Distichodus atroventralis

Distichodus atroventralis Boulenger, 1898

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Distichodus atroventralis
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> Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Distichodus: Greek, di = two + Greek, stix, stichos = line, row (Ref. 45335).
More on author: Boulenger.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser pelagisch. Tropical

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Africa: widespread throughout Lower and Central Congo River basin in Democratic Republic of the Congo, Republic of Congo, Central African Republic and Angola (Ref. 96324, 122092), including Ubangui, Sangha and lower Kasai River systems (Ref. 122092). It has only been found in one locality in the Upper Congo, at Kabalo on the Lualaba River (Ref. 51906, 122092).

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 35.7 cm SL Männchen/unbestimmt; (Ref. 122092)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 22 - 24; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 13 - 14. Diagnosis: Distichodus atroventralis is distinguished from D. affinis, D. altus, D. decemmaculatus, D. noboli, D. notospilus and D. teugelsi by the higher number of lateral line scales, 61-71 vs. 37-46; from D. antonii by the inferior mouth vs. terminal, and a lower number of dark vertical bars, 6-9 vs. 9-14; from D. fasciolatus by the higher number of pelvic-fin rays, 11, exceptionally 10, vs. 10, exceptionally 11, the lower number of dark vertical bars, at least in specimens smaller than about 150 mm standard length, 6-9 vs. 13-20, and the blackish pelvic fin, at least in specimens smaller than about 200 mm standard length vs. whitish-yellow; from D. langi by fewer dorsal-fin rays, 22-24 vs. 26-28, a lower number of pectoral-fin rays, 17-20 vs. 21, a shallower head, 35-53% of head length vs. 67-69, and fewer dark vertical bars, 6-8 vs. 13; from D. lusosso by the inferior mouth vs. terminal, and the short snout vs. elongated; from D. maculatus by the absence of dark blotches all over the body vs. dark blotches all over the body; and from D. sexfasciatus by the higher number of teeth in the outer row of the upper and lower jaw, 18-36 and 20-34 vs. 12-14 on both jaws, and the greenish to light brown and yellowish body colouration vs. orange-reddish (Ref. 122092). It is distinguished from its most similar congener, D. kasaiensis, by having fewer dorsal-fin rays, 22-24 vs. 27-29, more teeth in the upper jaw, 18-36 vs. 15-25 (overlap due to positive allometry), and by having a shorter dorsal-fin base, 20.1-28.8% of standard length vs. 24.9-33.7% (overlap due to positive allometry); and from D. ingae by having fewer dorsal-fin rays, 22-24 vs. 26, and shorter dorsal fin, 12.0-21.9% of standard length vs. 23.6-24.2%, anal fin, 9.9-15.7% of standard length vs. 16.9-17.5%, and pectoral fin, 14.2-20.5% of standard length vs. 21.6-22.7% (Ref. 122092).
Body shape (shape guide): short and / or deep; Cross section: compressed.

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

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

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Moelants, T., J. Snoeks and E. Vreven, 2018. Distichodus kasaiensis and D. ingae, two new distichodontid species (Characiformes: Distichodontidae) from the Congo basin. Ichthyol. Explor. Freshwat. 28(2):177-192. (Ref. 122092)

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

  nicht bedroht (LC) ; Date assessed: 16 February 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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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].
Bayesian length-weight a=0.01445 (0.00605 - 0.03454), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
0
Anfälligkeit der Fischerei
(Ref. 59153) 		Low to moderate vulnerability (34 of 100). 🛈