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Tilapia guinasana Trewavas, 1936

Otjikoto tilapia
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Image of Tilapia guinasana (Otjikoto tilapia)
Tilapia guinasana
Male picture by Dubosc, J.

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Strahlenflosser) > Perciformes (Perch-likes) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Tilapia: Bechuana, African native thiape = fish (Ref. 45335).  More on author: Trewavas.

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

; süßwasser benthopelagisch; pH range: 7.0 - 7.8; dH range: ? - 15.   Tropical; 22°C - 26°C (Ref. 2059); 19°S - 21°S

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Africa: endemic to Lake Guinas, Namibia. Introduced to Lake Otjikoto and several reservoirs in Namibia. Also occurs in subterranean rivers.

Size / Gewicht / Alter

Maturity: Lm ?  range ? - ? cm
Max length : 14.0 cm TL Männchen/unbestimmt; (Ref. 6465)

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Found in deep sinkhole lakes (100 m deep or more, e.g. introduced population in Lake Otjikoto, Namibia) with moderately clear water and with water temperatures ranging from 19 to 27°C (Ref. 6465). Omnivorous (Ref. 52307), but feeds mainly on algae and diatoms (Ref. 6465, 52307). Generally congregate, breed and feed from the near-vertical shores. Use narrow shelves for breeding, with established and defended territories, both parents guard and tend eggs. Threatened due to depletion of local groundwater resources and impact of introduced species (Ref. 7248). Individuals tend to display different color patterns ranging from pure black to mottled black and blue, pink and white (Ref. 27829). Biparental open-spawning species (Ref. 52307).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

Nests are built on narrow rocky ledges and competition for these nest sites is very strong.

Hauptreferenz Upload your references | Referenzen | Koordinator : Kullander, Sven O. | Partner

Teugels, G.G. and D.F.E. Thys van den Audenaerde, 1991. Tilapia. p. 482-508. In J. Daget, J.-P. Gosse, G.G. Teugels and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 4. (Ref. 5163)

IUCN Rote Liste Status (Ref. 120744)

  vom Aussterben bedroht (CR) (B1ab(iii)+2ab(iii)); Date assessed: 01 March 2007

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: ; Aquarium: Kommerziell
FAO(Publication : search) | FishSource |

Mehr Information

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Metabolismus
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Ökotoxikologie
Fortpflanzung
Geschlechtsreife
Ablaichen
Spawning aggregation
Fecundity
Eier
Eientwicklung
Alter/Größe
Wachstum
Länge-Gewicht
Länge-Länge
Längenhäufigkeiten
Morphometrie
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Geschwindigkeit
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Kiemenoberfläche
Otoliths
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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00684 - 0.03200), b=2.98 (2.81 - 3.15), 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.
Widerstandsfähigkeit (Ref. 120179):  hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Verwundbarkeit (Ref. 59153):  Low vulnerability (15 of 100) .
Preiskategorie (Ref. 80766):   Unknown.