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Carcharhiniformes (Ground sharks) >
Triakidae (Houndsharks) > Galeorhininae
Etymology: Hypogaleus: hypo (Gr.), less than, under or beneath, allusion not explained, perhaps alluding to its original position as a subgenus of Galeus. (See ETYFish); hyugaensis: -ensis, Latin suffix denoting place: Hyuga Nada, Japan, type locality. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
Biển gần đáy; Mức độ sâu 40 - 230 m (Ref. 244). Deep-water; 37°N - 40°S
Indo-West Pacific: East Africa and the Persian Gulf to Taiwan and Japan. Reported from Australia (Ref. 6871).
Length at first maturity / Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?, range 95 - ? cm
Max length : 127 cm TL con đực/không giới tính; (Ref. 244); 122.0 cm TL (female)
Các tia vây lưng cứng (tổng cộng) : 0; Tia cứng vây hậu môn: 0. Dull grey dorsally, paler below; front part of snout slightly dusky (Ref. 5485).
Inhabits continental shelves (Ref. 244). Feeds on bony fishes and cephalopods (Ref. 6871). Viviparous (Ref. 50449). Utilized as a food fish (Ref. 244).
Viviparous (with a yolk-sac placenta), with 10 or 11 young in a litter (Ref. 244). Size of full-term fetuses about 33 to 35 cm (Ref. 244). Gestation period is estimated at 15 months (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 Red List Status (Ref. 130435)
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201): 19.9 - 27.7, mean 23.8 °C (based on 194 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00427 (0.00183 - 0.00992), b=3.04 (2.83 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 4.2 ±0.7 se; based on diet studies.
Thích nghi nhanh (Ref.
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Fec=10; gestation about 15 months).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (76 of 100).