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Siluriformes (Catfishes) >
Siluridae (Sheatfishes)
Etymology: Wallago: wallago;Bleeker, in 1851, took the Indian fish name, gave it generic range and used it connection with a new species. The name is "walaga" in Telugu / Tamil (Ref. 45335).
More on authors: Bloch & Schneider.
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce; estuarina demersal; potamódromo (Ref. 37770). Tropical; 22°C - 25°C (Ref. 2060); 38°N - 10°S
Asia: Pakistan to Viet Nam and Indonesia. Reported from Afghanistan (Ref. 39701). Lower risk - near threatened status in Western Ghats, India (Ref. 44149).
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 240 cm TL macho/indeterminado; (Ref. 6028); common length : 75.0 cm TL macho/indeterminado; (Ref. 6028)
Descrição suscinta
Chaves de identificação | Morfologia | Morfometria
Raios dorsais (total) : 5; Raios anais : 77 - 97. Head broad, snout depressed. Body elongate, strongly compressed. Mouth very deeply cleft, its corner reaching far behind eyes. Teeth in jaws set in wide bands; vomerine teeth in two small patches. Barbels two pairs; maxillary barbels extending to anterior margin posterior of anal fin, mandibulary barbels to angle of mouth. Eyes small, with a free orbital margin. Dorsal fin small, anal fin very long (Ref. 4792). Mandibular barbel longer than pelvic fin; 24-30 gill rakers on the first arch (Ref. 12693). Eye in front of vertical through corner of mouth (Ref. 43281).
Found in large rivers, lakes and tanks. A large, voracious and predatory catfish which thrives in heels with grassy margin (Ref. 6028); mostly hides under holes in river banks and canals (Ref. 44149). Associated with deep, still or slow-flowing water with a mud or silt substrate (Ref. 6028). Sluggish and stays on muddy or silty bottom in search of food. Juveniles feed mainly on insects; adults feed on smaller fish, crustaceans, and mollusks. Oviparous, distinct pairing possibly like other members of the same family (Ref. 205). Abundant during the warm season; a pre-monsoon summer breeder. In the Mekong, it is reported to migrate to smaller streams, canals and to the floodplain during the flood season (Ref. 37770). When the water level in the Mekong drops and the flood recedes, it moves to the Mekong or larger tributaries, where it stays in deep pools until the next inundation period (Ref. 37770). Destructive to other more valuable food-fishes. Bites strongly if handled, with its huge mouth, formidable jaws, and band of conical teeth. Threatened due to over harvesting (Ref. 58490).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Talwar, P.K. and A.G. Jhingran, 1991. Inland fishes of India and adjacent countries. Volume 2. A.A. Balkema, Rotterdam, i-xxii + 543-1158, 1 pl. (Ref. 4833)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2024-1)
Ameaça para os humanos
Traumatogenic
Uso pelos humanos
Pescarias: espécies comerciais; peixe esportivo: sim
Ferramentas
Relatórios especiais
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Fontes da internet
Estimates based on models
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00562 (0.00465 - 0.00681), b=2.99 (2.94 - 3.04), in cm total length, based on LWR estimates for this species (Ref.
93245).
Nível Trófico (Ref.
69278): 3.7 ±0.56 se; based on food items.
Resiliência (Ref.
120179): Elevada, tempo mínimo de duplicação da população menor que 15 meses (Fec = 66,070; K=0.6;).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
Nutrients (Ref.
124155): Calcium = 84.8 [34.8, 224.1] mg/100g; Iron = 0.673 [0.340, 1.430] mg/100g; Protein = 15.6 [14.0, 17.6] %; Omega3 = 0.115 [0.054, 0.254] g/100g; Selenium = 78.4 [37.7, 185.3] μg/100g; VitaminA = 4.96 [1.12, 20.49] μg/100g; Zinc = 0.373 [0.244, 0.720] mg/100g (wet weight); based on
nutrient studies.
