Eptatretus hexatrema, Sixgill hagfish

Eptatretus hexatrema (Müller, 1836)

Sixgill hagfish
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Eptatretus hexatrema   AquaMaps   Data sources: GBIF OBIS
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Eptatretus hexatrema
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Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Mixini (Missine) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: Greek, epta = seven + Greek, tretos, -e, -on = with holes (Ref. 45335).  More on author: Müller.

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

; marino demersale; non migratori; distribuzione batimetrica 10 - 400 m (Ref. 36731), usually 10 - 45 m (Ref. 31276).   Subtropical; 23°S - 35°S

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Southeast Atlantic: known only from Walvis Bay, Namibia to Durban, South Africa.

Size / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 80.0 cm TL maschio/sesso non determinato; (Ref. 36731)

Biologia     Glossario (es. epibenthic)

Commonly burrows in muddy bottoms (Ref. 27121). Feeds mostly by scavenging on dead or disabled fish (Ref. 27121).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

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 | Bibliografia | Coordinatore | Collaboratori

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. 120744)

  Least Concern (LC) ; Date assessed: 11 November 2009

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

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Informazioni ulteriori

Stati
Aree FAO
Ecosystems
Presenze
Introduzioni
Stocks
Ecologia
Dieta
Prede
Consumo di cibo
Razione
Nomi Comuni
Sinonimi
Metabolismo
Predatori
Ecotossicologia
Riproduzione
Maturità
Deposizione
Spawning aggregation
Fecundity
Uova
Egg development
Age/Size
Accrescimento
Length-weight
Length-length
Length-frequencies
Morfometria
Morfologia
Larve
Dinamica popolazioni larvali
Reclutamento
Abbondanza
Bibliografia
Acquacoltura
Profilo di acquacoltura
Varietà
Genetica
Frequenze alleliche
Ereditarietà
Malattie
Elaborazione
Mass conversion
Collaboratori
Immagini
Stamps, Coins Misc.
Suoni
Ciguatera
Velocità
Modalità di nuoto
Area branchiale
Otoliths
Cervelli
Vista

Strumenti

Special reports

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Fonti Internet

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia(Go, ricerca) | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 16.6 - 25.7, mean 23.8 (based on 34 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00094 - 0.00446), b=2.92 (2.72 - 3.12), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.5   ±0.55 se; Based on food items.
Resilienza (Ref. 120179):  Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec assumed to be <100).
Vulnerability (Ref. 59153):  Moderate to high vulnerability (46 of 100) .