Klassificering / Namn
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Cypriniformes (Carps) >
Xenocyprididae (East Asian minnows)
Etymology: Opsariichthys: Greek, opsarion, -ou = a little portion fish + Greek, ichthys = fish (Ref. 45335); duchuunguyeni: Named for Prof. Nguyen Huu Duc, who has contributed to Vietnamese freshwater fishes research.
Eponymy: Dr Nguyễn Huu Duc is a Vietnamese ichthyologist who is Associate Professor at the Hanoi National University of Education. [...] (Ref. 128868), visit book page.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten bentopelagisk. Tropical
Asia: Bang Giang river and Ky Cung river of the Pearl river in Viet Nam.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 7.3 cm SL hane/ej könsbestämd; (Ref. 95038); 6.1 cm SL (female)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 10; Mjukstrålar i analfenan: 12; Ryggkotor: 40 - 41. Distinguished from other species of Opsariichthys by the following combination of characters: maxillary barbels absent; anterior notch on tip of upper lip absent; 41 scales on lateral line; 13-14 pre-dorsal scales; body width narrow; maxillary extending to or slightly beyond vertical of anterior margin of orbit; a series of two rows with 12-15 rounded tubercles on lower jaw; pectoral fin extending to origin of ventral fin in adult male; and snout and ventral side of head orange red in adult male in life (Ref. 95038).
Body shape (shape guide): fusiform / normal.
Inhabits the upper reach of stream with moderate velocity of clear water and substrate of small and medium pebbles and boulders (Ref. 95038).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Huynh, T.Q. and I.-S. Chen, 2013. A new species of cyprinid fish of genus Opsariichthys from Ky Cung-Bang Giang River basin, Northern Vietnam with notes of the taxonomic status of the genus from Northern Vietnam and Southern China. J. Mar. Sci. Tech. 21(Suppl:)135-145. (Ref. 95038)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (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=0.00851 (0.00404 - 0.01792), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Resiliens (Ref. 120179) |
Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.). |
Sårbarhet i fisket (Ref. 59153) |
Low vulnerability (14 of 100). 🛈 |