Chrysichthys nigrodigitatus, Belly up : fisheries, aquaculture, gamefish

Chrysichthys nigrodigitatus (Lacepède, 1803)

Belly up
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Chrysichthys nigrodigitatus
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Classification / Noms Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Siluriformes (Catfishes) > Claroteidae (Claroteid catfishes)
Etymology: Chrysichthys: Greek, chrysos = golden + Greek, ichthys = fish (Ref. 45335).
More on author: Lacepède.

Taxonomic Remarks
The species Chrysichthys furcatus Günther, 1864 is considered valid in Eschmeyer (CofF ver. Mar. 2012: Ref. 89686). It is treated here a synonym of Chrysichthys nigrodigitatus (Lacepède, 1803) following Risch (1992: Ref. 7324), Risch (2003: Ref. 57126) and Geerinckx et al. (2007: Ref. 81642).

Environnement : milieu / zone climatique / profondeur / gamme de distribution Écologie

; eau douce démersal; potamodrome (Ref. 51243); profondeur 3 - ? m (Ref. 13851). Tropical; 22°C - 28°C (Ref. 12468); 15°N - 13°S, 16°W - 30°E

Distribution Territoires | Zones FAO | Écosystèmes | Occurrences | Carte par point | Introductions | Faunafri

Africa: Senegal to Cabinda, Angola (Ref. 3236, 81642). To the north also reported from Mauritania (Ref. 55783), southwards down to the lower Congo River (Ref. 1879) and Angolan coastal rivers (Ref. 120641).

Longueur à la première maturité / Taille / Poids / Âge

Maturité: Lm ?, range 14 - ? cm
Max length : 65.0 cm SL mâle / non sexé; (Ref. 81642)

Description synthétique Clés d'identification | Morphologie | Morphométrie

Épines dorsales (Total) : 2; Rayons mous dorsaux (Total) : 6; Épines anales: 0. Diagnosis: recognized by its pointed snout, the rather small mouth, and the width of the premaxillary tooth plate (1/5-1/3.5, usually 1/4, of head length); vomerine dentition represented by a square to rectangular tooth plate which begins to develop at sizes between 60 and 70 mm standard length; palatine dentition developing at sizes over 100 mm standard length, initially as isolated teeth; second or third branched dorsal-fin ray always the longest; upper caudal-fin lobe much longer than lower lobe; gill rakers long and smooth; other characters, such as length of dorsal fin, number of branched rays in anal fin, and number of gill rakers on first gill arch, are subject to intraspecific variations; sexually mature males and (some) ripe females show considerable morphological differences; such specimens have often been labelled as Chrysichthys furcatus; maturity occurs probably at a rather advanced stage (at over 200 mm SL) and leads to the inflation of head, broadening of mouth and premaxillary tooth plate, shortening of spines and overgrowth of fin-spines by thick skin, the fins becoming more rounded, and the caudal-fin lobes sometimes becoming subequal; the body acquires an emaciated, thinned down appearance (Ref. 57126, 81642). Characters only clear in mature males in reproduction: adipose fin short, base contained 8-11 times in SL and measuring 28-64% of distance between dorsal fin and adipose fin; maxillary barbel not reaching beyond dorsal spine when extended; head swollen; skin mucous; spines thick and covered with skin (Ref. 81642).
Body shape (shape guide): elongated.

Biologie     Glossaire (ex. epibenthic)

Adults occur in shallow waters of lakes (less than 4 m), over mud and fine sand bottom. Omnivorous, feed on seeds, insects, bivalves and detritus (Ref. 13851). Feeding becomes specialized with age and size, larger fish may feed on decapods and fish (Ref. 27935).

Cycle de vie et comportement reproducteur Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Téléchargez vos références | Références | Coordinateur | Collaborateurs

Risch, L. and E.J. Vreven, 2007. Claroteinae. p. 607-629. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) The fresh and brackish water fishes of Lower Guinea, West-Central Africa. Volume I. Collection Faune et Flore tropicales 42. Institut de Recherche pour le Développement, Paris, France, Muséum National d’Histoire Naturelle, Paris, France, and Musée Royal de l’Afrique Centrale, Tervuren, Belgium. 800 pp. (Ref. 74659)

Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))

  Préoccupation mineure (LC) ; Date assessed: 30 April 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

Pêcheries: intérêt commercial mineur; Aquaculture: commercial; pêche sportive: oui
FAO - Systèmes d'aquaculture: production searchpêcheries: landings search; Publication: search | FishSource |

Plus d'informations

Écologie trophique
Aliments (proies)
Composition du régime alimentaire
Consommation alimentaire
Rations alimentaires
Prédateurs
Écologie
Écologie
Cycle de vie
Reproduction
Maturité
Maturité/épines rel.
Fécondité
Frai
Agrégats de frai
Œufs
Développement de l'œuf
Larves
Dynamique des populations larvaires
Distribution
Territoires
Zones FAO
Écosystèmes
Occurrences
Introductions
BRUVS - Vidéos
Anatomie
Surface branchiale
Cerveau
Otolithe
Physiologie
Composition corporelle
Nutriments
Consommation d'oxygène
Type de natation
Vitesse de nage
Pigments visuels
Son de poisson
Maladies et parasites
Toxicité (CL50)
Génétique
génôme
Génétique
Hétérozygotie
Héritabilité
Diversité génétique
Liées à l'homme
Systèmes d'aquaculture
Profils d'aquaculture
Souches
Cas de ciguatera
Timbres, pièces de monnaie, divers
Sensibilisation
Collaborateurs
Références
Références

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Sources Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Systèmes d'aquaculture: production searchpêcheries: landings search; Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | Aquariums publics | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoological Record

Estimations basées sur des modèles

Indice de diversité phylogénétique
(Réf. 82804)
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.01000 (0.00801 - 0.01249), b=2.96 (2.91 - 3.01), in cm total length, based on LWR estimates for this species (Ref. 93245).
Niveau trophique
(Réf. 69278)
3.2   ±0.41 se; based on food items.
Résilience
(Réf. 120179)
Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (K=0.12-0.65; Fec = 3,086-28,086).
Vulnérabilité de la pêche
(Ref. 59153)
Low to moderate vulnerability (32 of 100). 🛈
Catégorie de prix
(Ref. 80766)
Unknown.
Nutriments
(Ref. 124155)
Calcium = 119 [71, 233] mg/100g; Iron = 1.48 [0.88, 2.35] mg/100g; Protein = 16.8 [15.8, 17.9] %; Omega3 = 0.272 [0.115, 0.642] g/100g; Selenium = 87.9 [39.6, 223.6] μg/100g; VitaminA = 18.6 [7.7, 43.8] μg/100g; Zinc = 1.4 [1.0, 2.0] mg/100g (wet weight);