Enteromius oraniensis, Orange River chubbyhead

Enteromius oraniensis (Barnard, 1943)

Orange River chubbyhead
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drawing shows typical species in Cyprinidae.

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

> Cypriniformes (Carps) > Cyprinidae (Minnows or carps) > Smiliogastrinae
Etymology: Enteromius: Greek, enteron = intestine + Greek, myo, mys = muscle (Ref. 45335)oraniensis: Named for its type locality, the Orange River system to which the species is endemic; noun in apposition,.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser benthopelagisch. Subtropical

Verbreitung Territorien | FAO Gebiete | Ökosysteme | Vorkommen | Punkt Karte | Einführungen | Faunafri

Africa: South Africa (Orange River system).

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 8.5 cm TL Männchen/unbestimmt; (Ref. 93592)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

This species is distinguished by a lateral line that is incomplete (2-33; mode 15) and oral barbels that are inconspicuous (Ref. 124213).
Cross section: compressed.

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

Reports on extensive studies of the biology and ecology of this species, were mainly focused on populations from Lake Le Roux in the Orange River system. The species occurs in a number of habitats ranging from tributaries to mainstem sections of rivers and man-made impoundments where it is usually associated with vegetated areas. Observed early maturation in the first year of life, high reproductive effort, having multiple clutches per year and rapid growth rate are important traits that makes this species highly adaptable to habitats that are prone to regular input of high silt loads and experience extreme variation in flow regimes, ranging from devastating floods to erratic flows. Reported spawning events occur following the onset of rainfall in summer, where fish spawn locally, although spawning migration has been occasionally observed, with adhesive eggs laid in flooded marginal vegetation, This species has early maturity (attains 4.0 cm FL in first year), high reproductive rate (a female of 6.3 cm can have up to 3250 eggs) and a protracted reproductive season (up to 6 months) with individuals able to have multiple clutches. These traits allow survival in the dryland southern tributaries of the Orange River system that drain the Great Karoo (Ref. 124213).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

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Kambikambi, M.J., W.T. Kadye and A. Chakona, 2021. Allopatric differentiation in the Enteromius anoplus complex in South Africa, with the revalidation of E. cernuus and E. oraniensis, and description of a new species, E. mandelai (Teleostei: Cyprinidae). J. Fish Biol. 99(3):931-954. (Ref. 124213)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2)


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: nicht kommerziell
FAO - Publication: search | FishSource |

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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Trophische Ebene (Ref. 69278):  3.0   ±0.3 se; based on size and trophs of closest relatives
Widerstandsfähigkeit (Ref. 120179):  hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Anfälligkeit der Fischerei (Ref. 59153):  Low vulnerability (10 of 100). 🛈