Classificatie / Names
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Cypriniformes (Carps) >
Cyprinidae (Minnows or carps) > Acrossocheilinae
Etymology: Onychostoma: Greek, onyx, -ychos = nail + Greek, stoma = mouth (Ref. 45335); dongnaiense: Named in reference to its type locality, middle Dong Nai drainage..
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water benthopelagisch; pH range: 7.0 - 7.6. Tropical; 26°C - 28°C (Ref. 102622)
Asia: Middle Dong Nai drainage in Vietnam.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 2.0 cm SL mannelijk / geslacht onbekend; (Ref. 102622)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 12; Anale zachte stralen: 8. Onychostoma dongnaiensis can be diagnosed from other species of Onychostoma by a combination of the following characters: mouth wide (width 1.4?1.6 times in HW); 14-15 predorsal scales; body depth high (3.1?3.4 times in SL); eye diameter small (4.2?4.9 times in HL), barbels absent in adults and juveniles; dorsal fin with a strong serrated last simple ray; and dorsal-fin length high (3.8?4.5 times in SL) (Ref. 102622).
Inhabits clear water but also lives in silty water. Occurs in swift currents over bedrock, large boulders and cobble substrates covered with periphyton. Feeds on algae and animals living in the algae. Shares habitat with Mystacoleucus obtusirostris, Osteochilus vittatus, Poropuntius deauratus, Channa gachua, Yasuhikotakia morleti, and Acantopsis dialuzona. The following water conditions were recorded: Dissolved oxygen 82.7−91.4%; conductivity 12−25 μS.cm-1 ; and flow velocity 0.12−0.77 m/s (Ref. 102622).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Hoang, H.D., H.M. Pham and N.T. Tran, 2015. Two new species of shovel-jaw carp Onychostoma (Teleostei: Cyprinidae) from southern Vietnam. Zootaxa 3962(1):123-138. (Ref. 102622)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00435 - 0.02094), b=3.08 (2.88 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
