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Scleropages formosus (Müller & Schlegel, 1840)

Asian bonytongue
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Scleropages formosus
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Indonesia country information

Common names: Arwana, Asian bonytongue, Ikan siluk
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: commercial | Ref:
Aquaculture: commercial | Ref: Kottelat, M. and E. Widjanarti, 2005
Regulations: protected | Ref: Kottelat, M. and T. Whitten, 1996
Uses: live export: yes;
Comments: Known from Sumatra and Borneo (Ref. 36654). Recorded from Danau Sentarum National Park (Ref. 56749). Museum: Kapuas, MZB 3010 (Ref. 2091). Protected by Indonesian law (Ref. 12217) and CITES I and II. This has been bred in captivity by several companies in Pontianak and Indonesia has been allowed to export a given number of captive bred individuals per year. As a result of this captive breeding, juveniles are the most exported commodity which coincided with a change of trade practices in the Kapuas Lakes area. In 1995, fishermen reported that adults were released and juveniles were grown, occasionally obtained from the mouthbrooding parent. This indicates that a part of the juveniles exported as captive bred originate from the wild (Ref. 56749). The species exhibit several colors: red, gold, pink and green; and the market price very much depend on the color with red being the most expensive and green the cheapest (Godi [ggodi@writeme.com], pers. comm.). Also Ref. 4835.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/id.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Kottelat, M., A.J. Whitten, S.N. Kartikasari and S. Wirjoatmodjo, 1993
National Database:

Common names from other countries

Classification / Names Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Osteoglossiformes (Bony tongues) > Osteoglossidae (Arowanas)
Etymology: Scleropages: Greek, skleros = hard + Greek, page, -es = knot (Ref. 45335).
  More on authors: Müller & Schlegel.

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

; eau douce benthopélagique.   Tropical; 24°C - 30°C (Ref. 2060)

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Asia: Southern Myanmar to Malay Peninsula and Indonesia, eastern Thailand to Cardamon Range.

Length at first maturity / Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 90.0 cm TL mâle / non sexé; (Ref. 6398)

Description synthétique Morphologie | Morphométrie

With 1 pair of barbels; scales large.

Biologie     Glossaire (ex. epibenthic)

Occurs in tannin stained blackwater streams (Ref. 12693). Found in forest covered streams including peat adjacent areas. Take around three months for free swimming fries (Ref. 57235). Young individuals feed on insects at the water surface, adults take fishes (Ref. 12693, 57235) and smaller vertebrates (Ref. 56749). A mouth brooder, young about 6 cm at birth (Ref. 7050, 57235). Valued as an aquarium fish, its flesh commands a moderate price.

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

From an observation of a breeding pair in a concrete tank, courtship lasts from several weeks to months. During this stage, the breeding pair swims near the water surface usually at night. "The male chases the female around the perimeter of the tank. Sometimes, the pair circle each other nose-to-tail. About one to two weeks before spawning takes place, the fish swim side by side with their bodies touching. Eventually, the female releases a cluster of orange-red eggs. The male fertilises the eggs and then scoops them into its mouth where it incubates them. After hatching which occurs in about a week, the young larvae continue to live in the male's mouth for 7-8 weeks more until the yolk sac is totally absorbed" (Ref. 57886).

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Kottelat, M., 2013. The fishes of the inland waters of Southeast Asia: a catalogue and core bibliography of the fishes known to occur in freshwaters, mangroves and estuaries. The Raffles Bulletin of Zoology 2013 (Suppl. 27):1-663. (Ref. 94476)

Statut dans la liste rouge de l'IUCN (Ref. 130435)

  Menacé (EN) (A2cd+4cd); Date assessed: 03 June 2019

CITES (Ref. 128078)


CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless




Utilisations par l'homme

Pêcheries: commercial; Aquarium: hautement commercial
FAO(pêcheries: production; publication : search) | FishSource |

Plus d'informations

Noms communs
Synonymes
Métabolisme
Prédateurs
Écotoxicologie
Reproduction
Maturité
Frai
Fécondité
Œufs
Développement de l'œuf
Taille/Âge
Croissance
Longueur-poids
Longueur-longueur
Fréquences de longueurs
Morphométrie
Morphologie
Larves
Dynamique des populations larvaires
Recrutement
Abondance
Références
Aquaculture
Profil d'aquaculture
Souches
Génétique
Electrophoreses
Héritabilité
Pathologies
Traitement
Mass conversion
Collaborateurs
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Type de nage
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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5781   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00417 (0.00172 - 0.01010), b=3.10 (2.89 - 3.31), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Niveau trophique (Ref. 69278):  3.9   ±0.63 se; based on food items.
Résilience (Ref. 120179):  Faible, temps minimum de doublement de population : 4,5 à 14 années (tm = 3-4; Fec = 50 (in concrete tanks)).
Fishing Vulnerability (Ref. 59153):  High vulnerability (56 of 100).
Catégorie de prix (Ref. 80766):   Unknown.