Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Carcharhiniformes (Ground sharks) > Triakidae (Houndsharks) > Galeorhininae
Etymology: Hemitriakis: hemi-, from hemisys (Gr.), half, being a genus that Herre believed was “most closely related” to Triakis. (See ETYFish); japanica: -ica (L.), belonging to: Japan, type locality. (See ETYFish).
More on authors: Müller & Henle.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; demersal; depth range 20 - 345 m (Ref. 86942). Subtropical; 40°N - 19°N, 112°E - 141°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Northwest Pacific: China, Taiwan, Korea, and Japan. Nominal records from Ambon, Indonesia (unconfirmed and based on a specimen close to if not identical to Hemitriakis abdita) and New Caledonia (Ref. 13563).

Length at first maturity / Size / Weight / Age

Maturity: L_m 91.5, range 81 - 102 cm
Max length : 110 cm TL male/unsexed; (Ref. 244); 120.0 cm TL (female); max. reported age: 15 years (Ref. 9031)

Occurs close inshore and offshore down to at least 100 m depth. Presumably feeds on small fishes, cephalopods and crustaceans. Ovoviviparous, with 8 to 22 young in a litter. Size at birth about 20 to 21 cm. Utilized for human consumption.

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Ovoviviparous, embryos feed solely on yolk (Ref. 50449).

Main reference Upload your references | References | Coordinator : Compagno, Leonard J.V. | Collaborators

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)

Endangered (EN) (A2d); Date assessed: 29 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial

FAO - Publication: search | FishSource |

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Trophic ecology
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Ecology
Ecology

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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Preferred temperature (Ref. 123201): 9.7 - 27, mean 20.2 °C (based on 252 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5156 [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).

Trophic level (Ref. 69278): 4.4 ±0.4 se; based on diet studies.

Resilience (Ref. 120179): Very Low, minimum population doubling time more than 14 years (Fec=8).

Fishing Vulnerability (Ref. 59153): High to very high vulnerability (72 of 100).

Price category (Ref. 80766): High.

Hemitriakis japanica (Müller & Henle, 1839)