Myxini (pirålar) (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); mendozai: In honor of Luis H. “Uchy” Mendoza, captain of the research vessel Crawford from which holotype was collected, for his “experiential knowledge and academic curiosity of the sea, without whose determination and nautical wisdom” the author would never have discovered this hagfish. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Ekologi
marina djupbottenlevande; ej vandrande; djupintervall 720 - 1100 m (Ref. 31276). Deep-water
Western Atlantic: Caribbean Sea.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 45.0 cm TL hane/ej könsbestämd; (Ref. 31276)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Gill apertures 6. Slime pores: prebranchial 13-15; branchial 5-6; trunk 45-48; tail 12-15; total 77-82.
Life cycle and mating behavior
Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Verktyg
Special reports
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Estimates based on models
Preferred temperature (Ref.
123201): 5.6 - 8.2, mean 6.7 °C (based on 18 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).
Trofisk nivå (Ref.
69278): 4.1 ±0.7 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (35 of 100).
