Congo River basin (Ref. 120641) in the Luembe and Luachimo systems (Kasai drainage, middle Congo River basin)(Ref. 11970). Also in the Cunene (Ref. 7248), Okavango and Zambezi River systems (Ref. 7248, 120641).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ao.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Poll, M., 1967
National Database:

Common names from other countries

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Characiformes (Characins) > Alestidae (African tetras)
Etymology: Micralestes: Greek, mikros = small + Greek,lestes = thief (Ref. 45335).
  More on author: Peters.

Environment: milieu / climate zone / depth range / distribution range Ökologie

; süßwasser pelagisch; pH range: 6.2 - 8.0; dH range: ? - 25; potamodrom (Ref. 51243).   Tropical; 22°C - 26°C (Ref. 1672)

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Africa: Congo, Okavango, Zambezi (Ref. 7248, 120641), Kunene and east coast rivers south to the Pongolo (Ref. 7248), Cross and Sanaga Rivers (Ref. 80290) and Tanzania (Ref. 4967). Nilo-Sudan and West-African reports of M. acutidens (e.g. Ref. 367, 51193) are misidentifications of M. elongatus (see DVD version of Ref. 81279; see also Ref. 2880).

Length at first maturity / Size / Gewicht / Alter

Maturity: Lm 3.4  range ? - ? cm
Max length : 9.0 cm SL Männchen/unbestimmt; (Ref. 4967); max. veröff. Gewicht: 2.00 g (Ref. 3799); max. veröff. Alter: 3.00 Jahre (Ref. 7248)

Kurzbeschreibung Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt): 0; Rückenflossenweichstrahlen (insgesamt): 10-11; Afterflossenstacheln 0; Afterflossenweichstrahlen: 17 - 20. Diagnosis: inner dentary teeth multicuspid; 14-17 anal fin branched rays; dorsal fin apical tip black; scales of flank without melanophores concentrated along basal margin, pigment diffuse or absent (Ref. 80290).

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Shoals in clear, flowing or standing, open water; appears to co-exist with the tigerfish Hydrocynus forskalii in open water although it is heavily preyed upon by that predator, particularly those shoals of tigerfish ranging up to 45 cm in length (Ref. 13337). Omnivorous, often feeding from surface waters on winged insects; also takes insect larvae, crustaceans and eggs and fry of other fish (Ref. 13337). Matures after a year; partial spawner of moderate fecundity, with usually fewer than 700 eggs per female; shoals migrate upstream after first summer rains; breeds throughout the summer months; used as forage fish and as bait for tigerfish and pike (Ref. 7248).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

Hauptreferenz Upload your references | Referenzen | Koordinator | Partner

Skelton, P.H., 1993. A complete guide to the freshwater fishes of southern Africa. Southern Book Publishers. 388 p. (Ref. 7248)

IUCN Rote Liste Status (Ref. 130435)

  nicht bedroht (LC) ; Date assessed: 30 April 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless




Nutzung durch Menschen

Fischereien: nicht kommerziell; Aquarium: Kommerziell; Köder: usually
FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.00684 - 0.02212), b=3.10 (2.94 - 3.26), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  2.9   ±0.33 se; based on food items.
Widerstandsfähigkeit (Ref. 120179):  hoch, Verdopplung der Population dauert weniger als 15 Monate. (K=0.63; tmax=3).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (23 of 100).