Actinopterygii (Straalvinnigen) >
Osteoglossiformes (Bony tongues) >
Osteoglossidae (Arowanas)
Etymology: Scleropages: Greek, skleros = hard + Greek, page, -es = knot (Ref. 45335).
Omgeving / Klimaat / Range
Ecologie
; zoetwater benthopelagisch. Tropical; 24°C - 30°C (Ref. 2060), preferred ?
Asia: Southern Myanmar to Malay Peninsula and Indonesia, eastern Thailand to Cardamon Range. International trade banned (CITES I, since 1.7.75).
Length at first maturity / Size / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 90.0 cm TL mannelijk/geslacht niet bekend; (Ref. 6398)
With 1 pair of barbels; scales large.
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.
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).
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)
Status op de Rode Lijst van het IUCN (Ref. 115185)
Gevaarlijk voor mensen
Harmless
Gebruik door de mens
Visserij: commercieel; Aquarium: van groot commercieel belang
Tools
Speciale rapporten
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Estimates of some properties based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 0.5781 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00363 (0.00140 - 0.00941), 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): 3.9 ±0.63 se; Based on food items.
Weerstandsvermogen (Ref.
69278): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (tm = 3-4; Fec = 50 (in concrete tanks)).
Kwetsbaarheid (Ref.
59153): Moderate to high vulnerability (47 of 100) .
