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Characiformes (Characins) >
Characidae (Characins; tetras) > Aphyocharacinae
Etymology: Cyanogaster: Cyano, latinized from the Greek word kúanous (κυανος), meaning blue, and gaster, from the Greek gastêr (γαστηρ), meaning stomach, in referring to the conspicuous iridescent blue colour in the abdominal region ; noctivaga: Name from Latin noun 'nox' for night and the verb 'vagare' meaning to walk about, when combined as 'noctivaga' or the night wanderer, referring to the presumed nocturnal habits of the species, which was collected exclusively at night; an adjective.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten bentopelagisk; djupintervall ? - 2 m (Ref. 93233). Tropical
South America: Brazil and Colombia.
Storlek / Vikt / Ålder
Könsmognad: Lm ? range ? - ? cm
Max length : 1.7 cm SL hane/ej könsbestämd; (Ref. 93233)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 8 - 9; Mjukstrålar i analfenan: 19 - 22. This species is distinguished by the following characters: D ii + 8; pelvic-fin rays i + 5; teeth in the inner series of the premaxilla 4; differs from all species of the Stevardiinae by having a single conical tooth in the outer premaxillary series (vs. absent); lacks a pheromone pump usually associated with modified scales on the caudal-fin base; eye large; a line of black chromatophores along the bases of anal and caudal fins; body transparent with abdominal region iridescent blue in life (Ref. 93233).
Cross section: compressed.
Specimens were caught with a seine pulled at approximately 1.5 m depth. The type locality is a beach on a rocky poorly vegetated plateau, where the water was dark black with slow current. Individuals were collected at night, approximately between 20:00 and 24:00, during the dry season (October). Stomach contents of cleared and stained specimens were mainly remnants of insect larvae (Ref. 93233).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Mattox, G.M.T., R. Britz, M. Toledo-Piza and M.M.F. Marinho, 2013. Cyanogaster noctivaga, a remarkable new genus and species of miniature fish from the Rio Negro, Amazon basin (Ostariophysi: Characidae). Ichthyol. Explor. Freshwat. 23(4):297-318. (Ref. 93233)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: saknar intresse
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
Sårbarhet i fisket (Ref.
59153): Low vulnerability (10 of 100).
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