Bagrus docmak, Semutundu : fisheries, gamefish

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Bagrus docmak (Fabricius, 1775)

Semutundu
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Bagrus docmak
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分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, ) | 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 生態学

; 新鮮な水 底生の漂泳性; pH range: 6.5 - 8.2; dH range: ? - 30; 深さの範囲 0 - 80 m (Ref. 34291), usually 0 - 70 m (Ref. 34291). Tropical; 21°C - 25°C (Ref. 2060)

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | 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).

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm 22.7, range 20 - 25.9 cm
Max length : 127 cm TL オス/雌雄の選別がない; (Ref. 42492); common length : 62.0 cm TL オス/雌雄の選別がない; (Ref. 11248); 最大公表体重: 35.0 kg (Ref. 4537); 最大記録サイズ: 5 年 (Ref. 11248)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 1; 背鰭 (合計): 8-11; 肛門の骨 0; 臀鰭: 11 - 14; 脊つい: 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).

生物学     用語集 (例 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).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

Distinct pairing (Ref. 205).

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

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)

IUCNのレッドリストの状況は (Ref. 130435)

  軽度懸念 (LC) ; Date assessed: 20 April 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 商業; ゲームフィッシュ: はい
FAO - Publication: search | FishSource |

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共通名の
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生態毒性
繁殖
成熟
放精
卵の集合体
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シガテラ(食中毒の名前)
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インターネットの情報源

Estimates based on models

Phylogenetic diversity index (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).
栄養段階 (Ref. 69278):  4.1   ±0.95 se; based on food items.
回復力 (Ref. 120179):  手段, 1.4年~4.4年の倍増期間の最小個体群 (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).
価格帯 (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);