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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Cichlinae
Eponymy: Based on a local name for this fish in Mato Grosso, Brazil: ‘johanna guensa’. (Ref. 128868), visit book page.
More on author: Heckel.
Taxonomic Remarks
Redescription based on Peruvian material in Kullander (1986: 98) with bibliography, diagnosis, description, distribution, and illustrations. Ploeg (1991: 68) claimed that C. johanna is based on more than one specimen, and designated the only specimen found at NMW as lectotype (NMW 16431).
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water benthopelagisch; pH range: 7.0 - ? ; dH range: 20 - ?. Tropical; 23°C - 26°C (Ref. 2060)
South America: Amazon River basin, widespread in Peru, Brazil and Bolivia; in the Orinoco basin in Colombia and Venezuela; Essequibo drainage in Guyana; Oyapock and Approuague drainages in French Guiana; Amapá, Brazil.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 28.3 cm SL mannelijk / geslacht onbekend; (Ref. 36377)
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Varella, H.R., S.O. Kullander, N.A. Menezes, C. Oliveira and H. Lopez-Fernandez, 2023. Revision of the generic classification of pike cichlids using an integrative phylogenetic approach (Cichlidae: tribe Geophagini; subtribe Crenicichlina). Zool. J. Linn. Soc. 198(4):982-1034[1-43]. (Ref. 131257)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
Tools
Speciale rapporten
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Internetbronnen
Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00776 (0.00351 - 0.01718), b=3.12 (2.94 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.1 ±0.48 se; based on food items. |
Weerstandsvermogen (Ref. 120179) |
Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.). |
Kwetsbaarheid van de visserij (Ref. 59153) |
Moderate vulnerability (36 of 100). 🛈 |