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> Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: nigrans: The specific epithet, nigrans, is a Latin adjective, meaning dark(ly) coloured (Ref. 85854).

Environment: milieu / climate zone / depth range / distribution range Ecologia

; Água doce bentopelágico. Tropical

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Africa: Lake Ejagham in Cameroon (Ref. 85854).

Tamanho / Peso / Idade

Maturity: L_m ? range ? - ? cm
Max length : 15.3 cm SL macho/indeterminado; (Ref. 85854)

Descrição breve Chaves de identificação | Morfologia | Morfometria

Espinhos dorsais (total) : 14 - 16; Raios dorsais moles (total) : 11 - 13; Espinhos anais: 3; Raios anais moles: 8 - 9. Diagnosis: Coptodon nigrans differs from all Tilapia sensu lato, and Coptodon, except for a few members, in quadricuspid to pentacuspid posterior pharyngeal teeth on lower pharyngeal jaw; quadricuspid teeth are known from C. tholloni, C. cameronensis, C. dageti, C. congica, C. deckerti, and partially from C. ejagham (Ref. 85854). It differs from C. cameronensis, C. ismailiaensis and C. dageti in longer lower jaw, 13.9-17.3% of standard length vs. 9.6-13.2%; from C. tholloni in longer snout length, 15.8-18.2% of standard length vs. 11.7-14.6%; from C. congica in lesser body depth, 34.9-40.2% of standard length vs. 41.5-49.2%; and from C. kottae in narrower interorbital width, 10.0-11.8% of standard length vs. 12.4-14.0% (Ref. 85854). Differences to C. deckerti are based on a combination of morphometric, life history, genetic and ecological data, e.g. in longer snout length, 15.8-18.2% vs. 12.7-15.6%, by breeding exclusively in excavated caves below 5 m water depth, vs. always breeding above 2 m; the smallest reproductvely active specimens of C. nigrans are larger than largest reproductively active C. deckerti specimen (Ref. 85854). it differs from C. ejagham in dark square-shaped blotches at base of each flank scale, filled or with a light coloured window at centre of blotch, vs. flank scales with a dark scale margin and a light centre, especially on scales below lateral line (Ref. 85854).

This species breeds exclusively in excavated caves below 5 m depth (Ref. 85854).

Life cycle and mating behavior Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas

Referência principal Upload your references | Referências | Coordenador : Kullander, Sven O. | Colaboradores

Dunz, A.R. and U.K. Schliewen, 2013. Molecular phylogeny and revised classification of the haplotilapiine cichlid fishes formerly referred to as "Tilapia". Mol. Phylogenet. Evol. 68(1):64-80. (Ref. 93285)

Categoria na Lista Vermelha da IUCN (Ref. 130435)

Criticamente ameaçada (CR) (B1ab(iii)+2ab(iii)); Date assessed: 09 March 2023

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para o homem

Harmless

Utilização humana

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Nível Trófico (Ref. 69278): 2.6 ±0.1 se; based on size and trophs of closest relatives

Resiliência (Ref. 120179): Elevada, tempo mínimo de duplicação da população menor que 15 meses (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Coptodon nigrans (Dunz & Schliewen, 2010)