Nigeria country information

Common names: Durukulli, Ezwagi, Marushe
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: commercial | Ref: Anonymous, 1998
Aquaculture: commercial | Ref: FAO, 1997
Regulations: | Ref:
Uses: live export: yes;
Comments: Widely distributed (Ref. 31256). Known from the Ogun River (Ref. 13331, 57126), lower Niger, Benue, Niger Delta (Ref. 57126), Afikpo on Ehoma Floodplain (Ref. 52861) and Cross River (Ref. 57126, 85170). Exploited commercially in Kainji Lake (Ref. 28265). Also Ref. 3236, 3799.
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/ni.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Risch, L.M., 2003
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Siluriformes (Catfish) > Claroteidae (Claroteid catfishes) > Claroteinae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Catfish, Mâchoiron, Korsie, ... more

Issue
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).

Main reference

Risch, L. and E.J. Vreven. 2007. (Ref. 74659)
References | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 65.0 cm SL male/unsexed; (Ref. 3236)

Length at first maturity
L_m ?, range 14 - ? cm

Environment

Freshwater; demersal; potamodromous (Ref. 51243); depth range 3 - ? m (Ref. 13851)

Climate / Range

Tropical; 22°C - 28°C (Ref. 12468), preferred ?; 15°N - 13°S, 16°W - 30°E

Distribution

Africa: Senegal to Cabinda, Angola (Ref. 3236). Reported from Mauritania (Ref. 55783). Also present in the lower Congo River (Ref. 1879).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 2; Dorsal soft rays (total): 6; Anal spines: 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 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 appearance (Ref. 57126).

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).

IUCN Red List Status (Ref. 115185)

Least Concern (LC)

Threat to humans

Harmless

Human uses

Fisheries: minor commercial; aquaculture: commercial; gamefish: yes; aquarium: public aquariums

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance

References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion

Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

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Summary page | Point data | Common names | Photos

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.2 ±0.41 se; Based on food items.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.12-0.65; Fec = 3,086-28,086)

Vulnerability (Ref. 59153)
High vulnerability (60 of 100)

Price category (Ref. 80766)
Unknown

Chrysichthys nigrodigitatus (Lacepède, 1803)