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Gymnogeophagus balzanii (Perugia, 1891)

Argentine humphead
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Gymnogeophagus balzanii
Male picture by Casacuberta, M.


Uruguay country information

Common names: Castañeta, Earth eater
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the lower Uruguay drainage (Ref. 36377).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/uy.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Kullander, S.O., 2003
National Database: Dinara

Common names from other countries

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

> Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Geophaginae
Etymology: Gymnogeophagus: Greek, gymnos = naked + Greek, gea = the earth + Greek, phaegein, to eat (Ref. 45335).

Issue
Redescription in Reis & Malabarba (1988).

Environment: milieu / climate zone / depth range / distribution range Ecología

; agua dulce bentopelágico; pH range: 6.0 - 8.0; dH range: 5 - 19.   Subtropical; 22°C - 26°C (Ref. 1672)

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | 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.

Tamaño / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 12.0 cm SL macho / no sexado; (Ref. 36377)

Biología     Glosario (por ej. epibenthic)

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

Life cycle and mating behavior Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva

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

Main reference Upload your references | Referencias | Coordinador : Kullander, Sven O. | Colaboradores

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. 130435)

  Least Concern (LC) ; Date assessed: 18 November 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Pesquerías: comercial; Acuario: Comercial
FAO(Publication : search) | FishSource |

Más información

Trophic ecology
componentes alimenticios
Diet compositions
Food consumptions
Food rations
Despredadores
Ecology
Ecología
Home ranges
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances
Life cycle
Reproducción
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larva
Dinámica larvaria
Distribution
Países
Áreas FAO
Ecosistemas
Ocurrencias, apariciones
Introducciones
BRUVS - Videos
Anatomy
Gill areas
Cerebros
Otolitos
Physiology
Body compositions
Nutrients
Oxygen consumptions
Tipo de natación
Swimming speeds
Visual pigment(s)
Sonidos de peces
Diseases / Parasites
Toxicities (LC50s)
Genetics
Genética
Electrophoreses
Heritabilities
Human related
Aquaculture systems
Perfiles de acuicultura
Razas
Ciguatera cases
Stamps, coins, misc.
Outreach
Colaboradores
References
Referencias

Herramientas

Special reports

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Fuentes de Internet

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5005   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02188 (0.01030 - 0.04649), b=3.03 (2.84 - 3.22), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nivel trófico (Ref. 69278):  3.3   ±0.5 se; based on size and trophs of closest relatives
Resiliencia (Ref. 120179):  Medio, población duplicada en un tiempo mínimo de 1.4-4.4 años (Fec=500).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).
Price category (Ref. 80766):   Unknown.