Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Cichlidae
(Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
Environment / Climate / Range
Freshwater; brackish; benthopelagic; non-migratory. Tropical; 7°S - 12°S
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 18 - 22.5 cm
Max length : 23.8 cm SL male/unsexed; (Ref. 2)
Morphology | Morphometrics
(total): 15 - 17;
soft rays: 9 - 12;
Vertebrae: 30 - 32. Scales on cheek in 2-3 rows. Caudal scales variable, not on the inter-radial membranes except at the base; never stiffening the fin. Genital papilla large and tuberculate or scalloped, tasseled in breeding males. Generally lighter or darker olive-green. Breeding male iridescent dark green to blue-black on head, body and vertical fins; red edge to dorsal and caudal fins.
Africa: Lake Mweru and the swamps and saline lakes in Mweru-wa-Ntipa, the lower Luapula River system and the Lufira River (upper Congo River basin) in Democratic Republic of the Congo and Zambia (Ref. 2). Also reported from Lake Kivu in Rwanda (Ref. 46152).
Young O. macrochir mweruensis feed on epiphytic filamentous algae in swampy areas. Adults feed on bottom deposits, but those that migrated to the deeper northern end feed almost exclusively on plankton (Ref. 2).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Spawns along the banks of lakes/rivers at an average depth of 12 to 13 m. Mating territory largely occupied by a low mound with 6-12 grooves or crests radiating from the small central concave area (star-shaped nest). Males build the star-shaped nests on a sandy substrates.
Trewavas, E., 1983. Tilapiine fishes of the genera Sarotherodon, Oreochromis and Danakilia. British Mus. Nat. Hist., London, UK. 583 p. (Ref. 2)
IUCN Red List Status (Ref. 96402)
CITES (Ref. 94142)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01549 (0.00642 - 0.03734), b=3.00 (2.80 - 3.20), based on LWR estimates for this Subfamily-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.0 ±0.0 se; Based on diet studies.
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (tm=1).
Vulnerability (Ref. 59153
): Low vulnerability (20 of 100) .