Pollimyrus isidori, Elephant Fish : aquarium

Pollimyrus isidori (Valenciennes, 1847)

Elephant Fish
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Pollimyrus isidori
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Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Pollimyrus: Because of Dr. Max Poll, ichthyologist + Greek, myros, -ou = the male of the morey eel.
Eponymy: Dr Max Fernand Leon Poll (1908–1991) was a Belgian ichthyologist, and ‘connoisseur of the fish fauna’. [...] Isidore Geoffroy Saint-Hilaire (1805–1861) was a French zoologist. [...] (Ref. 128868), visit book page.
More on author: Valenciennes.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser demersal; pH range: 6.0 - 8.0; dH range: 5 - 19; potamodrom (Ref. 51243). Tropical; 22°C - 24°C (Ref. 12468)

Verbreitung Territorien | FAO Gebiete | Ökosysteme | Vorkommen | Punkt Karte | Einführungen | Faunafri

Africa: Senegal (Ref. 2915), Gambia, middle Niger (Ref. 3203) including the Benue (Ref. 2915), Volta and Chad basins, coastal rivers of Côte d'Ivoire (Sassandra, Bandama, Mé) and the Nile (Ref. 3203). Subspecies Pollimyrus isidori fasciaticeps and Pollimyrus isidori osborni are restricted to the Congo river basin (Ref. 3203).

Länge bei der ersten Reifung / Größe / Gewicht / Alter

Geschlechtsreife: Lm 6.5  range ? - ? cm
Max length : 10.3 cm TL Männchen/unbestimmt; (Ref. 57961); max. veröff. Gewicht: 7.00 g (Ref. 3799)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 17 - 22; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 21 - 27. Body depth 2.8-4.2 x SL. Sokomo and Comoe forms longer with SL/Depth ratio 3-4. Head 3.8-5.0 x SL. Eye diameter 3.3-6.4 x head length. Dorsal origin slightly behind anal fin origin. Pectorals slightly shorter or equal to head length, 2-3 x longer than pelvic fins, its posterior end reaching past origin of pelvic fins. Caudal peduncle height 2.3-3.9 x of its length, 12.3-20.6 x SL. Middle reaches fish silvery in color with lots of small spots on sides and head, higher reaches fish darker with darker and fewer spots.
Body shape (shape guide): fusiform / normal; Cross section: compressed.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Occupies floodplain pools in Sudd. Feeds on mud, vegetable debris and small invertebrates (Ref. 28714). Affinities: only to P. adspersus, morphologically similar; distinguished through scales on caudal peduncle, dorsal and anal fin rays and body coloration. Generates electric organ discharge (EOD) of short duration (0.08 ms) that seems to correlate with aggregative behavior of the species (Ref. 10460; 10601). During the breeding season, males build nests and while patrolling their territory sporadically emit EODs at a mean rate of 18 Hz. Participating females, on the other hand, discharge at a fairly regular rate (8-11 Hz) and this has been shown to play a role in sex recognition during courtship and spawning. Male and female EOD waveforms also differ in the amplitude ratio of the first and third phase (Ref. 10764). Also produce natural sounds ('grunts', 'moans', 'growl', etc.) at different phases of courtship, nesting and territorial defense (Ref. 10832). A fractional spawner; females able to spawn up to 26 times in the course of one reproductive cycle, laying about 125 eggs per spawning episode. Larval electric organ situated in the deep lateral musculature; that of adults in the caudal peduncle (Ref. 10605).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

30-200 eggs are spawned evey 5-8 days. Male builds nest and tends eggs and larvae. Eggs hatch after 4 days and feed after 12 days.

Hauptreferenz Laden Sie Ihre Referenzen hoch | Referenzen | Koordinator | Partner

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 2025-2 (Global))

  nicht bedroht (LC) ; Date assessed: 03 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: nicht kommerziell; Aquarium: Kommerziell
FAO - Publication: search | FishSource |

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AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher Einträge suchen | CISTI | Catalog of Fishes: Gattung, Arten | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | Öffentliche Aquarien | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Gehe zu, Suchen | World Records Freshwater Fishing | Zoologischer Rekord

Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00648 - 0.02132), b=2.82 (2.66 - 2.98), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophische Ebene (Ref. 69278):  2.6   ±0.22 se; based on food items.
Widerstandsfähigkeit (Ref. 120179):  hoch, Verdopplung der Population dauert weniger als 15 Monate. (tm=0.5).
Anfälligkeit der Fischerei (Ref. 59153):  Low vulnerability (10 of 100). 🛈
Nährstoffe (Ref. 124155):  Calcium = 492 [244, 1,584] mg/100g; Iron = 3.22 [1.38, 7.00] mg/100g; Protein = 17.3 [14.8, 19.8] %; Omega3 = 0.606 [0.206, 1.757] g/100g; Selenium = 91.2 [29.7, 293.3] μg/100g; VitaminA = 26.9 [8.8, 87.6] μg/100g; Zinc = 3.37 [1.98, 7.02] mg/100g (wet weight);