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Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Characidae (Characins) > Gymnocharacinae
Etymology: Gymnocharacinus: Greek, gymnos = naked + Greek, charax = the name of a fish (Ref. 45335). More on author: Steindachner.

Environment / Climate / Range Ecology

Freshwater; demersal. Subtropical; 22°C - 26°C (Ref. 35685), preferred ?; 35°S - 36°S

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

South America: Valcheta stream in Rio Negro basin, Southern Argentina.

Length at first maturity / Size / Weight / Age

Maturity: L_m 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).

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

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Ortubay, S. and V. Cussac, 2000. Threatened fishes of the world: Gymnocharacinus bergi Steindachner, 1903 (Characidae). Environ. Biol. Fish. 58:144. (Ref. 35685)

IUCN Red List Status (Ref. 109396)

Endangered (EN) (A2ce, B1+2c)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest; aquarium: commercial

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), based on all LWR estimates for this body shape (Ref. 93245).

Trophic Level (Ref. 69278): 3.4 ±0.5 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278): High, minimum population doubling time less than 15 months (tm=1).

Vulnerability (Ref. 59153): Low vulnerability (15 of 100) .

Entered by Cruz, Tess

Modified by Casal, Christine Marie V.

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Gymnocharacinus bergii Steindachner, 1903