分類 / 名前
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) >
Hemigaleidae (Weasel sharks)
Etymology: Chaenogaleus: chaeno-, from chaino (Gr.), gape, referring to “rictus as long as wide”; galeos, a small shark or dogfish per Aristotle (sometimes translated as weasel, hence the name Weasel Sharks, possibly referring to the pointed snouts, swift movements and/or rapacious feeding behavior of smaller predatory sharks1), but in this case probably an allusion to Hemigaleus, original genus of C. macrostoma (See ETYFish); macrostoma: macro-, from makros (Gr.), large or long; stoma (Gr.), mouth, referring to long, greatly arched mouth compared with Hemigaleus microstoma, its presumed congener at the time (See ETYFish).
More on author: Bleeker.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
海 底生の; 深さの範囲 ? - 59 m (Ref. 244). Tropical; 30°N - 10°S
Indo-West Pacific: Persian Gulf (Ref. 13567), Pakistan, India, Sri Lanka, Singapore, Thailand, Viet Nam, China, Taiwan, Java and Sulawesi in Indonesia. This name has been used indiscriminately for the three species of hemigaleids in Indo-Pakistani waters other than Hemipristis elongatus.
初回成熟時の長さ / サイズ / 重さ / 年齢
成熟: Lm 82.5, range 68 - 97 cm
Max length : 100.0 cm TL オス/雌雄の選別がない; (Ref. 244)
背面の脊椎 (合計) : 0; 肛門の骨: 0. Bronzy-grey above, white below when fresh, fading to greyish or greyish brown in preservation, dorsal fins often with dusky or black tips (Ref. 13567).
Body shape (shape guide): elongated.
A common inshore and offshore shark found on the continental and insular shelves (Ref. 13567). Probably feeds on small fishes, cephalopods, and crustaceans (Ref. 244). Viviparous (Ref. 50449). Caught irregularly by inshore gillnet fisheries and occasionally by small-scale longlining (Ref.58048). Probably taken by artisanal fisheries wherever it occurs (Ref. 13567). Utilized fresh for human consumption and by-products processed into fishmeal (Ref. 244).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Viviparous (with a yolk-sac placenta), with 4 young in a litter (Ref. 244). Size at birth at least 20 cm (Ref. 244). Distinct pairing with embrace (Ref. 205).
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のレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
脆弱 (VU) (A2d); Date assessed: 12 May 2020
人間の用途
水産業: 少数商業の
用具
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インターネットの情報源
モデルに基づく推定値
好ましい温度 (参照
123201): 25 - 29.3, mean 28.4 °C (based on 1082 cells).
系統多様性指数 (参照
82804): PD
50 = 1.0039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00216 - 0.00423), b=3.04 (2.95 - 3.13), in cm total length, based on LWR estimates for this species (Ref.
93245).
栄養段階 (参照
69278): 4.2 ±0.57 se; based on food items.
回復力 (参照
120179): 非常に低い, １４年以上の倍増期間の最小個体群 (Fec=4).
漁業の脆弱性 (Ref.
59153): High vulnerability (60 of 100).
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