Taxonomic Remarks
This species is synonym of Roeboides affinis (Günther, 1868) in Eschmeyer (CofF ver. May 2011: Ref. 86870) following Lucena (2007: Ref. 75795). The species page will be removed.
Meio ambiente: milieu / Zona climática / intervalo de profundidade / faixa de distribuição
Ecologia
; Água doce bentopelágico. Subtropical
South America: Paraguay, middle and lower Paraná, and Uruguay River basins.
Tamanho / Peso / Idade
Maturidade: Lm ?  range ? - ? cm
Max length : 18.5 cm SL macho/indeterminado; (Ref. 111728); peso máx. publicado: 76.00 g (Ref. 111728)
Inhabits inlets and backwater of rivers and slow-flowing streams. Forages mostly at twilight, stalking larger fishes to feed on their scales. Approaches its prey stealthily and usually aims at prey's flank. Its translucent body likely favor this stealthy approach. Strikes at prey mostly with its mouth closed, dislodging the scales with its stout, external and forward directed foremost premaxillary and dentary teeth. These teeth are often worn and sometimes missing, the differential teeth wear indicating right or left-handedness of a given individual (Ref. 28733). The jarring strike dislodges a few scales which are swallowed immediately if taken in the mouth, or are picked up as they sink. Besides scales, it feeds on aquatic insects. Juveniles up to 3 cm still do not bear the stout external teeth, hence feed mostly on insects and tiny crustaceans (e.g. ostracods) (Ref. 40383).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Lucena, C.A.S. and N.A. Menezes, 2003. Subfamily Characinae (Characins, tetras). p. 200-208. 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. 36811)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2025-2 (Global))
Ameaça para os humanos
Harmless
Uso pelos humanos
Ferramentas
Relatórios especiais
Baixar XML
Fontes da internet
Estimativas baseadas em modelos
Índice de diversidade filogenética (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01202 (0.00581 - 0.02486), b=3.19 (3.01 - 3.37), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245). |
Nível Trófico (Ref. 69278) |
4.1 ±0.70 se; based on food items. |
Vulnerabilidade da pesca (Ref. 59153) |
Low vulnerability (13 of 100). 🛈 |