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Actinopterygii (ray-finned fishes) > 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 / Climate / Range Ecology

Freshwater; benthopelagic. Tropical, preferred ?; 1°S - 3°S, 120°W - 121°W (Ref. 54508)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

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

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 3.3 cm SL male/unsexed; (Ref. 54508)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 9-11; Anal soft rays: 21 - 22; Vertebrae: 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).

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).

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Main reference Upload your references | References | Coordinator : Seegers, Lothar | Collaborators

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)

IUCN Red List Status (Ref. 115185)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO(Publication : search) | FisheriesWiki |

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00490 (0.00192 - 0.01252), b=3.13 (2.91 - 3.35), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic Level (Ref. 69278): 3.3 ±0.4 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278): Low, minimum population doubling time 4.5 - 14 years (Assuming fec < 100).

Vulnerability (Ref. 59153): Low vulnerability (10 of 100) .

Entered by Torres, Armi G.

Modified by Bailly, Nicolas

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Oryzias nebulosus Parenti & Soeroto, 2004