Elasmobranchi (squali e razze) (sharks and rays) >
Squatiniformes (Angel sharks) >
Squatinidae (Angel sharks)
Etymology: Squatina: Latin for skate, which angel sharks superficially resemble, presumably tautonymous with Squalus squatina Linnaeus 1758 (no species mentioned) (See ETYFish); japonica: -ica (L.), belonging to: Japan, referring to Nagasaki, type locality (See ETYFish).
More on author: Bleeker.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
marino demersale. Subtropical; 41°N - 19°N, 111°E - 139°E (Ref. 54906)
Northwest Pacific: Japan, Yellow Sea, Korea, and northern China.
Dimensione / Peso / Età
Maturità: Lm ? range ? - ? cm
Max length : 200 cm TL maschio/sesso non determinato; (Ref. 247)
Spine dorsali (totale) : 0; Spine anali: 0. Japanese angelshark Squatina japonica has broad pectoral fins with rounded free rear tips, posterior margin nearly straight, inner margin strongly convex; nasal barbels simple and spatulate. Anterior nasal flaps smooth to weakly fringed; dermal folds on sides of head without lobes. Rear tip of inner margin of pelvic fins considerably anterior to origin of first dorsal; very short hypocercal tail. Rows of moderately large spines on midline of back and tail from head to dorsal fins and between fin bases, and on snout and above eyes. Body color blackish brown with small dark and pale spots; no ocelli (eye-like spot) (Ref. 247, 31369, 12951).
Body shape (shape guide): other.
A little-known angelshark, found on or near the bottom (Ref. 247). Lives in sandy ground. A carnivore that eats benthic animals (Ref. 9137). Ovoviviparous (Ref. 50449). Utilized for human consumption and for preparation of shagreen (Ref. 247).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Ovoviviparous, embryos feed solely on yolk (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 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Traumatogenic
Usi umani
Pesca: scarso interesse commerciale
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Temperatura preferita (Fonte Biblio.
123201): 5.7 - 20.7, mean 17.3 °C (based on 123 cells).
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00287 - 0.01523), b=3.07 (2.88 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Livello trofico (Fonte Biblio.
69278): 3.5 ±0.37 se; based on food items.
Resilienza (Fonte Biblio.
120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec assumed to be <100).
Vulnerabilità della pesca (Ref.
59153): Very high vulnerability (90 of 100).
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