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> Characiformes (Characins) > Characidae (Characins; tetras) > Stethaprioninae
Etymology: Hemigrammus: Greek, hemi = half + Greek, gramma = letter, signal (Ref. 45335); arua: Named for its type locality, lago São Francisco do Alto Aruã, A noun in apposition.

Environment: milieu / climate zone / depth range / distribution range Ökologie

; süßwasser benthopelagisch; tiefenbereich 1 - 2 m (Ref. 81198). Tropical

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South America: headwaters of the rio Arapiuns, rio Tapajós basin, and from the adjacent headwaters of the igarapé Juruti Grande, rio Amazonas in Brazil.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 3.0 cm SL Männchen/unbestimmt; (Ref. 81198)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenweichstrahlen (insgesamt) : 11 - 12; Afterflossenweichstrahlen: 21 - 25; Wirbelzahl: 31. Distinguished from all species of the genus, except Hemigrammus stictus (Durbin), by having a large single humeral spot situated from fifth-sixth to posterior margin of eighth-tenth lateral line scales. Differs from Hemigrammus stictus by having a humeral spot roughly rectangular, higher than wide, with a pronounced upper, anteriorly-oriented extension, conferring an inverted-comma shape to the blotch (vs. humeral spot roughly rounded, not presenting an inverted-comma shape), and life color pattern presenting unpaired fins orange reddish (vs. caudal fin and caudal peduncle bright red in life, remaining fins translucent) (Ref. 81198).

Inhabits shallow marginal areas, with abundant aquatic macrophytes, both emergent and non-emergent (Ref. 81198). Gut contents of four specimens include insect larvae, winged insects and plant matter (Ref. 81198).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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Lima, F.C.T., W.B. Wosiacki and C.S. Ramos, 2009. Hemigrammus arua, a new species of characid (Characiformes: Characidae) from the lower Amazon, Brazil. Neotrop. Ichthyol. 7(2):153-160. (Ref. 81198)

IUCN Rote Liste Status (Ref. 130435: Version 2024-2)

nicht bedroht (LC) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01445 (0.00683 - 0.03057), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.0 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Hemigrammus arua Lima, Wosiacki & Ramos, 2009