Oryzias nebulosus

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Oryzias nebulosus Parenti & Soeroto, 2004

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Oryzias nebulosus
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> Beloniformes (Needle fishes) > Adrianichthyidae (Ricefishes) > Oryziinae
Etymology: Oryzias: Greek, oryza = rice; because of the habitat used by this fish (Ref. 45335);  nebulosus: The specific name, nebulosus, misty or foggy, connotes a species previously unrecognized among the melanistic Oryzias in Lake Poso..

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

; zoet water benthopelagisch. Tropical; 1°S - 3°S, 120°W - 121°W (Ref. 54508)

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Asia: Endemic to Lake Poso and its tributary stream, Sulawesi, Indonesia.

Grootte / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 3.3 cm SL mannelijk / geslacht onbekend; (Ref. 54508)

Korte beschrijving Morfologie | Morfometrie

Dorsale zachte stralen (totaal): 9-11; Anale zachte stralen: 21 - 22; Wervels: 30 - 32. Having a unique sexual dichromatism: adult males dark gray to black in color, while females lighter grayish-yellow to brown. Some adult males possess external conical teeth on the jaws. Lateral process of pelvic bone is in line with the third or fourth pleural rib; precaudal vertebrae 11-13, modally 12; and dorsal fin relatively anterior (origin above 12-14th anal-fin ray); straight, narrow and slender ossified and cartilaginous portions of the gill arches. Dorsal body profile arches gently from head to dorsal-fin origin (Ref. 54508).

Biologie     Verklarende woordenlijst (bv. epibenthic)

Collected in the morning in clear water over a bottom of sand, pebbles and fallen branches and during night time from a boat traveling along the lake shore, including the mouth of the tributary stream (Ref. 54508). Infested with parasitic copepods, Lernaea sp. (Ref. 54508).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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Parenti, L.R. and B. Soeroto, 2004. Adrianichthys roseni and Oryzias nebulosus, two new ricefishes (Atherinomorpha: Beloniformes: Adrianichthyidae) from Lake Poso, Sulawesi, Indonesia. Ichthyol. Res. 51:10-19. (Ref. 54508)

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Gevoelig (NT) (B1b(iii)); Date assessed: 16 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00190 - 0.01207), b=3.13 (2.91 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.3   ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Assuming fec < 100).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).