分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes) >
Bagridae (Bagrid catfishes)
Etymology: Bagrus: Mozarabic, bagre, taken from Greek, pagros = a fish (Dentex sp.) (Ref. 45335).
More on author: Boulenger.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的. 熱帶; 1°N - 3°S
Africa: endemic to Lake Victoria (Ref. 51686, 58032).
非洲: 維多利亞湖。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 55.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 52118)
背棘 (总数) : 1; 背的软条 (总数) : 9; 臀鳍软条: 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).
头部多扁平的, 平滑的上方; 长而狭窄的后头骨的活动, 狭窄地与背侧间的硬骨分开; 吻宽广地圆的, 突出的超过下颌.(参考文献 2988) 眼虹膜深色的, 具有一个生动的黄色环.(参考文献 1568) 齿 6-7 倍于宽度的上颌骨前条纹, 短于与如宽的当或稍微窄于牦骨条纹; 上颌骨触须 1.25-2.33 倍于头长, 延伸至胸鳍的末端或稍微超过在成鱼中, 腹面结束当幼鱼时; 鼻骨触须 1/7(成鱼)-头长的 1/3; 外部的颚触须 1.5-1.83 的长度内部的与 0.5-1 倍于头长; 鳃耙相当长的, 廣泛地設定; 背棘平滑的, 少於 0.5 倍於頭長; 背鰭 0.5-0.75 頭長的長軟鰭條; 脂鰭 4-5.5 長度與深度比率, 1.5-1.66 倍長於背鰭; 倍背鰭長度背鰭與脂鰭鰭 0.5-0.66 之間的距離; 胸棘不在成魚鋸齒狀的; 尾鰭深深地分岔, 上葉有長的絲狀突起.(參考文獻 2988)
體色 種暗褐色或深色的鐵-藍色的在上面，微白色或黃銅色的黃色在對黑色的鰭有灰色的之下.(參考文獻 2988) 深色的, 幾乎黑色在背部上, 褪色進入銀色的之內在身體上, 有些許黃色色調了.(參考文獻 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).
在芦苇与纸草捕获了。 (参考文献 36900) 吃小鱼。 (参考文献 36900) 长到 30-40 磅 (=13-18 公斤) 。 (参考文献 36900) 肉是好的。 (参考文献 36900)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
非洲: 維多利亞湖。
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)
人类利用
渔业: 商业性
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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=0.00832 (0.00384 - 0.01800), b=2.95 (2.77 - 3.13), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 4.2 ±0.73 se; based on food items.
回复力 (Ref.
120179): 高度, 族群倍增时间少于 15个月 (Assuming Fec>10,000).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (42 of 100).
