Bagrus docmak, Semutundu : fisheries, gamefish

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Bagrus docmak (Fabricius, 1775)

Semutundu
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Bagrus docmak
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Classificação / Names Nomes comuns | Sinônimos | Catalog of Fishes(Gênero, Espécies) | ITIS | CoL | WoRMS | Cloffa

> Siluriformes (Catfishes) > Bagridae (Bagrid catfishes)
Etymology: Bagrus: Mozarabic, bagre, taken from Greek, pagros = a fish (Dentex sp.) (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range Ecologia

; Água doce bentopelágico; pH range: 6.5 - 8.2; dH range: ? - 30; intervalo de profundidade 0 - 80 m (Ref. 34291), usually 0 - 70 m (Ref. 34291). Tropical; 21°C - 25°C (Ref. 2060)

Distribuição Países | Áreas da FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

Africa: widely distributed throughout Tchad, Niger, Volta, Senegal (Ref. 57125), Mono, Oueme, Cross and Sanaga Rivers, as well as the Rift Valley Lakes Edward, George, Albert, Victoria and Tanganyika (Ref. 81641), but not Lake Kivu (Ref. 46152). Widely distributed in Nile system (Ref. 28714, 31439, 58460). In the Lukuga River (Lake Tanganyika outflow), known up to the Kisimba-Kilia rapids (Ref. 93587).

Comprimento de primeira maturação / Tamanho / Peso / Idade

Maturity: Lm 22.7, range 20 - 25.9 cm
Max length : 127 cm TL macho/indeterminado; (Ref. 42492); common length : 62.0 cm TL macho/indeterminado; (Ref. 11248); peso máx. publicado: 35.0 kg (Ref. 4537); idade máx. registrada: 5 anos (Ref. 11248)

Descrição suscinta Morfologia | Morfometria

Espinhos dorsais (total): 1; Raios dorsais (total): 8-11; Espinhos anais 0; Raios anais : 11 - 14; Vértebras: 46 - 49. Diagnosis: head depressed (Ref. 43434), broad, about 1.3-1.6 times as long as wide (Ref. 28714, 30488, 57125), squarish when viewed from above (Ref. 28714), without rough texture (Ref. 3034). Head width measured at base of preopercle 58.9-71.8% head length; 12-16 gill rakers on first gill arch (Ref. 81641). Body slightly elongated, 5-6 times longer than deep (Ref. 7324, 57125, 81641). Four pairs of barbels (Ref. 34290). Premaxillary tooth plate 5-7 times longer than wide, a little shorter than and about as broad as the band of vomerine teeth (Ref. 2988). Premaxillary toothplate width less than 2.5 times in head length (Ref. 57125). Occipital process 3-5 times longer than wide (Ref. 57125, 81641). Predorsal length 2.4-2.7 times in standard length; 9-10 branched dorsal fin rays, not or only slightly filamentous (Ref. 57125, 81641). Long adipose dorsal fin present (Ref. 34290). Standard length/caudal peduncle length 2.4-2.7 (Ref. 57125). Upper lobe of caudal fin often with a short filament (Ref. 7324, 57125, 81641).

Biologia     Glossário (p.ex. epibenthic)

Inhabit lakes, swamps and rivers (Ref. 31256). Widespread in both shallow and deep water (Ref. 34291). Probably associated with rocky bottoms/coarse substrates (Ref. 27490). Mostly active during the night and the twilight hours (Ref. 2060). Juveniles may frequent exposed rocky shores (Ref. 12526). Feed on insects, crustaceans, molluscs and fish; some debris and vegetable matter may also be ingested (Ref. 28714). Moderately important as a food species in Lake Victoria, but becoming rare with the appearance of Nile perch (Ref. 4967). Catches decreased strongly in Lake Victoria after the Lates upsurge (Ref. 34291). Predation by Lates and competition with Lates (for haplochromines) may have played a role in the decline (Ref. 34291). A notably recovery in waters between 3m and 6m depth in Lake Victoria has been reported (Ref. 51900). Second most important food species in Lake Edward, Congo (Ref. 13302).

Ciclo de vida ou comportamento de acasalamento Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

Distinct pairing (Ref. 205).

Referência principal Upload your references | Referências | Coordenador | Colaboradores

Risch, L.M., 1992. Bagridae. p. 395-431. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres d'Afrique de l'Ouest. Tome 2. Coll. Faune Tropicale N° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren, Belgique and O.R.S.T.O.M., Paris, France. (Ref. 7324)

Status na Lista Vermelha da UICN (Ref. 130435)

  Segura ou pouco preocupante (LC) ; Date assessed: 20 April 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para os humanos

  Harmless





Uso pelos humanos

Pescarias: espécies comerciais; peixe esportivo: sim
FAO - Publication: search | FishSource |

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Estimates based on models

Índice de diversidade filogenética (Ref. 82804):  PD50 = 0.5005   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00730 - 0.01193), b=3.00 (2.94 - 3.06), in cm total length, based on LWR estimates for this species (Ref. 93245).
Nível Trófico (Ref. 69278):  4.1   ±0.95 se; based on food items.
Resiliência (Ref. 120179):  médio(a), tempo mínimo de duplicação da população 1,4 - 4,4 anos (tm-2-3; tmax=5; K=0.06-0.35; Fec=2,000-774,000).
Fishing Vulnerability (Ref. 59153):  High to very high vulnerability (75 of 100).
Categoria de preço (Ref. 80766):   Unknown.
Nutrients (Ref. 124155):  Calcium = 31.3 [14.9, 70.7] mg/100g; Iron = 0.908 [0.503, 1.791] mg/100g; Protein = 16.8 [15.5, 18.2] %; Omega3 = 0.389 [0.125, 1.148] g/100g; Selenium = 116 [42, 289] μg/100g; VitaminA = 45.1 [12.5, 160.7] μg/100g; Zinc = 1.18 [0.76, 1.82] mg/100g (wet weight);