Haplochromis glaucus

Haplochromis glaucus Vranken, Van Steenberge, Heylen, Decru & Snoeks, 2022

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Image of Haplochromis glaucus
No image available for this species;
drawing shows typical species in Cichlidae.

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Haplochromis: Greek, Haploos = single + Greek, chromis = a fish, perhaps a perch (Ref. 45335); glaucus: Specific name from the Latin 'glaucus' for 'greyish blue'; referring to grey and light-blue colour pattern of all adult specimens (Ref. 126312).

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser pelagisch. Tropical

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Africa: Lake Edward (Ref. 126312).

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 15.8 cm SL Männchen/unbestimmt; (Ref. 126312)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 14 - 16; Rückenflossenweichstrahlen (insgesamt) : 9 - 10; Afterflossenstacheln: 3; Afterflossenweichstrahlen: 8 - 10; Wirbelzahl: 29 - 30. Diagnosis: Species with a piscivorous morphology; snout acute in lateral view; outer oral teeth few and large, 25-47; males grey with light blue flank and a dusky to black head; female colour pattern similar to males (Ref. 126312). Amongst piscivorous species from the Lake Edward system, H. glaucus differs from H. latifrons and H. mentatus by a shorter caudal peduncle, caudal peduncle length 13.4-16.1% of standard length vs. 15.7-18.0%; further from H. latifrons by a longer anal fin base, 17.3-20.3% of standard length vs. 14.7-17.3%; and absence vs. presence of a well-defined mid-lateral band; further from H. mentatus by a broader lower pharyngeal bone, lower pharyngeal width 93.3-95.1% of lower pharyngeal length vs. 83.6-85.7%; a slightly longer pre-pectoral distance, 36.4-39.4% of standard length vs. 33.1-38.2%; and dominant males uniformly light blue vs. yellow-green with a red anterior part of flank (Ref. 126312). It differs from H. rex and H. simba by a broader interorbital rea, interorbital width 50.957.1% of head width vs. 44.9-52.7%; further from H. rex by a gentler sloping snout, 30-40° vs. 40-50°; acute vs. rounded oral jaws in dorsal view; and dominant males light blue with a blackish operculum and a dusky snout vs. cream-coloured with an orange operculum and a light blue snout; further from H. simba by a broader lower pharyngeal bone, lower pharyngeal width 93.3-95.1% of lower pharyngeal length vs. 83.8-87.9%; absent or weakly developed vs. strongly developed mental prominence; and dominant males uniformly light-blue vs. yellow with an orange anterior part of flank (Ref. 126312). It differs from H. aquila by the combination of a smaller eye, eye diameter 23.2-28.7% of head length vs. 30.0-31.5%; a narrower head, head width 38.9-40.9% of head length vs. 40.1-43.7%; and dominant males light blue with crimson anal and caudal fins vs. light grey with bright red anal and caudal fins (Ref. 126312). It differs from H. kimondo, H. curvidens, and H. quasimodo by the combination of a narrower head, head width 38.9-40.9% of head length vs. 42.0-48.1%; large vs. small outer oral teeth; and a smaller number of outer upper jaw teeth, 25-47 vs. 43-71; further from H. kimondo and H. quasimodo by dominant males light blue vs. grey dorsally and yellow or blue-black ventrally (Ref. 126312). It differs from H. falcatus by the combination of a shorter predorsal distance, 35.4-37.0% of standard length vs. 36.9-41.1%; a steeper lower jaw side, 35-45° vs. 15-25°; weakly recurved vs. strongly recurved outer oral teeth; and dominant males uniformly light blue vs. olive-green with an orange-red anterior part of flank (Ref. 126312). It differs from H. pardus by the combination of deeper lacrimal, lacrimal depth 18.0-22.7% of head length vs. 16.0-18.3%; a broader interorbital area, interorbital width 50.9-57.1% of head width vs. 39.3-48.4%; and dominant males light blue vs. speckled to uniformly black (Ref. 126312). It further differs from H. squamipinnis by the combination of a gentler gape inclination, 20-30° vs. 30-45°; absence vs. presence of minute scales on proximal parts of dorsal and anal fins; and dominant males light blue vs. slate blue (Ref. 126312).

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Found over sandy substrates (Ref. 126312). Based on its morphology, most probably a piscivorous species (Ref. 126312).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

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Vranken, N., M. Van Steenberge, A. Heylen, E. Decru and J. Snoeks, 2022. From a pair to a dozen: the piscivorous species of Haplochromis (Cichlidae) from the Lake Edward system. Eur. J. Taxon. 815:1-94. (Ref. 126312)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01445 (0.00671 - 0.03113), b=2.99 (2.82 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophische Ebene (Ref. 69278):  3.4   ±0.5 se; based on size and trophs of closest relatives
Widerstandsfähigkeit (Ref. 120179):  hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Anfälligkeit der Fischerei (Ref. 59153):  Low vulnerability (10 of 100). 🛈