Japan country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: scarce (very unlikely) | Ref: Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known only from the type locality, Hyalonema Ground, Misaki at about 630 meters (TUM 1448, holotype of Myxine paucidens, 18.5 cm TL), and from nearby Sagami-nada Sea (=Sagami Gulf) at about 1000 meters on the east coast of Honshu Island (Ref. 559, 51420).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ja.html
National Fisheries Authority: http://www.maff.go.jp/eindex.html
Occurrences: Occurrences Point map
Main Ref: Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984
National Database:

Common names from other countries

Vähehammas-pihklane, 少牙盲鳗, 少牙盲鰻, ... more

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

Myxini (Kieferlose) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Myxininae
Etymology: Myxine: Ancient Greek word for a slimy fish: myxa, slime; -inus, one who, referring to copious amounts of slime produced by M. glutinosa. (See ETYFish); paucidens: paucus (L.) few; dens (L.) tooth, referring to 13 total teeth compared to 15-24 teeth in similar species. (See ETYFish).
More on author: Regan.

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

seewasser bathydemersal; standorttreu; tiefenbereich 630 - 1000 m (Ref. 51420). Deep-water

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Northwest Pacific: known only from the Sagaminada Sea, Japan.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 30.5 cm TL Männchen/unbestimmt; (Ref. 31276)

Kurzbeschreibung Morphologie | Morphometrie

Diagnosis: Six pairs of gill pouches; the last gill aperture not confluent with to pharyngocutaneous duct; ventral finfold well developed; fused cusps 2/2, anterior (outer) unicusps 4-4, posterior (inner) unicusps 5-5, total cusps 26; total slime pores 92=93 (Ref. 51420).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | 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 ).

Hauptreferenz Upload your references | Referenzen | Koordinator | Partner

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 Rote Liste Status (Ref. 130435)

stark gefährdet (EN) (B1ab(ii)); Date assessed: 11 November 2009

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00115 (0.00045 - 0.00296), b=3.03 (2.80 - 3.26), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.6 se; based on size and trophs of closest relatives

Widerstandsfähigkeit (Ref. 120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Low vulnerability (21 of 100).

Myxine paucidens Regan, 1913