Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

Mixines (mixinos) (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); springeri: In honor of American shark biologist Stewart Springer (1906-1991), then with the U.S. Fish and Wildlife Service, “who discovered this interesting cyclostome”. (See ETYFish).

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

marino batidemersal; no migratorio; rango de profundidad 400 - 730 m (Ref. 31276). Deep-water

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Western Central Atlantic: Northeastern Gulf of Mexico.

Tamaño / Peso / Age

Maturity: L_m ? range ? - ? cm
Max length : 59.0 cm TL macho / no sexado; (Ref. 31276)

Short description Claves de identificación | Morfología | Morfometría

Gill apertures 6. Slime pores: prebranchial 16-19; branchial 2-5; trunk 52-57; tail 9-13; total 84-92.

Life cycle and mating behavior Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva

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 ).

Main reference Upload your references | Referencias | Coordinador | Colaboradores

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)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 13 November 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Pesquerías: sin interés

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 8.2 - 14.6, mean 11.3 °C (based on 64 cells).

Phylogenetic diversity index (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).

Nivel trófico (Ref. 69278): 4.2 ±0.7 se; based on size and trophs of closest relatives

Resiliencia (Ref. 120179): Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (44 of 100).

Eptatretus springeri (Bigelow & Schroeder, 1952)