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); sinus: Latin for bay or gulf, referring to its apparent restriction to the midriff area of the Gulf of California, México (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien bathydemersaal; standvastig; diepte 198 - 1330 m (Ref. 31276). Deep-water
Eastern Central Pacific: Gulf of California.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 48.1 cm TL mannelijk / geslacht onbekend; (Ref. 31276)
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | 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 ).
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: Version 2024-1)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
Tools
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Estimates based on models
Preferred temperature (Ref.
123201): 5.8 - 12.1, mean 8.2 °C (based on 30 cells).
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00094 - 0.00444), b=2.93 (2.74 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 4.1 ±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 vulnerability (38 of 100).
