Melanochromis robustus

Melanochromis robustus Johnson, 1985

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drawing shows typical species in Cichlidae.

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> Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Melanochromis: Greek, melas, melanos = black + Greek, chromis = a fish, perhaps a perch (Ref. 45335).

Environnement : milieu / zone climatique / profondeur / gamme de distribution Écologie

; eau douce benthopélagique; profondeur ? - 5 m (Ref. 89864). Tropical; 11°S - 13°S

Distribution Territoires | Zones FAO | Écosystèmes | Occurrences | Carte par point | Introductions | Faunafri

Africa: endemic to Lake Malawi (Ref. 89864).

Taille / Poids / Âge

Maturité: Lm ?  range ? - ? cm
Max length : 12.4 cm SL mâle / non sexé; (Ref. 89864)

Description synthétique Clés d'identification | Morphologie | Morphométrie

Épines dorsales (Total) : 16 - 18; Rayons mous dorsaux (Total) : 8 - 10; Épines anales: 3; Rayons mous anaux: 6 - 8. Diagnosis: Melanochromis robustus has a basic melanin pattern consisting of two longitudinal black stripes on the body, of which the mid-lateral stripe reverses colour with the background in the breeding male, a character that makes it a member of Melanochromis (Ref. 89864). Female M. robustus are distinguished from all other congeners, except those of M. melanopterus, M. vermivorus, and M. mpoto, by a gray to brown coloured body, which is white to yellow in other congeners; mouthbrooding females may have additional vertical bars on the flanks, but these are more diffuse than the horizontal stripes (Ref. 89864). Both male and female M. robustus are distinguished from M. melanopterus, M. vermivorus, and M. mpoto by a broader interorbital breadth, the width of which is 26.1-29.6% of head length, vs. 16.6-20.6% in M. melanopterus, 18.5-25.5% in M. vermivorus, and 14.8-21.8% in M. mpoto (Ref. 89864). Male M. robustus in breeding colouration are distinguished from all other congeners by a dark-blue body colour and two light blue horizontal stripes on the flank superimposed with dark-blue to black vertical bars; the bars are interrupted by the light-coloured horizontal lines; none of the other known species of Melanochromis has a male colouration where the horizontal and vertical elements of the pattern are expressed simultaneously; superficially, breeding males of the sympatric and smaller M. heterochromis have a similar colouration, albeit lacking the vertical bars; Melanochromis heterochromis can also be distinguished by its light-coloured mid-lateral stripe, which rarely spans more than two scales but is usually three to four scales deep in M. robustus; Melanochromis robustus is further distinguished from M. heterochromis by a longer snout, 33.8-38.0% of head length vs. 26.8-31.5% in M. heterochromis, and by a deeper caudal peduncle, 12.9-14.4% of standard length vs. 9.8-11.7% in M. heterochromis (Ref. 89864).
Body shape (shape guide): fusiform / normal.

Biologie     Glossaire (ex. epibenthic)

Found in the very shallow, less than 5 m deep, rocky habitat at the islands of Chinyankwazi and Mumbo in Lake Malawi (Ref. 89864). It has an opportunistic feeding behaviour in which the species is attracted to visible particles floating in the water column rather than collecting food by systematically browsing from the rocky substrate (Ref. 89864). Males in breeding colouration energetically defend spawning sites, which are located inside caves and crevices between the rocks, against conspecific males; male territories have an estimated diameter of 2-3 meters (Ref. 89864). Mouthbrooding females remain solitary and stay close to the rocky substrate (Ref. 89864).

Cycle de vie et comportement reproducteur Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Téléchargez vos références | Références | Coordinateur : Kullander, Sven O. | Collaborateurs

Konings, A.F. and J.R. Stauffer Jr., 2012. Review of the Lake Malawi genus Melanochromis (Teleostei: Cichlidae) with a description of a new species. Zootaxa 3258:1-27. (Ref. 89864)

Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))

  Quasi-menacé (NT) (B1a+2a); Date assessed: 09 June 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

Pêcheries: sans intérêt
FAO - Publication: search | FishSource |

Plus d'informations

Écologie trophique
Aliments (proies)
Composition du régime alimentaire
Consommation alimentaire
Rations alimentaires
Prédateurs
Écologie
Écologie
Dynamique des populations
Paramètres de croissance
Âges / tailles maximales
Longueur-poids rel.
Rel. longueur-longueur.
Fréquences de longueurs
Conversion de masse
Recrutement
Abondance
Cycle de vie
Reproduction
Maturité
Maturité/épines rel.
Fécondité
Frai
Agrégats de frai
Œufs
Développement de l'œuf
Larves
Dynamique des populations larvaires
Distribution
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Écosystèmes
Occurrences
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BRUVS - Vidéos
Anatomie
Surface branchiale
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Otolithe
Physiologie
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Type de natation
Vitesse de nage
Pigments visuels
Son de poisson
Maladies et parasites
Toxicité (CL50)
Génétique
génôme
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Systèmes d'aquaculture
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Timbres, pièces de monnaie, divers
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Synonymes
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Morphométrie
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Références

Outils

E-book | Guide de terrain | Générateur de fréquences de longueur | Outil de dynamique de population | Carte par point | Capture-MSY |

Articles particuliers

Maintenance en aquarium | Articles sur l'espèce | Rapports d'aquaculture

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Page de résumé | Coordonnées géographiques | Noms communs | Photos

Sources Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimations basées sur des modèles

Indice de diversité phylogénétique
(Réf. 82804) 		PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Niveau trophique
(Réf. 69278) 		3.4   ±0.5 se; based on size and trophs of closest relatives
Résilience
(Réf. 120179) 		Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Vulnérabilité de la pêche
(Ref. 59153) 		Low vulnerability (18 of 100). 🛈