Teleostei (teleosts) >
Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Gymnocharacinus: Greek, gymnos = naked + Greek, charax = the name of a fish (Ref. 45335).
More on author: Steindachner.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal. Subtropical; 22°C - 26°C (Ref. 35685); 35°S - 36°S
South America: Valcheta stream in Rio Negro basin, Southern Argentina.
Length at first maturity / Size / Weight / Age
Maturity: Lm 3.8  range ? - ? cm
Max length : 7.5 cm TL male/unsexed; (Ref. 38376)
Short description
Morphology | Morphometrics
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 12;
Anal
spines: 0;
Anal
soft rays: 19. Entirely naked (scale only shown on lateral line in specimens > 5 cm TL; head profile obtuse. Color is dark brown, greenish, the belly is cream; there is a copper-colored band on the flanks (Ref. 35685).
Medium sized fish considered to be the most southern characid living in temperate waters. Young with very tiny soft and delicate scales which are reabsorbed into the skin making the skin greasy and often with granulated or spongy appearance (Ref. 7252).
Ortubay, S. and V. Cussac, 2000. Threatened fishes of the world: Gymnocharacinus bergi Steindachner, 1903 (Characidae). Environ. Biol. Fishes 58:144. (Ref. 35685)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Fisheries: of no interest; aquarium: commercial
More information
Age/SizeGrowthLength-weightLength-lengthLength-frequenciesMorphometricsMorphologyLarvaeLarval dynamicsRecruitmentAbundanceBRUVS
ReferencesAquacultureAquaculture profileStrainsGeneticsElectrophoresesHeritabilityDiseasesProcessingNutrientsMass conversion
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00310 - 0.01692), b=3.18 (2.98 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Generation time: 1.7 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (tm=1).
Fishing Vulnerability (Ref.
59153): Low vulnerability (22 of 100).