Environment: milieu / climate zone / εύρος βάθους / distribution range
Οικολογία
; Γλυκού νερού; Υφάλμυρο βενθοπελαγικό; pH range: 7.0 - 8.0; dH range: ? - 20; ποταμόδρομος (Ref. 51243); εύρος βάθους 1 - 10 m (Ref. 2686), usually 1 - 2 m (Ref. 4515). Tropical; 23°C - 27°C (Ref. 1672); 35°N - 18°S
Asia: Pakistan to Thailand and south China. Several countries report adverse ecological impact after introduction.
Length at first maturity / Μέγεθος / Βάρος / Age
Γεννητική Ωρίμανση: Lm 18.0, range 23 - ? cm
Max length : 100.0 cm SL αρσενικό/απροσδιόριστο; (Ref. 2686); common length : 61.0 cm TL αρσενικό/απροσδιόριστο; (Ref. 44091); μεγ. δημοσιευμένο βάρος: 3.0 kg (Ref. 40637)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Ραχιαίες άκανθες (συνολικά) : 0; Μαλακές ραχιαίες ακτίνες (συνολικά) : 38 - 43; Εδρικές άκανθες: 0; Μαλακές εδρικές ακτίνες: 23 - 27. Body sub-cylindrical; head depressed; caudal fin rounded (Ref. 2847). The dorsal surface and sides is dark and mottled with a combination of black and ochre, and white on the belly; a large head reminiscent of a snake's head; deeply-gaping, fully toothed mouth; very large scales (Ref. 44091).
Body shape (shape guide): elongated; Cross section: other (see Diagnosi.
Obligate air-breathing (Ref. 126274); Adults inhabit ponds, streams and rivers, preferring stagnant and muddy water of plains (Ref. 41236). Found mainly in swamps, but also occurs in the lowland rivers. More common in relatively deep (1-2 m), still water. Very common in freshwater plains (Ref. 4515, 57235). Occur in medium to large rivers, brooks, flooded fields and stagnant waters including sluggish flowing canals (Ref. 12975). Recorded as having been or being farmed in rice fields (Ref. 119549). Survive dry season by burrowing in bottom mud of lakes, canals and swamps as long as skin and air-breathing apparatus remain moist (Ref. 2686) and subsists on the stored fat (Ref. 1479). Feed on fish, frogs, snakes, insects, earthworms, tadpoles (Ref. 1479) and crustaceans (Ref. 2847). Undertake lateral migration from the Mekong mainstream, or other permanent water bodies, to flooded areas during the flood season and return to the permanent water bodies at the onset of the dry season (Ref. 37770). During winter and dry season, its flesh around coelomic cavity is heavily infested by a larval trematode Isoparorchis hypselobargi. Other parasites infecting this fish include Pallisentis ophicephali in the intestine and Neocamallanus ophicepahli in the pyloric caecae (Ref. 1479). Processed into pra-hoc, mam-ruot, and mam-ca-loc (varieties of fish paste) in Kampuchea (Ref.4929). Perhaps the main food fish in Thailand, Indochina and Malaysia (Ref. 2686). Firm white flesh almost bone-free, heavy dark skin good for soup and usually sold separately (Ref. 2686). In Hawaiian waters the largest specimen taken reportedly exceeded 150 cm (Ref. 44091). Very economic important on both cultures and captures throughout southern and southeastern Asia (Ref. 57235).
Breeds in ditches, ponds and flooded paddy fields. Young shoal at the surface and are guarded by the male parent (Ref. 54793), hiding below the surface water (Ref. 1479). In captivity, as soon as the male bends its body close to the female during mating, milt is released following the release of the eggs (Ref. 45162).
Pethiyagoda, R., 1991. Freshwater fishes of Sri Lanka. The Wildlife Heritage Trust of Sri Lanka, Colombo. 362 p. (Ref. 6028)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Potential pest (Ref. 2847)
Human uses
αλιεία: πολύ εμπορικό; Υδατοκαλλιέργειες: Εμπορικό(ά); Ενυδρείο: Δημόσια ενυδρεία
Εργαλεία
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (Αναφ.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00745 - 0.01117), b=2.97 (2.92 - 3.02), in cm total length, based on LWR estimates for this species (Ref.
93245).
Τροφικό Επίπεδο (Αναφ.
69278): 3.6 ±0.47 se; based on food items.
Ελαστικότητα (Αναφ.
120179): Μεσαίο(α), ελάχιστος χρόνος για διπλασιασμό πληθυσμού 1,4 - 4,4 έτη (K=0.21; tm=1.5; Fec = 324).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (40 of 100).
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Nutrients (Ref.
124155): Calcium = 62.8 [31.2, 135.6] mg/100g; Iron = 0.668 [0.466, 0.942] mg/100g; Protein = 17.9 [16.9, 18.7] %; Omega3 = 0.114 [0.058, 0.219] g/100g; Selenium = 35.3 [15.9, 80.3] μg/100g; VitaminA = 23.5 [10.2, 52.3] μg/100g; Zinc = 0.926 [0.672, 1.421] mg/100g (wet weight); based on
nutrient studies.
