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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ecología
; agua dulce; salobre bentopelágico. Tropical
Africa: Lower part of Pangani River and neighbouring Zigi River in Tazania and Kenya (Ref. 2, 52331, 118630). Introduced in Mlingano dam, south of Pangani River, and probably other dams in coastal zone of Tanzania (Ref. 2, 54836). Also in Lake Rutamba, Lake Nambawala and Lake Mitupa near Lindi in southeast Tanzania (Ref. 118630, 118638).
Tamaño / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 16.1 cm SL macho / no sexado; (Ref. 52331)
Short description
Claves de identificación | Morfología | Morfometría
Espinas dorsales (total) : 16 - 18; Radios blandos dorsales (total) : 9 - 11; Espinas anales: 3 - 4; Radios blandos anales: 9 - 11; Vértebra: 29 - 30. Diagnosis: A small bodied tilapia (Ref. 118638). About 50% of individuals have IV anal spines, the modal numbers of vertebrae (29), dorsal rays (27) and gill-rakers (15) are low, and the jaws of breeding males are enlarged (Ref. 2). Females, subadult males and juveniles with a silver/grey flank colour, light ventral colour, and characteristic melanin pattern of 7-9 broken vertical stripes on the dorsal side giving a spotted appearance; males darker, with a series of white spots/bars on the flanks; ripe males have red margins on dorsal and caudal, with a reddish tinge to the pectoral fins; males from southern populations showed a bluish sheen and less contrasting male colouration (Ref. 118638). In breeding males the throat and chest are black and broad dark vertical bars are conspicuous on the lower half of the body (Ref. 2, 4967, 54096).
A maternal mouthbrooder (Ref. 118638). There is evidence of hybridization with native Oreochromis jipe in northern Tanzania, and non-native O. niloticus in southern Tanzania (Ref. 118638). Of only minor importance to artisanal fisheries (Ref. 118638). Maximum standard length of 18 cm (Ref. 4967) is not confirmed (Ref. 2, G.F. Turner pers. comm.); maximum total length reported as 20.8 cm (Ref. 2, 118638).
Life cycle and mating behavior
Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva
A maternal mouthbrooder (Ref. 118638).
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)
Threat to humans
Harmless
Human uses
Acuicultura: posible uso futuro
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 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).
Nivel trófico (Ref.
69278): 3.2 ±0.40 se; based on food items.
Resiliencia (Ref.
120179): Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
