Chrysichthys nigrodigitatus, Belly up : fisheries, aquaculture, gamefish

Chrysichthys nigrodigitatus (Lacepède, 1803)

Belly up
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Chrysichthys nigrodigitatus
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Klassificering / Namn Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | 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).

Miljö: miljö / Klimatzon / djupintervall / distributionsområde Ekologi

; sötvatten bottenlevande; flodvandrande (Ref. 51243); djupintervall 3 - ? m (Ref. 13851). Tropical; 22°C - 28°C (Ref. 12468); 15°N - 13°S, 16°W - 30°E

Utbredning Territorier | FAO områden | Ekosystem | Förekomster | Prickkarta | Utplanteringar | 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).

Längd vid första mognad / Storlek / Vikt / Ålder

Könsmognad: Lm ?, range 14 - ? cm
Max length : 65.0 cm SL hane/ej könsbestämd; (Ref. 81642)

Kort beskrivning Bestämningsnycklar | Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt) : 2; Mjukstrålar i ryggfenan (totalt) : 6; Taggstrålar i analfenan: 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.

Biologi     Ordlista (t.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).

Livscykel och parningsbeteende Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver

Huvudreferens Ladda upp dina referenser | referenser | Koordinator | Medarbetare

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)

Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))

  Least Concern (LC) ; Date assessed: 30 April 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Hot mot människor

  Harmless





Mänskliga användningsområden

Fiskeri: mindre kommeriell; Vattenbruk: kommersiell; sportfisk: ja
FAO - Vattenbrukssystem: production searchfiskeri: landings search; Publication: search | FishSource |

Ytterligare information

Trofisk ekologi
Livsmedelsartiklar (preys)
Födosammansättning
Födointag
Matransoner
Predatorer
Ekologi
Ekologi
Populationsdynamik
Tillväxtparametrar
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Rekrytering
Abundans
Livscykel
Reproduktion
Könsmognad
Mognad/Gills rel.
Fekunditet
Lek
Lekande aggregat
Ägg
Utveckling av ägg
Larver
Larvdynamik
Utbredning
Territorier
FAO områden
Ekosystem
Förekomster
Utplanteringar
BRUVS - Videor
Anatomi
Gälyta
Hjärna
Otolit
Fysiologi
Kroppssammansättning
Näringsämnen
Syreförbrukning
Typ av simning
Simhastighet
Visuella pigment
Ljud från fisk
Sjukdomar & Parasiter
Toxicitet (LC50)
Genetik
Genom
Genetik
Heterozygositet
Ärftlighet
Genetisk mångfald
Människorelaterad
Vattenbrukssystem
Vattenbruksprofiler
Avelslinjer
Ciguatera-fall
Frimärken, mynt, diverse.
Uppsökande verksamhet
Medarbetare
referenser
referenser

Verktyg

Särskilda rapporter

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Internet-källor

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Släkte, Arter | DiscoverLife | ECOTOX | FAO - Vattenbrukssystem: production searchfiskeri: 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 | Offentliga akvarier | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, sök | World Records Freshwater Fishing | Zoologiskt register

Uppskattningar baserade på modeller

Index för fylogenetisk mångfald
(Ref. 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).
Trofisk nivå
(Ref. 69278)
3.2   ±0.41 se; based on food items.
Resiliens
(Ref. 120179)
Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (K=0.12-0.65; Fec = 3,086-28,086).
Sårbarhet i fisket
(Ref. 59153)
Low to moderate vulnerability (32 of 100). 🛈
Priskategori
(Ref. 80766)
Unknown.
Näringsämnen
(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);