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Characiformes (Characins) >
Characidae (Characins) > Stethaprioninae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mithology (Ref. 45335); dissensus: Name from Latin dissensus, meaning disagreement, in reference to the larger maxillary heptacuspid tooth peculiar to the species and unusual in Astyanax species.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoetwater benthopelagisch. Subtropical
South America: Laguna dos Patos system and rio Uruguay drainage; one specimen from coastal lagoon of rio Tramandaí system.
Size / Gewicht / Leeftijd
Maturity: Lm ?  range ? - ? cm
Max length : 8.4 cm SL mannelijk/geslacht niet bekend; (Ref. 94153)
Korte beschrijving
Morfologie | Morfometrie
Dorsale zachte stralen (totaal): 10-11; Anale zachte stralen: 27 - 33; Wervels: 35 - 36. This species can be diagnosed from all congeners in the rio Uruguay basin, laguna dos Patos and rio Tramandaí systems, except Astyanax ojiara, by the presence of one heptacuspid tooth on maxillary (vs. tri- to pentacuspid teeth). It differs from other congeners, including species complex A. bimaculatus and A. scabripinnis by the following combination of characters: two humeral spots, the first spot vertically elongate; conspicuous caudal spot; 35-39 perforated lateral line scales; 6-7 scale rows between dorsal-fin origin and lateral line; 22-28 branched anal-fin rays; predorsal region scaled; one heptacuspid maxillary tooth; body depth 37.2-44.2% of SL; and head length 22.7-27.3% of SL). It is distinguished from A. ojiara by the head length 22.7- 27.3% (vs. 27.3-29.5% of SL) and by the presence of hooks on anal fin on males (vs. all fins with hooks) (Ref. 94153).
Life cycle and mating behavior
Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven
De Lucena, C.A.S., J.B. Castro and V.A. Bertaco, 2013. Three new species of Astyanax from drainages of southern Brazil (Characiformes: Characidae). Neotrop. Ichthyol. 11(3):537-552. (Ref. 94153)
Status op de Rode Lijst van het IUCN (Ref. 123251)
CITES (Ref. 123416)
Not Evaluated
Gevaarlijk voor mensen
Harmless
Gebruik door de mens
Meer informatie
Populaire namenSynoniemenMetabolismePredatorsEcotoxicologieVoortplantingGeslachtsrijpheidKuitschietenSpawning aggregationFecundityEierenOntwikkeling van de eieren
Leeftijd/GrootteGroeiLengte-gewicht parametersLengte-lengte parametersLengtefrequentiesMorfometrieMorfologieLarvenPopulatiedynamica van de larvenrecruteringAbundantieBRUVS
ReferentiesAquacultuurAquacultuurprofielKweeklijnenGeneticaAlleelfrequentiesErfelijkheidZiektenVerwerkingMass conversion
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Estimates based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01288 (0.00595 - 0.02787), b=3.06 (2.89 - 3.23), 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
Weerstandsvermogen (Ref.
120179): .
Kwetsbaarheid (Ref.
59153): Low vulnerability (10 of 100) .