分類 / Names
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. [...] Dr Bernard de Mérona is a biologist with a particular interest in tropical river systems. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的. 熱帶
Africa: Known only from the Bagbé and Rokel Rivers in Sierra Leone.
非洲: 在獅子山已知只來自 Bagbe 與 Rokel 河了。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 18.7 cm SL 雄魚/尚未辨別雌雄; (Ref. 2915)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 0; 背的軟條 (總數) : 21 - 23; 臀棘: 0; 臀鰭軟條: 25 - 29. Median depression on head. SL/Body Depth ratio = 3.7-3.8. Origin of dorsal fin in same level or slightly behind anal fin origin. Pectoral fins shorter than head and the extremities reach the origin of the pelvic fins. Small eyes with diameter 6.0-6.8 x head length. Affinities: close to M. ussheri, differentiated by the number of dorsal fins and the eyes which are smaller relative to the head length. M. mento also found in the area of repartition and distinguished by the number of dorsal and anal fins and the number of scales on the lateral line.
在頭部上的中動脈凹窪。 SL/體高比 =3.7-3.8. 背鰭起點在相同的水平或些微地在臀鰭起源後面。 胸鰭短於頭部而且頂端延伸到腹鰭的起源。 小的眼睛有直徑 6.0-6.8個 x 頭長。 分類相關: 接近 M. ussheri, 藉由背鰭數目區別了，而且眼那是較小的相對於頭長。 M. mento 也發現於分配的區域而且在側線上藉著背鰭與臀鰭的數字與鱗片的數字區別。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
非洲: 在獅子山已知只來自 Bagbe 與 Rokel 河了。
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 2024-2)
瀕危 (EN) (B1ab(iii)); Date assessed: 02 June 2019
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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=0.01288 (0.00577 - 0.02877), b=2.88 (2.71 - 3.05), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (13 of 100).
