分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Osteoglossiformes (Bony tongues) >
Mormyridae (Elephantfishes)
Etymology: Marcusenius: Becasue of J. Marcusen, author of "Zur Phauna des Schwarzen Meeres", 1867; ichthyologist.
Eponymy: Dr Johann Andreas Marcusen (1817–1894) was a Latvian of German descent who was a physician, ichthyologist and zoologist. [...] (Ref. 128868), visit book page.
More on author: Linnaeus.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的; 河川洄游 (Ref. 51243). 熱帶
Africa: Nile (delta to Bahr-el-Jebel), Niger (Lower Niger and Benoué) and Chad basins (Ref. 3203, 81274).Also reported from the Albert Nile and Aswa River (White Nile basin) in Uganda and from the upper Congo (Ref. 4903), but the latter seems outside the species distribution area and is questionable.
非洲: 尼羅河, Bahr-el-Jebel ，尼日與查德流域的從三角州。 也在 Benoue 河中.(參考文獻 2915) 分類相關: 接近 阿氏異吻象鼻魚〔Marcusenius abadii〕 。 臀鰭鰭條數量, 側線上的鱗片數與背鰭與臀鰭的位置區分兩者。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 33.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 2915); 最大体重: 458.00 g (Ref. 2915)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 0; 背的软条 (总数) : 25 - 31; 臀棘: 0; 臀鳍软条: 30 - 37. Diagnosis: teeth small and conical (Ref. 4903, 81274), arranged in a single series confined to the middle of each jaw, 5-6 in both jaws (Ref. 4903). 16(-18) scales around caudal peduncle (Ref. 4903, 81274). Body depth 3.0-4.7 times in standard length; anal-fin base 0.7-0.9 times in dorsal-fin base (Ref. 81274). Head length 4-5.5 times in SL; upper head profile gently curved; snout 1/3-1/4 length of head; eye 1/2-2/3 length of snout; mouth small, a globular, fleshy swelling on the chin (Ref. 4903). Dorsal fin beginning slightly behind level of anal fin-origin (Ref. 2915, 81274), above the the 6th-9th anal fin ray (Ref. 4903) and comprising 25-31 rays (Ref. 2915, 4903, 81274). 70-92 lateral-line scales (Ref. 4903, 81274). Caudal-peduncle 2.0-3.4 times longer than deep (Ref. 2915, 4903, 81274). Caudal fin partly covered with small scales, its lobes pointed (Ref. 4903).
Coloration: silvery-grey, sometimes dark grey to blackish (Ref. 81274) or dark bluish-green dorsally (Ref. 4903).
背鳍些微地在臀鳍起源后面。 体高 3.0-4.7 x SL 与梗长度 2.0-3.4 倍于高。
Inhabits lakes, lagoons, reservoirs and (irrigation) canals; a bottom feeding insectivore; breeds during the flood season and enters the floodplain for this purpose (Ref. 28714). Shows three 'preferred' modes of intervals between electric organ discharges (inter-EOD) when at rest: 10-35 ms, 50-120 ms and 200-350 ms (Ref. 10833).
栖息于湖。 底部摄取食物的食虫动物。 在洪水季节期间进行繁殖并且为这一个目的进入洪泛区。 (参考文献 28714) 显示三 '偏爱' 在发电器放电 (在中间-EOD) 之间的间隔模态当休息 : 10-35 ms ， 50-120 ms 与 200-350 ms.(参考文献 10833)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
非洲: 尼羅河, Bahr-el-Jebel ，尼日與查德流域的從三角州。 也在 Benoue 河中.(參考文獻 2915) 分類相關: 接近 阿氏異吻象鼻魚〔Marcusenius abadii〕 。 臀鰭鰭條數量, 側線上的鱗片數與背鰭與臀鰭的位置區分兩者。
Bigorne, R., 1990. Mormyridae. p. 122-184. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux saumâtres d'Afrique de l'Ouest. tome 1. Faune Trop. 28. Musée Royal de l'Afrique Centrale, Tervuren, and ORSTOM, Paris. (Ref. 2915)
世界自然保护联盟红皮书 (Ref. 130435: Version 2024-2)
人类利用
渔业: 低经济
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00633 - 0.01990), b=2.86 (2.71 - 3.01), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.0 ±0.37 se; based on food items.
回复力 (Ref.
120179): 中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (30 of 100).
