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Clarias pachynema  Boulenger, 1903

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Clarias pachynema   AquaMaps   Data sources: GBIF OBIS
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Clarias pachynema
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Siluriformes (Catfish) > Clariidae (Airbreathing catfishes)
Etymology: Clarias: Greek, chlaros = lively, in reference to the ability of the fish to live for a long time out of water.   More on author: Boulenger.

Environment / Climate / Range Ecology

Freshwater; demersal.   Tropical, preferred ?; 6°N - 7°S

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: from the coastal rivers of south Cameroon (up to the Sanaga river) southwards to the Ogooué system in Gabon and the middle Congo basin in the Democratic Republic of the Congo (Ref. 78218). Also reported from the Lualaba/upper Congo (Ref. 106245). Also in the Kouilou-Niari in Republic of Congo (Ref. 92841). Further also reported from the Niger Delta (Ref. 57129) and Cross River in Nigeria (Ref. 31256, 57129) and from the Chad (Ref. 13331). Report from the Oueme in Benin needs confirmation (Ref. 57129, 81644).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 35.6 cm TL male/unsexed; (Ref. 57129)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 81-95; Anal spines: 0; Anal soft rays: 63 - 76; Vertebrae: 65 - 67. Diagnosis: head pointed in dorsal outline; snout short; tooth plates small; eyes dorsally located; "dermosphenotic" and supraorbital bones joined in specimens over 80 mm SL (Ref. 248). Frontal fontanella long and narrow ("knife-shaped")(Ref. 248, 57129). Occipital process long and oval-shaped (Ref. 248). Distance between occipital process and dorsal-fin base 4.3-10.5% SL (m = 8.1). Gill rakers long, slender and distantly set; suprabranchial organ well developed (Ref. 248). Pectoral spine serrated on both sides; 65-67 vertebrae (Ref. 57129). Coloration: no information on colour in life (Ref. 57129). Preserved specimens uniformly dark brown on back and sides, and yellowish-brown on belly; vertical series of small white spots on flanks (Ref. 57129).

Biology     Glossary (e.g. epibenthic)

Nothing is known on the biology and reproduction of this species (Ref. 78218).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Teugels, G.G., 1986. A systematic revision of the African species of the genus Clarias (Pisces; Clariidae). Ann. Mus. R. Afr. Centr., Sci. Zool., 247:199 p. (Ref. 248)

IUCN Red List Status (Ref. 109396)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries:
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00336 - 0.01560), b=2.99 (2.82 - 3.16), based on LWR estimates for this Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.5   ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low to moderate vulnerability (28 of 100) .
Price category (Ref. 80766):   Unknown.