分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) >
Hexanchiformes (Frill and cow sharks) >
Hexanchidae (Cow sharks)
Etymology: Hexanchus: hex (Gr.), six; anchus, etymology unclear, perhaps anchos (Gr.), choke or throttle, referring to how six gill openings of H. griseus extend down onto the throat (See ETYFish); nakamurai: In honor of Teng’s colleague Hiroshi Nakamura, Fisheries Experiment Station of the Government-General during the Japanese occupation of Taiwan, who illustrated this species as H. griseus in 1936 (See ETYFish).
Eponymy: Dr Hiroshi Nakamura was a Japanese ichthyologist. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋 深海底的; 深度上下限 0 - 700 m (Ref. 125614), usually 90 - 600 m (Ref. 6574). 深水域; 33°N - 36°S, 30°E - 178°W
Indo-West Pacific: patchily distributed in most warm-temperate and tropical seas.
中西大西洋: 墨西哥 (參考文獻 13186) ，巴哈馬外，古巴北部，尼加拉瓜與哥斯大黎加。 東大西洋: 法國到摩洛哥, 包括地中海;(參考文獻 13573) 可能地象牙海岸與奈及利亞。 印度洋: 外海的非洲東部與南部 (參考文獻 13573), 亞達伯拉島 (印度); 西澳大利亞.(參考文獻 6871) 西太平洋: 日本，台灣，菲律賓，新加勒多尼亞與澳洲東部.(參考文獻 13573)
Length at first maturity / 大小 / 重量 / 年龄
Maturity: Lm ?, range 142 - ? cm
Max length : 206 cm TL 雄鱼/尚未辨别雌雄; (Ref. 130455)
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).
一种小的 , 瘦又六条鳃裂的 cowshark, 具有一个狭窄的头部与大的眼。 (参考文献 5578) 吻顿尖的, 身体纺锤型.(参考文献 6871) 背鳍相当小的, 从腹鳍基底的后半段之上变化到的起源在腹鳍嵌入正后方.(参考文献 6871) 比背鳍小的臀鳍.(参考文献 6871) 活体有萤光的绿色眼。 (参考文献 6871) 背部灰褐色的, 腹侧灰白的.(参考文献 6871) 鳍有白色的蔓缘。 (参考文献 6574)
Found on continental and island shelves and slopes, occasionally near surface or inshore from 0 to 700 m depth. Feeds on small to medium-sized bony fishes and occassionally on crustaceans. Viviparous, with 13-26 young in a litter (Ref. 125614). Size at birth measures to about 40-43 cm TL (Ref. 94780). It is taken as bycatch within its range, but is not commercially important (Ref. 125614). Utilized for its fins, meat and liver oil but of little value due to its relatively small size (Ref. 58048).
栖息于大陆棚与岛屿棚与上层斜坡了, 从 90 到 600 公尺深, 通常在底部之上或附近, 可能移动到表面在晚上.(参考文献 247,5578) 可能吃硬骨鱼与甲壳动物。 (参考文献 13573) 卵胎生的 (参考文献 205), 具有 13 幼鱼在一胎.(参考文献 247) 没有危险性对人已知.(参考文献 247)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Viviparous, with number of young 13 in one litter. Length at birth about 43 cm (Ref. 125614). Distinct pairing with embrace (Ref. 205).中西大西洋: 墨西哥 (參考文獻 13186) ，巴哈馬外，古巴北部，尼加拉瓜與哥斯大黎加。 東大西洋: 法國到摩洛哥, 包括地中海;(參考文獻 13573) 可能地象牙海岸與奈及利亞。 印度洋: 外海的非洲東部與南部 (參考文獻 13573), 亞達伯拉島 (印度); 西澳大利亞.(參考文獻 6871) 西太平洋: 日本，台灣，菲律賓，新加勒多尼亞與澳洲東部.(參考文獻 13573)
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)
世界自然保护联盟红皮书 (Ref. 130435: Version 2024-1)
临近濒危 (NT) (A2d); Date assessed: 21 November 2019
人类利用
渔业: 自给性渔业
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Estimates based on models
Preferred temperature (Ref.
123201): 8.1 - 23.9, mean 14.4 °C (based on 1233 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.8281 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00240 (0.00101 - 0.00571), b=3.14 (2.93 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 4.2 ±0.7 se; based on diet studies.
回复力 (Ref.
120179): 非常低的, 最小族群倍增时间超过14 年 (Fec = 13).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
