Erpetoichthys calabaricus, Reedfish : aquarium

Erpetoichthys calabaricus Smith, 1865

Reedfish
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> Polypteriformes (Bichirs) > Polypteridae (Bichirs)
Etymology: Erpetoichthys: Greek, erpeton = creeping thing + Greek, ichthys = fish (Ref. 45335)calabaricus: Named after the locality where the fish was taken: Old Calabar (Ref. 42916).

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water; brak water demersaal; pH range: 6.0 - 8.0; dH range: 5 - 19; diepte 0 - ? m (Ref. 557). Tropical; 22°C - 28°C (Ref. 1672)

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Africa: coastal species, inhabiting river estuaries from Ouémé River in Benin to Sanaga River in Cameroon (Ref. 53784, 81628). Also reported from the Chiloango River (Ref. 1878, 2835, 3188, 42870, 43033, 81263), but this record needs confirmation and needs to be supported by additional material evidence (Ref. 53784, 81628).

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturiteit: Lm 31.4  range ? - ? cm
Max length : 37.0 cm SL mannelijk / geslacht onbekend; (Ref. 81628)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 7 - 13; Dorsale zachte stralen (totaal) : 0; Anale stekels: 0; Anale zachte stralen: 9 - 14; Wervels: 110 - 113. Diagnosis: The dorsal fin is composed of a series of well-separated spines each supporting one or several articulated rays and a membrane (Ref. 42791). Erpetoichthys calabaricus is distinguished from all Polypterus species by its very elongated, anguilliform body and the absence of ventral fin and subopercle (Ref. 2835, 42768, 81263).
Body shape (shape guide): eel-like; Cross section: circular.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Facultative air-breathing (Ref. 126274); Found in slow flowing rivers and standing waters (Ref. 557). Apparently restricted to reedy habitats (Ref. 42768). It moves snake-wise over the bottom, but it can also side-wind quite rapidly through the water (Ref. 42873). Feeds at night on worms, crustaceans and insects (Ref. 7020). Able to breathe air and thus can tolerate low oxygen concentrations. Larvae have external gills and resemble salamander larvae (Ref. 557). The maximum size of 90 cm TL (Ref. 3188) is probably erroneous; the largest size in collections is 37 cm (Ref. 78138).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Parallel swimming courtship; female deposits few eggs between anal fins of male, where they are fertilized and then scattered in vegetation where they immediately stick to substrate. This procedure is repeated many times. Eggs are 2.1-2.6 mm in diameter. Larvae hatch after 70 hours but remain attached to vegetation; 22 days after hatching the yolk sac is absorbed and larvae start feeding.

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Britz, R., 2007. Polypteridae. p. 168-173. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) The fresh and brackish water fishes of Lower Guinea, West-Central Africa. Volume I. Collection Faune et Flore tropicales 42. Institut de Recherche pour le Développement, Paris, France, Muséum National d’Histoire Naturelle, Paris, France, and Musée Royal de l’Afrique Centrale, Tervuren, Belgium. 800 pp. (Ref. 81628)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Gevoelig (NT) (B2a); Date assessed: 07 June 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

Visserij: van geen belang; Aquarium: Commercieel
FAO - Publication: search | FishSource |

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804)
PD50 = 1.0002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00166 (0.00116 - 0.00238), b=3.02 (2.92 - 3.12), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trofisch niveau
(Ref. 69278)
3.3   ±0.40 se; based on food items.
Generation time 1.2 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Weerstandsvermogen
(Ref. 120179)
laag, minimale populatieverdubbelingstijd 4,5-14 jaar (tmax=20; Fec = 264).
Kwetsbaarheid van de visserij
(Ref. 59153)
Low vulnerability (22 of 100). 🛈