Actinoptérygiens (poissons à nageoires rayonnées) >
Perciformes (Perch-likes) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
Environnement / Climat / Gamme
Écologie
; eau douce benthopélagique. Tropical, preferred ?; 9°S - 15°S
Africa: Endemic to Lake Malawi.
Length at first maturity / Taille / Poids / Âge
Maturity: Lm 26.9, range 20 - 37 cm
Max length : 36.0 cm SL mâle / non sexé; (Ref. 4967)
Épines dorsales (Total): 16 - 17; Rayons mous dorsaux (Total): 10-11; Épines anales 3; Rayons mous anaux: 8 - 10; Vertèbres: 30 - 32. Lower pharyngeal toothed area with concave sides; median length of bone 1.26-1.36 times its width and 37.6-40.6 length of head; blade 1.6-2.4 times the median length of the toothed area. Caudal fin scaly.
Occurs at a temperature range of 21.5-29°C (Ref. 2), in all kinds of habitats but is seen mainly in shallow water. Is abundant in shallow vegetated bays. Forms schools. Feeds on phytoplankton, mainly diatoms, and sometimes from the sediment on the sand (Ref. 5595).
Mating behavior includes the T-stand, both partners alternately forming the horizontal part of the T. Eggs are laid in batches and immediately picked up by the female. Fertilization takes place both on the ground and in the mouth. Females brood eggs/young, guarding their fry until about 15 mm (Ref. 2781).
Trewavas, E. and G.G. Teugels, 1991. Oreochromis. p. 307-346. In J. Daget, J.-P. Gosse, G.G. Teugels and D.F.E. Thys van den Audenaerde (eds.) Checklist of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 4. (Ref. 5166)
Statut dans la liste rouge de l'IUCN (Ref. 115185)
CITES (Ref. 94142)
Not Evaluated
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: commercial; Aquarium: Commercial
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Estimates of some properties based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01698 (0.00863 - 0.03342), b=2.99 (2.83 - 3.15), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 2.1 ±0.00 se; Based on food items.
Résilience (Ref.
69278): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (K=0.24-0.45; tm=3).
Prior r = 0.57, 2 SD range = 0.27 - 1.22, log(r) = -0.56, SD log(r) = 0.38, Based on: 5 K, 1 tgen, 1 Fec records
Vulnérabilité (Ref.
59153): Moderate vulnerability (38 of 100) .
