Klassifizierung / Names
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Characiformes (Characins) >
Stevardiidae (Stevardiids) > Creagrutinae
Etymology: Creagrutus: Greek, kreagreytos, -os, -on = to tear, to rip up the flesh (Ref. 45335).
Eponymy: This species is named after the Tuyuka tribe of the Colombia-Brazil border region. (Ref. 128868), visit book page.
More on authors: Vari & Lima.
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
; süßwasser demersal. Tropical
South America: Rio Uaupés basin in Brazil.
Größe / Gewicht / Alter
Geschlechtsreife: Lm ? range ? - ? cm
Max length : 6.8 cm SL Männchen/unbestimmt; (Ref. 52414)
Kurzbeschreibung
Bestimmungsschlüssel | Morphologie | Morphometrie
Rückenflossenweichstrahlen (insgesamt) : 10; Afterflossenweichstrahlen: 14 - 15; Wirbelzahl: 39 - 41. It differs from Creagrutus amoenus and Creagrutus kunturus in its lack of the series of dark midlateral spots on the body that progressively coalesce ontogenetically to sometimes form a midlateral stripe in adults of the latter two species and in the distance from the snout to the anal fin origin (27.2-30.7 vs 33.8-38.8 and 30.8-34.0, respectively), distance from the snout to the pelvic fin insertion (22.2-25.6 vs 29.0-35.6 and 27.9-31.6, respectively), and the caudal peduncle depth (8.9-9.8 vs. 12.2-13.8 and 11.1-12.1, respectively). It further differs from Creagrutus amoenus in the number of vertebrae (39-41 with 39 in four specimens and 40 or 41 in 10 specimens vs 35-39 with 36-38 in 34 specimens and 39 in only one of 36 radiographed specimens, respectively, and from Creagrutus kunturus in the number of median predorsal scales (9 or 10 vs 12, respectively).
Occurs along the edge of a large pool immediately below a small fall preceded upstream by a long series of rapids and in a clear water stream with sandy bottom (Ref. 52414). Observed swimming close to the substrate in small schools of four to six fish (Ref. 52414). Feeds on benthic aquatic insect larvae (Ref. 52414).
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
Vari, R.P. and F.C.T. Lima, 2003. New species of Creagrutus (Teleostei: Characiformes: Characidae) from the Rio Uaupés basin, Brazil. Copeia 2003(3):583-587. (Ref. 52414)
IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Tools
Zusatzinformationen
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Internet Quellen
Schätzungen auf der Grundlage von Modellen
Phylogenetischer Diversitätsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00401 - 0.01809), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophische Ebene (Ref.
69278): 3.2 ±0.40 se; based on food items.
Anfälligkeit der Fischerei (Ref.
59153): Low vulnerability (10 of 100).
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