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Elasmobranchii (Haie und Rochen) (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); complicofasciata: complico (L.), complicated; fasciata (L.), striped, referring to complex body color pattern of young specimens (See ETYFish).

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

seewasser benthopelagisch. Temperate

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Northwest Pacific: Ryukyu Is. (Japan) and Taiwan.

Size / Gewicht / Alter

Maturity: L_m ? range ? - 80.5 cm
Max length : 81.0 cm TL Männchen/unbestimmt; (Ref. 55581); 88.0 cm TL (female)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

This species is distinguished by the following characters: monospondylous vertebrae 46-52; precaudal total vertebrae 124-131; posterior nasal flap developed; first dorsal fin origin anterior to free rear tips of pectoral fin; snout length short with snout tip to oral length < 1.8 times internarial width; embryos and juveniles with dark complicated lines and rings; no accessory cartilage at symphysial part of upper jaw (Ref. 55581).

Claspers of most males are almost fully elongate and calcified at about 76 cm TL; while females are mature and pregnant at about 76 cm TL. Embryos less than 22 cm TL with only external yolk, most that are more than 22 cm TL with substantial internal yolk. Litter size from 5-8 with 2-4 embryos per uterus. Five pregnant specimens contained a total of 29 embryos (9 females and 20 males) and each embryo were covered separately by embryonic membrane (Ref. 55581).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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Takahashi, M. and K. Nakaya, 2004. Hemitriakis complicofasciata, a new whitefin topshark (Carcharhiniformes; Triakidae) from Japan. Ichth. Research 51(3):248-255. (Ref. 55581)

IUCN Rote Liste Status (Ref. 130435: Version 2024-2)

gefährdet, siehe IUCN Red List (VU) (A2d); Date assessed: 30 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00427 (0.00180 - 0.01010), b=3.04 (2.84 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.2 ±0.5 se; based on size and trophs of closest relatives

Widerstandsfähigkeit (Ref. 120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (Preliminary low fecundity).

Fishing Vulnerability (Ref. 59153): High vulnerability (55 of 100).

Hemitriakis complicofasciata Takahashi & Nakaya, 2004