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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. [...] 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
Ökologie
; süßwasser demersal. Tropical
Africa: Known only from the Bagbé and Rokel Rivers in Sierra Leone.
Size / Gewicht / Alter
Maturity: Lm ?  range ? - ? cm
Max length : 18.7 cm SL Männchen/unbestimmt; (Ref. 2915)
Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 21 - 23; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 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.
Life cycle and mating behavior
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven
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 Rote Liste Status (Ref. 130435: Version 2024-2)
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Tools
Zusatzinformationen
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Internet Quellen
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).
Trophic level (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Widerstandsfähigkeit (Ref.
120179): hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (13 of 100).