Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
; স্বাদু পানি তলদেশ বিহারী; পোটামোড্রোমাস (Ref. 51243); গভীরতার পরিসীমা 10 - ? m (Ref. 7248). Tropical; 22°C - 23°C (Ref. 2059); 25°N - 22°S, 16°W - 40°E
Africa: Nile, Congo system, upper and middle Zambezi (Ref. 3820). Reported from Lake Rukwa and the lower Zambezi (Ref. 95585). Also from Lakes Tanganyika and Edward (Ref. 7248). In West Africa known from the Gambia, Upper Senegal, Niger, Benue, Lake Chad, Volta, and coastal basins from Guinea to Nigeria, including the delta of Niger and the Cross river (Ref. 57129). In Lower Guinea present in the Cross and Sanaga in Cameroon and the Ogowe in Gabon (Ref. 81644).
আকৃতি / ওজন / Age
Maturity: Lm ? range ? - ? cm
Max length : 150 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 4967); সবের্াচ্চ প্রকাশিত ওজন : 55.0 kg (Ref. 7248)
পৃষ্ঠীয় কাঁটা (মোট ) : 0; পৃষ্ঠীয় নরম পাখনা দন্ড (মোট ) : 26 - 35; পায়ূর নরম পাখনা্তুন্ড: 42 - 52; কশেরুকা : 55 - 61. Diagnosis: length of rayed dorsal fin 27-36% standard length; 26-35 dorsal-fin rays (Ref. 57129, 81644). Length of adipose fin 24-34% standard length (Ref. 57129, 81644), about equal to the length of the rayed dorsal fin (Ref. 28714). Width of vomerine tooth plate 25.0-32.2%, and width of premaxillary tooth plate 29.5-36.9% head length (Ref. 57129, 81644). Pectoral spine with strong, downward-pointed serrations on the anterior side (Ref. 270, 57129, 81644). Length of pectoral fin 12.7-18.0% SL (mean 16) (Ref. 81644). Posterior part of adipose fin blackish (Ref. 4967, 57129). Caudal fin with a whitish cross-bar (Ref. 57129). Head long, broad and somewhat rectangular in dorsal outline (Ref. 270), its length 28.4-35.9% SL (Ref. 81644). Snout broadly rounded; eyes superolateral in position; frontal fontanelle long and narrow; occipital fontanelle oval-shaped; tooth plates wide; suprabranchial organ well developed; caudal fin barred; openings of secondary canals hardly visible but display a regular pattern (Ref. 270).
Facultative air-breathing (Ref. 126274); An uncommon species which inhabits large rivers (Ref. 4967). Largest freshwater species in southern Africa; occurs in large deep rivers within the mainstream or in deep pools and lakes or backwaters (Ref. 7248, 78218). Most active at night, feeding on any available food, including invertebrates and insects when small, fish and other small vertebrates when large; scavenges off large carcasses and offal from riverside villages; live for 12 or more years (Ref. 7248). Maximum reported size for West Africa and Lower Guinea: 610 mm TL (Ref. 57129, 81643).
Life cycle and mating behavior
পরিপক্কতা | প্রজনন | ডিম ছাড়া | ডিমসমূহ | ডিম্বধারন ক্ষমতা | শুককীট
Teugels, G.G., B. Denayer and M. Legendre, 1990. A systematic revision of the African catfish genus Heterobranchus Geoffroy-Saint-Hilaire, 1809 (Pisces: Clariidae). Zool. J. Linn. Soc. 98:237-257. (Ref. 270)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
মৎস্য: গৌণ বাণিজ্যিক ; এ্যাকুয়াকালচার (জলজ পালন) : বাণিজ্যিক; শিকারযোগ্য মাছ: হঁ্যা
হাতিয়ার
Special reports
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ইন্টারনেট সুত্র
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00607 - 0.00993), b=2.93 (2.86 - 3.00), in cm total length, based on LWR estimates for this species (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 3.7 ±0.66 se; based on food items.
Generation time: 10.0 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
স্থিতিস্থাপক (Ref.
120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (K=0.11; tmax > 11; Fec > 10,000).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (69 of 100).
Nutrients (Ref.
124155): Calcium = 51.6 [22.9, 102.5] mg/100g; Iron = 1.02 [0.53, 1.99] mg/100g; Protein = 16.9 [15.4, 18.6] %; Omega3 = 0.248 [0.091, 0.639] g/100g; Selenium = 131 [55, 297] μg/100g; VitaminA = 19.2 [6.5, 51.2] μg/100g; Zinc = 1.06 [0.68, 1.56] mg/100g (wet weight);
