Actinoptérygiens (poissons à nageoires rayonnées)
(Perch-likes) > Cichlidae
(Cichlids) > Pseudocrenilabrinae
Etymology: Alcolapia: From Albert Alcock, 1891, edited the research campaigne carried out by the ship Investigator in Bengal and Calcute + Bechauana, Tihape = fish.
Environment: milieu / climate zone / depth range / distribution range
; eau douce benthopélagique; pH range: 7.5 - 8.5; dH range: 10 - 20. Tropical; 24°C - 32°C (Ref. 2060); 1°S - 2°S
Africa: Lake Magadi in Kenya (Ref. 52331). Introduced in Lake Nakuru and Lake Elmenteita, both in Kenya (Ref. 52331). Reported as introduced to Lake Natron in Tanzania (Ref. 13364), but there is currently no evidence that any introduction led to establishment of breeding populations (Ref. 118638).
Length at first maturity / Taille / Poids / Âge
Maturity: Lm ?, range 3 - ? cm
Max length : 20.0 cm SL mâle / non sexé; (Ref. 2)
Épines dorsales (Total): 11 - 13; Rayons mous dorsaux (Total): 12-13; Épines anales 3; Rayons mous anaux: 9 - 11; Vertèbres: 28. Mature females with an overall golden hue; males with the flanks a pale blue. Swollen and brilliant white lateral parts of the lower lip of the mature male. Blue spots on scales becoming iridescent. Genital papilla conical, prominent and yellow in the mature male; swollen in the mature female. An oblique eye-bar intensely black in the breeding male, duller in the female.
Occur at temperatures ranging from 16.0-40.0 °C (Ref. 2). Feed actively in the evening. Young O. alcalicus grahami eat eggs as they are shed by the female, and much of the time and energy of the territorial male is occupied in driving them off. Feed on invertebrates, at the surface (Ref. 2).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Male prepares a breeding pit, the structure of which may vary with the nature of the substratum. Breeding activities are more actively pursued by both sexes in the morning than in the afternoon. Female lays about 3-10 eggs at a time, picks them up instantly and the male swims with his genital papilla near the mouth, probably emitting sperm. Brooding period reportedly 12-16 days.
Seegers, L. and H. Tichy, 1999. The Oreochromis alcalicus flock (Teleostei: Cichlidae) from lakes Natron and Magadi, Tanzania and Kenya, with descriptions of two new species. Ichthyol. Explor. Freshwaters 10(2):97-146. (Ref. 32272)
Statut dans la liste rouge de l'IUCN (Ref. 119314)
CITES (Ref. 115941)
Menace pour l'homme
Utilisations par l'homme
Pêcheries: ; Aquarium: Commercial
CollaborateursImagesStamps, Coins Misc.SonsCiguateraVitesseType de nageSurface branchialeOtolithesCerveauxVision
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Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Niveau trophique (Ref. 69278
): 2.8 ±0.28 se; Based on food items.
Résilience (Ref. 69278
): Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Vulnérabilité (Ref. 59153
): Low to moderate vulnerability (27 of 100) .