Hexanchus nakamurai, Bigeyed sixgill shark : fisheries

Hexanchus nakamurai Teng, 1962

Bigeyed sixgill shark
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Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Hexanchus nakamurai   AquaMaps   Data sources: GBIF OBIS
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Image of Hexanchus nakamurai (Bigeyed sixgill shark)
Hexanchus nakamurai
Picture by Murch, A.

Classificação / Names Nomes comuns | Sinônimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (tubarões e raias) (sharks and rays) > Hexanchiformes (Frill and cow sharks) > Hexanchidae (Cow sharks)
Etymology: Hexanchus: Greek, exa = six + Gree, agcho, narrow (Ref. 45335);  nakamurai: Named for Dr. Hiroshi Nakamura.

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

; marinhas batidemersal; intervalo de profundidade 0 - 600 m (Ref. 5578), usually 90 - 600 m (Ref. 6874).   Deep-water; 49°N - 35°S, 99°W - 161°E (Ref. 55216)

Distribuição Países | Áreas da FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

Wide-ranging, patchily distributed species, in warm temperate and tropical seas (Ref. 94780). Western Central Atlantic: Mexico (Ref. 13186), off Bahamas, northern Cuba, Nicaragua and Costa Rica. Eastern Atlantic: France to Morocco, including Mediterranean Sea (Ref. 13573); possibly Côte d'Ivoire and Nigeria. Indian Ocean: off eastern and southern Africa (Ref. 13573), Aldabra Island (India); Western Australia (Ref. 6871). Western Pacific: Japan, Taiwan, Philippines, New Caledonia and eastern Australia (Ref. 13573).

Comprimento de primeira maturação / Tamanho / Peso / Idade

Maturity: Lm ?, range 142 - 178 cm
Max length : 180 cm TL macho/indeterminado; (Ref. 247); common length : 120 cm TL macho/indeterminado; (Ref. 5217)

Descrição suscinta Morfologia | Morfometria

Vértebras: 155. This slender-bodied shark is readily distinguished from its larger congener (H. griseus) by having a narrower head, relatively larger eyes, 5 large lower comb-shaped anterolateral teeth, a long slender dorsal-caudal space, with distance from the dorsal origin to the upper caudal origin being at least twice the length of the dorsal fin base; with the upper and lower caudal postventral margins forming a strong arch. In life, Color of dorsum a uniform pale brown without a light line extending along the lateral body trunk, the trailing fin edges are white in some specimens and the ventral surface is lighter (Ref. 94780).

Biologia     Glossário (p.ex. epibenthic)

Found on continental and insular shelves and upper slopes, from 90 to 600 m depth, usually on or near bottom, may move to the surface at night (Ref. 247, 5578). Probably feeds on bony fish and crustaceans (Ref. 13573). Ovoviviparous (Ref. 205), with 13 young in a litter (Ref. 247). Size at birth measures to about 40-43 cm TL (Ref. 94780). Not dangerous to people as far as is known (Ref. 247). Utilized for its fins, meat and liver oil but of little value due to its relatively small size (Ref.58048).

Ciclo de vida ou comportamento de acasalamento Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

Ovoviviparous, with number of young 13 in one litter. Length at birth about 43 cm (Ref. 247). Distinct pairing with embrace (Ref. 205).

Referência principal Upload your references | Referências | Coordenador : Compagno, Leonard J.V. | Colaboradores

Ebert, D.A., W.T. White and H.-H. Ho, 2013. Redescription of Hexanchus nakamurai Teng 1962, (Chondrichthyes: Hexanchiformes: Hexanchidae), with designation of a neotype. Zootaxa 3752(1):020-034. (Ref. 94780)

Status na Lista Vermelha da UICN (Ref. 120744)

  Dados insuficientes (DD) ; Date assessed: 01 December 2008

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para os humanos

  Harmless (Ref. 247)





Uso pelos humanos

Pescarias: pesca de subsistência
FAO(Publication : search) | FishSource |

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Nomes comuns
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Estimates based on models

Preferred temperature (Ref. 115969): 8.1 - 23.9, mean 14.4 (based on 1233 cells).
Índice de diversidade filogenética (Ref. 82805):  PD50 = 0.8281   [Uniqueness, from 0.5 = low to 2.0 = high].
Nível Trófico (Ref. 69278):  4.2   ±0.7 se; Based on diet studies.
Resiliência (Ref. 120179):  Muito baixo(a), tempo mínimo de duplicação da população maior que 14 anos (Fec = 13).
Vulnerabilidade (Ref. 59153):  Very high vulnerability (81 of 100) .
Categoria de preço (Ref. 80766):   Unknown.