Oreochromis schwebischi : aquaculture

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Oreochromis schwebischi (Sauvage, 1884)

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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
More on author: Sauvage.

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

Freshwater; benthopelagic. Tropical

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

Africa: present in the basins of the Ogooué, Nyanga, Kouilou-Niari and Chiloango, Gabon to Democratic Republic of the Congo (Ref. 2, 81260). Reports from Gambia and Senegal (Ref. 3538) and Guinea (4517) are doubtful and need confirmation (see Ref. 2, 81260). Also reported from the Cuanza (Angolan coastal) and the southern Congo River basin in Angola (Ref. 120641) but considered a Lower Guinea endemic in Ref. 81260; needs confirmation.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm SL male/unsexed; (Ref. 2)

Short description Morphology | Morphometrics

Dorsal spines (total): 14 - 16; Dorsal soft rays (total): 12-13; Anal spines: 3; Anal soft rays: 9 - 11; Vertebrae: 27 - 29. Diagnosis: scales of cheek in 2 or usually 3 horizontal rows; in mature males preorbital bone and jaws enlarged; upper profile of head often concave; outermost teeth bicuspid, and inner tricuspid in immature fishes and females, all becoming unicuspids in males; male genital papilla spade-shaped; margins of dorsal and caudal fins red in mature males (Ref. 2).

Biology     Glossary (e.g. epibenthic)

Occasionally territorial; stomachs contained algae, mainly unicellular or in short filaments (Ref. 2). Arena-spawning, exclusively maternal mouthbrooder with marked sexual dichromatism when sexually active (Ref. 81260).

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

Nests are made on sandy or loamy bottoms in water 40-80 cm deep, or more sparsely in depths of a meter or more; they are circular basins with a diameter of 115-185 cm, about 20 cm deep in the middle with a rim raised 7-8 cm above the surrounding level; spawning occurs at night, the fishes seeking deeper waters during the day to avoid high temperatures and intense illumination (Ref. 2). Reproduction is seasonal, usually taking place during the dry seasons from June to September and in February; can reach maturity at a size of 15 cm; breeding behavior is similar to that of its congeners (e.g. O. niloticus) (Ref. 52307).

Main reference Upload your references | References | Coordinator : Kullander, Sven O. | Collaborators

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. 130435)

  Least Concern (LC) ; Date assessed: 01 May 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Aquaculture: likely future use
FAO - Publication: search | FishSource |

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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

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=0.01905 (0.00827 - 0.04391), b=3.01 (2.82 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  2.0   ±0.00 se; based on food items.
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (27 of 100).
Nutrients (Ref. 124155):  Calcium = 17.8 [7.3, 94.0] mg/100g; Iron = 1.31 [0.55, 3.16] mg/100g; Protein = 17.5 [15.7, 19.4] %; Omega3 = 0.309 [0.111, 0.905] g/100g; Selenium = 80.7 [27.5, 182.4] μg/100g; VitaminA = 14.6 [2.7, 69.2] μg/100g; Zinc = 1.92 [1.01, 4.57] mg/100g (wet weight);