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Siluriformes (Catfishes) >
Bagridae (Bagrid catfishes)
Etymology: Bagrus: Mozarabic, bagre, taken from Greek, pagros = a fish (Dentex sp.) (Ref. 45335).
Eponymy: Edward J E Degen (1852–1922) was a Swiss naturalist and ornithologist who lived and worked in Australia, Africa and England; he died in London. [...] (Ref. 128868), visit book page.
More on author: Boulenger.
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt gần đáy. Tropical; 1°N - 3°S
Africa: endemic to Lake Victoria (Ref. 51686, 58032).
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 55.0 cm TL con đực/không giới tính; (Ref. 52118)
Các tia vây lưng cứng (tổng cộng) : 1; Các vây lưng mềm (tổng cộng) : 9; Tia mềm vây hậu môn: 12 - 13. Head much depressed, smooth above; long and narrow occipital processus, narrowly separated from interneural bone; snout broadly rounded, projecting beyond lower jaw (Ref. 2988). Eye iris dark, with a vivid yellow ring (Ref. 1568). Premaxillary band of teeth 6-7 times as long as broad, shorter than and as broad as or a little narrower than the vomerine band; maxillary barbel 1.25-2.33 times head length, extending to end of pectoral fin or a little beyond in adult, to end of ventral in young; nasal barbel 1/7(adult)-1/3 of head length; outer mandibular barbel 1.5-1.83 times length of inner and 0.5-1 times head length; gill-rakers rather long, widely set; dorsal spine smooth, less than 0.5 times head length; longest soft ray of dorsal fin 0.5-0.75 head length; adipose fin 4-5.5 times as long as deep, 1.5-1.66 times as long as dorsal fin; distance between dorsal and adipose fin 0.5-0.66 times dorsal fin length; pectoral spine not serrated in adult; caudal fin deeply forked, upper lobe with long filament (Ref. 2988).
Coloration: species blackish brown or dark steel-blue above, whitish or brassy yellow beneath with grey to blackish fins (Ref. 2988). Dark, nearly black on the back, fading into silver on the body, tinged with yellow (Ref. 36900).
Caught in reeds and papyrus; feeds on small fish; grows up to 30-40 pounds (= 13-18kg); flesh is good and fish is of high economic importance (Ref. 36900).
Life cycle and mating behavior
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
Jayaram, K.C., 1966. Contributions to the study of the fishes of the family bagridae. A systematic account of the African genera with a new classification of the family. Bull. I.F.A.N. (A) 28(3):1064-1139. (Ref. 51686)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Các nghề cá: Tính thương mại
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00408 - 0.01859), b=2.94 (2.76 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 4.2 ±0.73 se; based on food items.
Thích nghi nhanh (Ref.
120179): Chiêù cao, thời gian nhân đôi của chủng quần tối thiểu là dưới 15 tháng (Assuming Fec>10,000).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (42 of 100).
