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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Abactochromis: Name from Latin 'abactus' meaning driven away, banished, expelled; and 'chromis' which is widely used as a root in generic names of cichlids. The name alludes to the solitary, wandering, apparently non-territorial habits of living individuals, and the removal of this species from Melanochromis which it has mistakenly remained for 75 years.
More on author: Trewavas.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water demersaal; pH range: 7.0 - 8.5; dH range: 10 - 15; diepte 0 - 30 m (Ref. 85491). Tropical; 23°C - 26°C (Ref. 1672); 11°S - 14°S
Africa: Lake Malawi (Ref. 85491).
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 11.5 cm SL mannelijk / geslacht onbekend; (Ref. 85491)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 15 - 17; Anale stekels: 3; Wervels: 28 - 29. This species is distinguished from all other mbuna genera by the following characters: strongly hypertrophied , papillose, medially lobate lips; large head at least 40% SL in > 5 cm SL individuals; premaxillary pedicel (ascending process) >35% HL. Other non-mbuna haplochromine species endemic to Lake Malawi resemble this species in having enlarged and often lobate lips, but all can be distinguished as follows: Placidochromis milomo with total vertebrae 30-31 (vs. 28-29 in Abactochromis), segmented anal-fin rays 9-10 (vs. 7-8), broad, black vertical bars below the dorsal-fin base 4 (vs. 6-7 narrow subdorsal bars when distinct), reaches at least 19 cm SL (vs. ca. 12 cm); Otopharynx pachycheilus with longer pectoral fin 38-44% SL (vs. 19-27), shorter premaxillary pedicel 24-35% HL (vs. 36-46), color pattern of three lateral spots (vs. vertical bars with no lateral spots), depth range of 78-135 m (vs. 0-30 m); Cheilochromis euchilus total vertebrae 30-31, head and jaws not laterally compressed (vs. distinctly compressed), 2-3- horizontal stripes (vs. narrow bars with no horizontal stripes); Chilotilapia rhoadesii total vertebrae 31, thickened lips with no median lobes (vs. strongly lobate medially), adult teeth for crushing gastropod molluscs - robust with crowns shaped like grains of wheat, blunt, recurved and grooved on the outer surface (vs. oral dentition not similarly specialized), head and jaws not laterally compressed (vs. compressed), 2-3 horizontal stripes (vs. narrow bars with no horizontal stripes); Eclectochromis spp. with total vertebrae 30, segmented dorsal-fin rays 10-11 (vs. 7-9), thickened lips with no median lobes, some submolariform posteromedian pharyngeal teeth (vs. posteromedian teeth slightly enlarged by their crowns laterally compressed), color pattern of vertical bars alternating with dark spots along dorsum (vs. bars only); Lichnochromis acuticeps total vertebrae 32, thickened lips with no median lobes, with oblique stripe from nape to base of caudal fin (vs. no oblique stripe) (Ref. 85491).
Found over rocky substrate (Ref. 6307).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Oliver, M.K. and M.E. Arnegard, 2010. A new genus for Melanochromis labrosus, a problematic Lake Malawi cichlid with hypertrophied lips (Teleostei: Cichlidae). Ichthyol. Explor. Freshwat. 21(3):209-232. (Ref. 85491)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-1)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: commercieel; Aquarium: Commercieel
Tools
Speciale rapporten
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01862 (0.00830 - 0.04177), b=3.01 (2.82 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
