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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).

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

; sötvatten bentopelagisk. Tropical

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Asia: Mekong, Irrawaddy, Salween, Red River and Nanpangjiang basins (Ref. 43281). Introduced in Kazakhstan where it is now abundant; established in lower Kuban drainage; spreading in Azov basin, discovered in River Obitochnaya, Ukraine in 2003 (Ref. 59043).

Size / Vikt / Age

Maturity: L_m ? range ? - ? cm
Max length : 3.1 cm SL hane/ej könsbestämd; (Ref. 43281); rapporterad maxålder: 1.00 år (Ref. 59043)

Short description Bestämningsnycklar | Morfologi | Morfometri

Mjukstrålar i analfenan: 18 - 20.

Adults occur in swamps, marshes, rice fields, backwaters, stream stretches with stagnant water and dense vegetation (Ref. 59043). In Fuxian Lake, China, they are found in upper and middle layers of shallow coastal waters (Ref. 26717). Adults feed mainly on filamentous algae and zooplankton (Ref. 26717). They mature in 3 months time. Spawning occurs between April and September when temperature rises above 26°C. Can tolerate temperatures from 0 to 42°C, surviving winter under ice (Ref. 59043).

Life cycle and mating behavior Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

A cluster of eggs, about 15-50, are spawned every few days in the morning and females carry them for a few hours, until the eggs are entangled into aquatic vegetation by the filaments which cover them. Eggs hatch in 10-12 days at 24°C (Ref. 59043).

Main reference Upload your references | referenser | Koordinator : Seegers, Lothar | Medarbetare

Yang, J.-X., 1991. The fishes of Fuxian Lake, Yunnan, China, with description of two new species. Ichthyol. Explor. Freshwat. 2(3):193-202. (Ref. 26717)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 21 February 2011

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

Ytterligare information

Trophic ecology
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Estimates based on models

Phylogenetic diversity index (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).

Trofisk nivå (Ref. 69278): 2.7 ±0.31 se; based on food items.

Generation time: 0.4 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.

Resiliens (Ref. 120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (Assuming fec < 100).

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

Oryzias sinensis Chen, Uwa & Chu, 1989