分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Osteoglossiformes (Bony tongues)
骨舌魚目 (Bony tongues) >
Mormyridae (Elephantfishes)
象鼻魚科 (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.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 居於水底的; 河川洄游 (Ref. 138143). 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 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 33.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 2915); 最大體重: 458.00 g (Ref. 2915)
背棘 (總數) : 0; 背的軟條 (總數) : 25 - 31; 臀棘: 0; 臀鰭軟條: 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).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
背鰭些微地在臀鰭起源後面。 體高 3.0-4.7 x SL 與梗長度 2.0-3.4 倍於高。
Adults inhabit lakes, lagoons, reservoirs and (irrigation) canals. They are bottom feeding insectivores that breed during the flood season and enters the floodplain for this purpose (Ref. 28714). Thay show 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).
棲息於湖。 底部攝取食物的食蟲動物。 在洪水季節期間進行繁殖並且為這一個目的進入洪泛區。 (參考文獻 28714) 顯示三 '偏愛' 在發電器放電 (在中間-EOD) 之間的間隔模態當休息 : 10-35 ms ， 50-120 ms 與 200-350 ms.(參考文獻 10833)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 04 September 2019
人類使用
漁業: 低經濟
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基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00638 - 0.01972), b=2.86 (2.71 - 3.01), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.0 ±0.37 se; based on food items.
回復力 (參考文獻
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
釣魚的脆弱性 (Ref.
59153): Low to moderate vulnerability (30 of 100).
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