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Myxini (slijmprikken) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: hepta (Gr.), seven; tretos (Gr.), perforated (i.e., with holes), referring to seven gill apertures on what would later be described as Homea banksii (=E. cirrhatus) [range within genus is 6-14 pairs of gill apertures]. (See ETYFish); okinoseanus: -anus, Latin adjectival suffix that means, when attached to a name, “belonging to”: Okinose, Honshu Island, Japan, type locality. (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range Ecologie

marien bathydemersaal; standvastig; diepte 300 - 1020 m (Ref. 31545). Deep-water

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Northwest Pacific: Taiwan (Ref. 5193) and southern Japan.

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 80.0 cm TL mannelijk / geslacht onbekend; (Ref. 559)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Gill pouches and gill apertures 8, with the latter arranged in a straight line, loosely spaced (Ref. 31545). Fused cusps 3/2, total cusps 44-49. Total slime pores 87-97. Eyespots present. Ventral finfold well developed. Caudal finfold well developed only from the tip of the tail dorsally to above origin of cloaca (Ref. 51420).

Levenscyclus en paargedrag Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven

Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Ref. 51361 ).

Hoofdreferentie Upload your references | Referenties | Coördinator | Medewerkers

Fernholm, B., 1998. Hagfish systematics. p. 33-44. In J.M. Jørgensen, J.P. Lomholt, R.E. Weber and H. Malte (eds.) The biology of hagfishes. Chapman & Hall, London. 578 p. (Ref. 31276)

Status op de Rode Lijst van het IUCN (Ref. 130435)

Niet bedreigd (LC) ; Date assessed: 13 November 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

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Estimates based on models

Preferred temperature (Ref. 123201): 7.3 - 13.6, mean 9.1 °C (based on 27 cells).

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00204 (0.00092 - 0.00452), b=2.93 (2.73 - 3.13), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trofisch niveau (Ref. 69278): 4.3 ±0.7 se; based on size and trophs of closest relatives

Weerstandsvermogen (Ref. 120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (52 of 100).

Eptatretus okinoseanus (Dean, 1904)