Myxines (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); longipinnis: longus (L.), long; pinnis (L.) fins, referring to well-developed fold on ventral fins that extends to branchial region. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Écologie
marin démersal; non migrateur; profondeur 14 - 40 m (Ref. 85052). Temperate
Eastern Indian Ocean: Off Robe and off Cape Douglas, South Australia.
Taille / Poids / Âge
Maturity: Lm ? range ? - ? cm
Max length : 62.7 cm TL mâle / non sexé; (Ref. 85052)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
This species is distinguished from all its congeners by its ventral fin fold beginning anterior to the first pair of gill apertures (within anterior 27-28% TL) (Ref. 85052).
Occurs on soft bottoms of the continental shelf (Ref. 7300). Maximum depth from Ref. 58018.
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larves
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 ).
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)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
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Sources Internet
Estimates based on models
Preferred temperature (Ref.
123201): 15 - 18.7, mean 17.4 °C (based on 24 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 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).
Niveau trophique (Ref.
69278): 4.2 ±0.41 se; based on food items.
Résilience (Ref.
120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (45 of 100).
