Classification / Names
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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Cichlinae
Etymology: Mazarunia: Taken from river Mazaruni; local habitat of this fish (Ref. 45335); charadrica: The specific name is derived from the Greek charadra, a mountain stream or a torrent. This is in reference to its apparent preference for reophilous habitats; the species is often found in the steep tributaries of the Mazaruni River that flow from the slopes of the Roraima massif and other mountainous sources in the area. To be regarded as an adjective in feminine form.
Eponymy: This is a toponym referring to the Mazaruni river system in Guyana. (Ref. 128868), visit book page.
Environment: milieu / climate zone / profondeur / distribution range
Écologie
; eau douce benthopélagique; pH range: 4.4 - 4.8. Tropical; 22°C - 25°C (Ref. 91746)
South America: Guyana from the upper Mazaruni River main channel, its direct tributaries, the Kamarang and Kukui Rivers and Abbou creek, and several tributaries of the Kako River, including Waruma, Sandaa and Paikwa creeks.
Taille / Poids / Âge
Maturité: Lm ? range ? - ? cm
Max length : 8.4 cm SL mâle / non sexé; (Ref. 91746)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Épines dorsales (Total) : 15 - 17; Rayons mous dorsaux (Total) : 8; Épines anales: 3; Rayons mous anaux: 7 - 8; Vertèbres: 26. Distinguished from all congeners, among other characters, by approximately equal uncinate process and anterior arm and reduced anteroventral expansion of epibranchial 1 (vs. uncinate process narrower and complete anteroventral expansion in the other two species), a dorso-ventrally flattened maxillary process of the palatine (vs. cylindrical in the other two species), cycloid (vs. ctenoid) scales in the opercular, postorbital, lateral chest and anal-genital regions, the absence of a mid-lateral spot, and a diffuse dark area covering the dorsal portion of the head giving the impression of a 'black cap'. Possessess a unique juvenile pattern of seven vertical dark bars partially preserved in adults. Bars 3-6 in antero-caudal direction are most visible in juveniles and medium-sized specimens but become fainter and almost disappear in adults. Many specimens show only bar number 3 (midlateral bar) (Ref. 91746).
Abundant in the entire upper Mazaruni River basin, and especially in tributaries with rocky substrates and rich in rapids. Collected from black water sites with fairly high transparency (0.55-1.0 m Secchi depth), none to relatively fast currents (0-0.6 m/s), temperature (21.7- 24.5°C), pH (4.4-4.8), dissolved oxygen (5.2- 9.3 mg/L) and very low conductivity (<10 µS). Ref. 91746).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
López-Fernández, H., D.C. Taphorn and E.A. Liverpool, 2012. Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species. Neotrop. Ichthyol. 10(3):465-486. (Ref. 91746)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-1)
Menace pour l'homme
Harmless
Utilisations par l'homme
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Estimates based on models
Phylogenetic diversity index (Réf.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.03020 (0.01346 - 0.06774), b=3.03 (2.84 - 3.22), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 3.2 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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