Hepsetus microlepis

Hepsetus microlepis (Boulenger, 1901)

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Hepsetus microlepis
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> Characiformes (Characins) > Hepsetidae (African pikes)
Etymology: Hepsetus: Greek, epsetas, -e, -on = boiled, but there is the following sentence: "oí epsetoi" = certain fishes, and also could be related to "psetta" = grouper (Ref. 45335).

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water benthopelagisch. Tropical

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Africa: widespread in the lower and middle Congo River basin, excluding the southern part of the Kasai and the Dja; and just upstream of Wagenia rapids in Kisangani (Ref. 108775). Also in the Gribingui River (Lake Chad basin) in Central African Republic (Ref. 108775).

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 30.5 cm SL mannelijk / geslacht onbekend; (Ref. 124477)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Wervels: 39 - 40. Diagnosis: Hepsetus microlepis is distinguished from H. occidentalis by a larger internasal distance, 23-31% of head length vs. 20-25%, and smaller nostril-lower jaw distance, 35-44% of head length vs. 40-48%, both positively allometric characters; it is distinguished from H. odoe by a generally higher number of lateral line scales, 47-60 vs. 43-51, and by a uniform body colour vs. a vague stripe pattern from the adipose fin to the caudal fin; it is distinguished from H. kingsleyae by a greater internasal distance, 23-31% of head length vs. 16-23%, and a greater head width, 32-46% of head length vs. 26-36%, which are both positively allometric; it is distinguished from H. lineatus by a combination of characters: a higher number of epibranchial gill rakers on the first gill arch, 4-9, exceptionally 13, vs. 0-6, and a smaller distance between dorsal and adipose fin, 9.2-12.8% of standard length vs. 12.6-16.4%; Hepsetus microlepis also has a uniform body colour, whereas H. lineatus has a prominent stripe on its flanks; Hepsetus microlepis is distinguished from H. cuvieri by a higher number of gill rakers on the first arch, 13-14 vs. 8-13, and by a greater head width, 32-46% of head length vs. 29-40%, and also a greater internasal distance, 23-31% of head length vs. 19-26%, with the latter two being positively allometric (Ref. 108775).
Body shape (shape guide): elongated.

Biologie     Verklarende woordenlijst (bv. epibenthic)

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

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Decru, E., J. Snoeks and E. Vreven, 2015. Taxonomic evaluation of the Hepsetus from the Congo basin with the revalidation of H. microlepis (Teleostei: Hepsetidae). Ichthyol. Explor. Freshwat. 26(3):273-287. (Ref. 108775)

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


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804)
PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00661 (0.00345 - 0.01265), b=3.20 (3.03 - 3.37), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trofisch niveau
(Ref. 69278)
3.0   ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen
(Ref. 120179)
Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Kwetsbaarheid van de visserij
(Ref. 59153)
Low to moderate vulnerability (33 of 100). 🛈