Tanzania country information

Common names: Wami tilapia
Occurrence: endemic
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from coastal Tanzania rivers and islands (Ref. 118630), including Kingani River [= Ruvu River] (Ref. 2, 118638), Lake Mansi (Ref. 118630), Wami River (Ref. 2, 118638), Rufiji River and its tributaries Kilombero and Great Ruaha below the Mtera Dam (Ref. 2, 118638), and Mbwemburu River (Ref. 2). Populations in Zanzibar and Pemba may be native, although there may also have been some stocking from the mainland (Ref. 2, 4537, 118638).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/tz.html
National Fisheries Authority: http://www.isp.msu.edu/AFRICANSTUDIES/PLEA/TAFIRI.HTM
Occurrences: Occurrences Point map
Main Ref: Shechonge, A., B.P. Ngatunga, S.J. Bradbeer, J.J. Day, J.J. Freer, A.G.P. Ford, J. Kihedu, T. Richmond, S. Mzighani, A.M. Smith, E.A. Sweke, R. Tamatamah, A.M. Tyers, G.F. Turner and M.J. Genner, 2018
National Database:

Common names from other countries

Redeyed tilapia, Rufigi tilapia, Tilapia de Zanzibar, ... more

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

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

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

; sötvatten; brackvatten bentopelagisk; djupintervall 1 - ? m (Ref. 5723). Tropical; 22°C - 28°C (Ref. 2059); 5°S - 10°S

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Africa: most of the Rufiji River and its tributaries, Kingani [= Ruvu] River, Mbwenkuru River and Wami River, all in Tanzania (Ref. 2, 118630, 118638). Populations in Zanzibar and Pemba may be native, although there may also have been some stocking from the mainland (Ref. 118638).

Size / Vikt / Age

Maturity: L_m ? range ? - ? cm
Max length : 44.0 cm SL hane/ej könsbestämd; (Ref. 4967)

Short description Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt): 15 - 18; Mjukstrålar i ryggfenan (totalt): 11-14; Taggstrålar i analfenan 3; Mjukstrålar i analfenan: 9 - 12; Ryggkotor: 29 - 30. Diagnosis: A large, deep-bodied species; mature males develop enlarged jaws and a concave head profile (Ref. 2, 118638). Other distinguishing characters of this species include: vertebrae 29-30; dorsal spines XV-XVIII, total dorsal rays 27-30, anal spines III; lower gill rakers 19-27; pharyngeal teeth slender, but firm, not crowded, blade of lower bone 0.9-1.25 times length of dentigerous area; and depth of caudal peduncle greater than its length (Ref. 2). Freshly collected males vary in colour: sometimes with grey head, brownish-golden upper parts, or sometimes with pinkish unpaired fins and upper parts; under stress, or after death, males tend towards uniform black body and fins, with reddish-pink dorsal and tail fin margins; females and immatures vary from light grey to dark brownish background, with dark flank patches and an anal fin with faint vertical bars (Ref. 2, 118638).

A maternal mouthbrooder (Ref. 118638); oviparous (Ref. 205). A large, fast-growing species heavily exploited in its native range (Ref. 118638). It was globally cultured in the past, making use of its salt tolerance and ability to produce all-male strains through hybridisation with Oreochromis niloticus and O. mossambicus (Ref. 118638).

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver

Main reference Upload your references | referenser | Koordinator : Kullander, Sven O. | Medarbetare

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: 08 April 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fiskeri: kommersiell; Vattenbruk: kommersiell; Akvarium: Kommersiell

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=0.01585 (0.00773 - 0.03248), b=3.00 (2.83 - 3.17), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trofisk nivå (Ref. 69278): 2.0 ±0.00 se; based on food items.

Resiliens (Ref. 120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Fec=500).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (41 of 100).

Price category (Ref. 80766): Unknown.

Oreochromis urolepis (Norman, 1922)