分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
板鰓亜鋼(サメとエイ類) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Sphyrnidae (Hammerhead, bonnethead, or scoophead sharks)
Etymology: Sphyrna: Probable misspelling of sphyra (Gr.), hammer, referring to their hammer-shaped heads. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
生態学
海 底生の漂泳性. Tropical; 17°N - 5°S, 19°W - 13°E
Eastern Atlantic: Senegal to Congo. Not in Compagno's 1999 checklist (Ref. 35766).
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 300 cm TL オス/雌雄の選別がない; (Ref. 244)
A coastal-pelagic shark. Feeds on fishes, especially bony fishes, and also benthic and epibenthic cephalopods. Viviparous, with 24 to 28 young in a litter. Size at birth about 30 to 32 cm.
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
Viviparous, placental (Ref. 50449).
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)
Human uses
水産業: 食糧水産
用具
特記事項
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インターネットの情報源
Estimates based on models
Preferred temperature (Ref.
123201): 24.4 - 28, mean 26.7 °C (based on 64 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).
栄養段階 (Ref.
69278): 4.5 ±0.54 se; based on food items.
回復力 (Ref.
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (Fec=24).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
