分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (sharks and rays) >
Carcharhiniformes (Ground sharks)
真鯊目 (Ground sharks) >
Sphyrnidae (Hammerhead, bonnethead, or scoophead sharks)
丫髻鮫科 (Hammerhead, bonnethead, or scoophead sharks)
Etymology: Sphyrna: Probable misspelling of sphyra (Gr.), hammer, referring to their hammer-shaped heads. (See ETYFish); tudes: Latin for hammer, referring to its hammer-shaped head. (See ETYFish).
More on author: Valenciennes.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 底中水層性, usually ? - 12 m (Ref. 244). 亞熱帶的; 46°N - 57°S, 73°W - 37°E (Ref. 244)
Southwest Atlantic: Venezuela to Argentina (Ref. 58839). Also Mediterranean Sea and Eastern Pacific (Ref. 7251).
西南大西洋: 委內瑞拉到阿根廷.(參考文獻 58839) 也地中海與東太平洋.(參考文獻 7251)
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 134 cm TL 雄魚/尚未辨別雌雄; (Ref. 244); 148.0 cm TL (female)
A little-known inshore shark of the continental shelf, found down to at least 12 m depth. Feeds on small bony fishes, including sea catfish and grunts, but also newborn scalloped hammerheads, swimming crabs, squids, and shrimp. Viviparous with a yolk-sac placenta; number of young probably 6 to 9 per litter (Ref. 244).
被發現的大陸棚的所知極少近海鯊魚向下至至少 12 公尺深。 吃小的硬骨魚類,包括海洋鯰魚與咕嚕咕嚕聲, 也新生小魚有荷葉邊的 hammerheads ，游泳螃蟹，烏賊與蝦了。 胎生的具有一個卵黃囊胎盤; 幼魚數目可能 6 到 9 每胎.(參考文獻 244)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
Viviparous, with yolk-sac plazenta; number of young probably 6 - 9 per litter. Size at birth about 30 cm.西南大西洋: 委內瑞拉到阿根廷.(參考文獻 58839) 也地中海與東太平洋.(參考文獻 7251)
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
IUCN 瀕危狀態 (Ref. 130435)
極危 (CR) (A2bd); Date assessed: 01 July 2019
人類使用
漁業: 自給性漁業
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Estimates based on models
Preferred temperature (Ref.
123201): 17.6 - 27.8, mean 21.1 °C (based on 613 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5029 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00347 (0.00157 - 0.00767), b=3.12 (2.93 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.6 ±0.4 se; based on diet studies.
回復力 (Ref.
120179): 非常低的, 最小族群倍增時間超過14 年 (Fec=6).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (89 of 100).
