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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.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (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.

環境 / 氣候 / 範圍 生態學

; 海洋 深海底的; 深度上下限 0 - 600 m (Ref. 5578), usually 90 - 600 m (Ref. 6874).    , preferred ?; 49°N - 35°S, 99°W - 161°E (Ref. 55216)

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | 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).

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm ?, range 142 - 178 cm
Max length : 180 cm TL 雄魚/尚未辨別雌雄; (Ref. 247); common length : 120 cm TL 雄魚/尚未辨別雌雄; (Ref. 5217)

簡短描述 型態特徵 | 形態測量圖

脊椎骨: 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).

生物學特性     字彙 (例如 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).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

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

主要參考資料 Upload your references | 參考文獻 | 合作者 : Compagno, Leonard J.V. | 合作者

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)

IUCN 瀕危狀態 (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

對人類具威脅

  (Ref. 247)




人類使用

漁業: 自給性漁業
FAO(Publication : search) | FisheriesWiki | 周邊海洋

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