Advertisement

You can sponsor this page

Oreochromis macrochir  (Boulenger, 1912)

Longfin tilapia
Upload your photos and videos
Pictures | Google image
Image of Oreochromis macrochir (Longfin tilapia)
Oreochromis macrochir
Picture by de Vos, L.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335);  macrochir: From the Greek "macros" = big and the Greek "cheir" = hand, or pectoral fin in fishes, referring to the large pectoral fin (Ref. 52307).

Environment / Climate / Range Ecology

Freshwater; benthopelagic; depth range 5 - 14 m (Ref. 58302).   Tropical; 18°C - 35°C (Ref. 54042); 5°N - 25°S

Length at first maturity / Size / Weight / Age

Maturity: Lm 15.6, range 18 - 18 cm
Max length : 43.0 cm TL male/unsexed; (Ref. 54097)

Short description Morphology | Morphometrics

Dorsal spines (total): 15 - 17; Dorsal soft rays (total): 11-14; Anal spines: 3; Anal soft rays: 9 - 12; Vertebrae: 29 - 32. Diagnosis: head profile steep (Ref. 2, 7248, 12524, 13337, 33478, 52193, 54167) and rounded (Ref. 315, 12524). Toothed area of lower pharyngeal bone with broadly rounded lobes; scales on cheek in 2-3 rows; caudal scales variable, not on the inter-radial membranes except at the base, and never stiffening the fin (Ref. 2). Adults with black (Ref. 2, 12524) or dark brown flecks in the temporal region, on the gill-cover (Ref. 2, 11970) and below the eye, mostly associated with openings of the lateral line system (Ref. 2). Adults without conspicuous mid-lateral blotches (Ref. 2).

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

Africa: Kafue, upper Zambezi, and Congo River systems; introduced elsewhere in Africa and in Hawaiian Islands Also in the Okavango and Ngami region, Cunene basin, Chambezi and Bangweulu region (Ref. 5166).

Biology     Glossary (e.g. epibenthic)

Mating territory having a central volcano-shaped mound (Ref. 2, 246, 314, 5214, 12524, 55074) with a flat or slightly concave top, surrounded by a ditch and vallum, in contrast to O. mweruensis (Ref. 2). Prefers quiet, deep water associated with aquatic vegetation, but has been collected in other habitats as well (Ref. 12524, 13337). Found at temperatures between 18 and 35°C (Ref. 54042). Has a very low salinity tolerance (Ref. 2, 58). Occasionally forms schools, is mainly diurnal (Ref. 2). Feeds mostly on detritus (Ref. 87, 7248, 44661, 52193, 52307, 56192), (blue-green) algae (Ref. 12524, 13337, 44661) and diatoms (Ref. 246, 7248, 12524, 13337, 52193). Juvenile also accepts small invertebrates and zooplankton (Ref. 7248, 52193, 52307), but lose this tendency with age (Ref. 52307). Maternal mouthbrooder (Ref. 87, 246, 314, 5214, 7248, 8600, 12524, 13337, 36094, 52193, 54042). Flesh excellent (Ref. 5214).

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

Breeds in summer (Ref. 2, 7248, 52193). Males construct (Ref. 2, 13337) and defend (Ref. 2) a nest in shallowish waters (Ref. 2, 13337), which is a central volcano-shaped mound (Ref. 2, 314, 364, 5214, 13337, 55074) with a flat or slightly concave top which is the mating platform, surrounded by a ditch and vallum (groove and boundary wall) (Ref. 2). The cone is higher than the boundary wall of the territory (Ref. 2). Spawns in waters up to 150 cm deep, along banks of the lakes/river (Ref. 2). Males court several females in succession and females may mate with more than one male in a summer, so that large populations of young may build up (Ref. 5214). Several nests are often grouped into an arena (Ref. 5214, 7248, 36094, 52193).

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. 96402)

  Vulnerable (VU) (A3e)

CITES (Ref. 94142)

Not Evaluated

Threat to humans




Human uses

Fisheries: commercial; aquaculture: commercial; gamefish: yes
FAO(Aquaculture: production; ; publication : search) | FisheriesWiki | Sea Around Us

More information

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

Download XML

Internet sources

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=0.01549 (0.00905 - 0.02650), b=3.00 (2.86 - 3.14), based on LWR estimates for species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.1   ±0.0 se; Based on diet studies.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (K=0.23-1.0; tm<1).
Vulnerability (Ref. 59153):  Low to moderate vulnerability (35 of 100) .
Price category (Ref. 80766):   Unknown.