You can sponsor this page

Alcolapia alcalica (Hilgendorf, 1905)

Common Natron tilapia
Envoyez vos Photos et vidéos
Pictures | Images Google
Image of Alcolapia alcalica (Common Natron tilapia)
Alcolapia alcalica
Male picture by Seegers, L.

Classification / Names Noms communs | Synonymes | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinoptérygiens (poissons à nageoires rayonnées) > Perciformes (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.  More on author: Hilgendorf.

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

; eau douce benthopélagique.   Tropical; 2°S - 3°S

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Africa: known only from the catchment of Lake Natron, Tanzania and Kenya (Ref. 2, 5166, 118638).

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 11.6 cm TL mâle / non sexé; (Ref. 32272)

Description synthétique Morphologie | Morphométrie

Épines dorsales (Total): 9 - 13; Rayons mous dorsaux (Total): 11-15; Épines anales 3; Rayons mous anaux: 9 - 11; Vertèbres: 27 - 30. Diagnosis: A small elongated species with a terminal mouth (Ref. 118638). Mature males have dark-edged dorsal and anal fins, iridescent blue-white spots on flanks, white lower lips, and a spotted caudal fin with a pink edge; they appear to be colour polymorphic, with some males having yellow bellies and throats, while others are blue white: both morphs can be found in the same location and the colours are stable in aquarium-held specimens, suggesting it is a true polymorphism and not related to reproductive state (Ref. 118638). Females and non-territorial males are sandy-coloured, pale ventrally, sometimes with faint vertical bars (Ref. 118638).

Biologie     Glossaire (ex. epibenthic)

Occurs at a temperature range of 30-32°C (Ref. 2). It feeds actively in the early morning; mainly on algae as well as copepods and dipterous larvae (Ref. 2). A maternal mouthbrooder: males excavate pits in the substrate in shallow water (Ref. 2, 118638). The species is occasionally caught as a food fish in its natural range; although it attains a small size, its tolerance of hostile environments may make it suitable for culture in high salinity environments; potential as an aquarium fish (Ref. 118638). Classed as endangered, due to its restricted distribution (Ref. 118638).

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Early in the morning before taking possession of their pits, the males feed on slimy algal growths-noisily; sexual activity is greater after noon than before; young male may build a small pit around that of a larger male and mate there with a small female (Ref. 2). Males prepare and guard nests, while females migrate from one nest to another; males guard the nest against juveniles of their own species and other species which feed on the fertilized eggs which fall from the mouth of the female mouth brooder (Ref. 11288). Also Ref. 118638.

Référence principale Upload your references | Références | Coordinateur : Kullander, Sven O. | Collaborateurs

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)

  Menacé (EN) (B1ab(i,ii,iii)+2ab(i,ii,iii)); Date assessed: 31 January 2006

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

Pêcheries:
FAO(Publication : search) | FishSource |

Plus d'informations

Pays
Zones FAO
Écosystèmes
Occurrences
Introductions
Stocks
Écologie
Régime alimentaire
Éléments du régime alimentaire
Consommation alimentaire
Ration
Noms communs
Synonymes
Métabolisme
Prédateurs
Écotoxicologie
Reproduction
Maturité
Frai
Rassemblement de ponte
Fécondité
Œufs
Développement de l'œuf
Taille/Âge
Croissance
Longueur-poids
Longueur-longueur
Fréquences de longueurs
Morphométrie
Morphologie
Larves
Dynamique des populations larvaires
Recrutement
Abondance
Références
Aquaculture
Profil d'aquaculture
Souches
Génétique
Fréquences alléliques
Héritabilité
Pathologies
Traitement
Mass conversion
Collaborateurs
Images
Stamps, Coins Misc.
Sons
Ciguatera
Vitesse
Type de nage
Surface branchiale
Otolithes
Cerveaux
Vision

Outils

Articles particuliers

Télécharger en XML

Sources Internet

Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(génôme, nucléotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | SeaLifeBase | Arbre de Vie | Wikipedia(aller à, chercher) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01622 (0.00704 - 0.03738), b=3.02 (2.82 - 3.22), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Niveau trophique (Ref. 69278):  2.7   ±0.21 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 vulnerability (13 of 100) .
Catégorie de prix (Ref. 80766):   Unknown.