Hong Kong country information

Common names: Tooth- carp, 闊尾鱂魚
Occurrence: native
Salinity: freshwater
Abundance: occasional (usually not seen) | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Bioluminescent fish (a genetically modified fish - product of flourescent protein extracted from jellyfish and attaching to DNA in embryonic fish) has been imported from Taiwan for aquarium enthusiasts. TK-1 is already being sold in the country (Ref. 48573).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/hk.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Man, S.H. and I.J. Hodgkiss, 1981
National Database:

Common names from other countries

Médaka, Pez-arroz japonés, 青鮰, ... more

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Beloniformes (Needle fishes) > Adrianichthyidae (Ricefishes) > Oryziinae
Etymology: Oryzias: Greek, oryza = rice; because of the habitat used by this fish (Ref. 45335).
More on authors: Temminck & Schlegel.

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

; süßwasser; brackwasser benthopelagisch; pH range: 7.0 - 8.0; dH range: 9 - 19; amphidrom (Ref. 51243). Subtropical; 18°C - 24°C (Ref. 2060); 55°N - 10°N, 85°E - 105°E

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Asia: Japan, Korea, China and Viet Nam. Reported from the middle Nam Theun, Mekong, Irrawaddy, Salween, Red River and Nanpangjiang in basins (Ref. 27732).

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 4.0 cm SL Männchen/unbestimmt; (Ref. 121523)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenweichstrahlen (insgesamt) : 6 - 7; Afterflossenweichstrahlen: 15 - 21; Wirbelzahl: 30 - 31. Meristic characters mainly from Nam Theun, Laos sample only (Ref. 27658). Scale count refers to the scales in longitudinal row (Ref. 41299).

Adults occur in ponds, marshes, paddy fields and small flows of plains (Ref. 41299). They prefer slow-moving streams. Inhabit mainly waters of lowlands and brackish water, and also known to inhabit tide pools of coasts of certain regions in Japan and Korea. They can withstand a wide range of salinity (Ref. 58933). Omnivorous (Ref. 58933). For indoor culture, a diluted sea water is rather better than the freshwater , and the use of a balanced salt solution is recommended, if the tap water proves to be unsuitable (Ref. 58933). Used in experimental research (Ref. 4537). Non-annual breeders. Are easy to maintain in the aquarium (Ref. 27139). A fluorescent ornamental variety (genetically modified fish), a product of fluorescent protein extracted from jellyfish and attaching to DNA in embryonic fish of this is now being sold in the aquarium trade (Ref. 48573).

Life cycle and mating behavior Maturities | Fortpflanzung | Spawnings | Egg(s) | Fecundities | Larven

Carries eggs for some time before deposition (Ref. 7471). Oocytes mature at night followed by ovulation at dawn (Ref. 58942).

Hauptreferenz Upload your references | Referenzen | Koordinator : Seegers, Lothar | Partner

Roberts, T.R., 1998. Systematic observations on tropical Asian medakas or ricefishes of the genus Oryzias, with descriptions of four new species. Ichthyol. Res. 45(3):213-224. (Ref. 27658)

IUCN Rote Liste Status (Ref. 130435)

nicht bedroht (LC) ; Date assessed: 01 March 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

Fischereien: nicht kommerziell; Aquarium: Kommerziell

FAO(Publication : search) | FishSource |

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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).

Trophic level (Ref. 69278): 3.4 ±0.45 se; based on food items.

Widerstandsfähigkeit (Ref. 120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (tm<1; Fec=40).

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

Oryzias latipes (Temminck & Schlegel, 1846)