Myxini (mixinas) (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); polytrema: poly- (Gr.), many; trema (Gr.), hole, referring to 16 gill apertures per side. (See ETYFish).
More on author: Girard.
Environment: milieu / climate zone / depth range / distribution range
Ecologia
marinhas demersal; não migratória; intervalo de profundidade 10 - 350 m (Ref. 31276). Deep-water; 30°S - 42°S
Southeast Pacific: Chile (from Coquimbo to Puerto Montt, Ref. 34263).
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 93.0 cm TL macho/indeterminado; (Ref. 31276)
TBK: demerspelag.
Life cycle and mating behavior
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)
Categoria na Lista Vermelha da IUCN (Ref. 130435)
Ameaça para o homem
Harmless
Utilização humana
Pescarias: sem interesse
Ferramentas
Relatórios especiais
Descarregue XML
Fontes da internet
Estimates based on models
Preferred temperature (Ref.
123201): 10.5 - 11.8, mean 11.1 °C (based on 8 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00214 - 0.00706), b=2.93 (2.76 - 3.10), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Nível Trófico (Ref.
69278): 4.4 ±0.7 se; based on size and trophs of closest relatives
Generation time: 8.9 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Resiliência (Ref.
120179): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): High vulnerability (62 of 100).
Nutrients (Ref.
124155): Calcium = 10.4 [2.7, 33.2] mg/100g; Iron = 0.333 [0.119, 0.906] mg/100g; Protein = 2.72 [0.00, 6.54] %; Omega3 = 0.259 [0.101, 0.676] g/100g; Selenium = 13.2 [3.9, 44.3] μg/100g; VitaminA = 9.6 [2.0, 44.9] μg/100g; Zinc = 0.307 [0.153, 0.589] mg/100g (wet weight);
