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Eptatretus deani (Evermann & Goldsborough, 1907)

Black hagfish
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Native range | All suitable habitat | Point map | Year 2050
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Eptatretus deani   AquaMaps   Data sources: GBIF OBIS
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Image of Eptatretus deani (Black hagfish)
Eptatretus deani
Picture by Fernholm, B.

Classification / Names आम नाम | उपशब्द | Catalog of Fishes(वर्ग, प्रजाति) | ITIS | CoL | WoRMS | Cloffa

मिक्सिनी (हैगफिश) (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);  deani: In honor of American ichthyologist Bashford Dean (1867-1928), American Museum of Natural History, for his work on the embryology of E. stoutii. (See ETYFish).
More on authors: Evermann & Goldsborough.

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

समुद्री बाथीड़िमरसल; गैर प्रवासी; गहराई सीमा 103 - 2743 m (Ref. 31276). Deep-water; 60°N - 27°N, 148°W - 114°W

वितरण देश | ऐफ ऐ ओ क्षेत्र | Ecosystems | संयोग | Point map | भूमिका | Faunafri

Eastern Pacific: southeastern Alaska to central Baja California, Mexico.

Length at first maturity / आकार / वज़न / Age

Maturity: Lm 38.0  range ? - ? cm
Max length : 63.5 cm TL पुल्लिंग / अलिंग; (Ref. 96339)

Short description पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स

पृष्ठीय रीढ़ (सम्पूर्ण) : 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 0; गुदा कांटा: 0; ऐनल सौफट रेज़: 0. No true fins - one dorsal finfold, far back, median, very low, continuous with the caudal; caudal moderately broad, and round with ray-like markings; ventral finfold very low, origin somewhat posterior to last gill aperture, extending to anus (Ref. 6885). Prune colored, preserved specimens black; frequently piebald with light spots; the very edges of caudal and ventral finfolds may be light colored (Ref. 6885).

जीवविज्ञान     शब्द संग्रह (उदाहरणार्थ epibenthic)

Inhabits mud bottoms (Ref. 2850). Minimum depth reported at 103 m (Ref. 80811).

Life cycle and mating behavior Maturities | पुनरुत्पत्ति | Spawnings | Egg(s) | Fecundities | लार्वा

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 ). In one study (Ref. 40710), hermaphroditism is exhibited by only 0.2% of the individuals examined.

Main reference Upload your references | संदर्भ | संयोजक | सहयोगीयो

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)

  Data deficient (DD) ; Date assessed: 12 November 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

मात्स्यिकी: कोई रुचि बग़ैर
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अधिक जानकारी

Trophic ecology
खाद्य पदार्थ
Diet compositions
Food consumptions
Food rations
परभक्षी
Population dynamics
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Max. ages / sizes
Length-weight rel.
Length-length rel.
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Life cycle
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इंटरनेट स्रोत

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Estimates based on models

Preferred temperature (Ref. 123201): 3.2 - 5.5, mean 4.3 °C (based on 54 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00234 (0.00139 - 0.00396), b=2.93 (2.78 - 3.08), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  3.8   ±0.52 se; based on food items.
लौटाव (Ref. 120179):  निम्न, न्यूनतम जनसंख्या दुगनी होने का समय 4.5 - 14 वर्ष। (Fec = 14).
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (45 of 100).