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Gymnogeophagus balzanii  (Perugia, 1891)

Argentine humphead
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Native range | All suitable habitat
This map was computer-generated and has not yet been reviewed.
Gymnogeophagus balzanii   AquaMaps   Data sources: GBIF OBIS
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Image of Gymnogeophagus balzanii (Argentine humphead)
Gymnogeophagus balzanii
Male picture by Casacuberta, M.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Cichlidae (Cichlids) > Geophaginae
Etymology: Gymnogeophagus: Greek, gymnos = naked + Greek, gea = the earth + Greek, phaegein, to eat (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; benthopelagic; pH range: 6.0 - 8.0; dH range: 5 - 19.   Subtropical; 22°C - 26°C (Ref. 1672), preferred ?

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Paraná River basin, in the Paraguay drainage in Brazil and Paraguay, the Paraná drainage in Argentina; the lower Uruguay drainage in Uruguay and Brazil.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 12.0 cm SL male/unsexed; (Ref. 36377)

Biology     Glossary (e.g. epibenthic)

Max. length 20 cm TL (Ref. 1672).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Larvophile mouth brooders. Female tends the clutch. This updates previous information from Ref. 1672.

Main reference Upload your references | References | Coordinator : Kullander, Sven O. | Collaborators

Kullander, S.O., 2003. Cichlidae (Cichlids). p. 605-654. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36377)

IUCN Red List Status (Ref. 115185)

  Not Evaluated 

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Aquarium: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

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Age/Size
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Length-weight
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Summary page | Point data | Common names | Photos

Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5005   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02239 (0.00860 - 0.05828), b=3.03 (2.81 - 3.25), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (Fec=500).
Vulnerability (Ref. 59153):  Low vulnerability (16 of 100) .