Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335).
Eponymy: Astyanax was the son of Hector in Greek mythology. See Homer’s Iliad for details. The reasoning for its use for a genus of characins is not explained. Raúl Horacio Arámburu (1924–2004) was a researcher and professor of the Museo de La Plata, Buenos Aires. He was the first Professor of Ichthyology in Argentina. This species of fish is endemic to Argentina. (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; pelagic; depth range 2 - ? m (Ref. 57546). Subtropical
South America: Argentina.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 6.1 cm SL male/unsexed; (Ref. 57546)
Diagnosis: Distinct from its congeners in having a round or trapezoidal black humeral spot, dorsal to the lateral line; a branch of the infraorbital sensory canal directed ventrally, continued as a series of pores totally or partially traversing the third infraorbital; body relatively slender (31.8-37.4% SL); eye large (41.1-45.8% HL); snout short (15.5-20.9% HL); caudal peduncle relatively slender (10.3-12% SL); one pentacuspid maxillary tooth; pored lateral line scales 38-42; and anal fin rays v-vi, 23-29. The males have breeding tubercles on the head and scales, and bony hooks on all fins (Ref. 57546).
Collected from a creek which is a relatively extensive watercourse, with sections about 50 m wide and pools over 2 m deep; vegetated with grasses and other plants, and the bottom consists of mud and clay (Ref. 57546).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Protogino, L., A.M. Miquelarena and H.L. López, 2006. A new species of Astyanax (Teleostei, Characiformes, Characidae), with breeding tubercles, from Paraná and Uruguay river basins. Zootaxa 1297:1-16. (Ref. 57546)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Fisheries: of no interest
Tools
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00493 - 0.02437), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
