Myxini (peixes-bruxa) (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); sheni: In honor of Shih (or Shieh)- Chieh Shen, National Taiwan University, for his contributions to the knowledge of Taiwanese fishes. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
marinhas batidemersal; não migratória; intervalo de profundidade 200 - 800 m (Ref. 31276). Deep-water
Northwest Pacific: Taiwan.
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 43.0 cm TL macho/indeterminado; (Ref. 31276)
6 pairs gill pouches and gill apertures; gill apertures usually closely spaced in a straight line, but never crowded together; fused unicuspid teeth 3/3; dental formula: 11 + 3/3 + 10; no whitish mid-dorsal stripe; eye spots prominent.
Ciclo de vida ou comportamento de acasalamento
Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas
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 na Lista Vermelha da UICN (Ref. 130435)
Ameaça para os humanos
Harmless
Uso pelos humanos
Ferramentas
Relatórios especiais
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Fontes da internet
Estimates based on models
Preferred temperature (Ref.
123201): 9.3 - 16, mean 11.8 °C (based on 34 cells).
Índice de diversidade filogenética (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).
Nível Trófico (Ref.
69278): 4.1 ±0.7 se; based on size and trophs of closest relatives
Resiliência (Ref.
120179): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (33 of 100).
