Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Pentanchidae (Deepwater catsharks)
Etymology: Apristurus: a-, Latin privative, i.e., without; pristis, from pristes (Gr.), sawyer (but here meaning saw); oura (Gr.), tail, referring to absence of saw-toothed crest of enlarged dermal denticles along upper edge of caudal fin as found in the closely related Pristiurus (=Galeus) (See ETYFish); japonicus: -icus (L.), belonging to: Japan, known only from the northwest Pacific off Chiba Prefecture, Honshu, Japan (See ETYFish).
Environment: milieu / climate zone / εύρος βάθους / distribution range
Οικολογία
Θαλασσινό(ά) βαθύβιο(ς). Deep-water; 36°N - 34°N
Northwest Pacific: off Chiba Prefecture, Honshu, Japan. Collected from the East China Sea (Ref. 559).
Μέγεθος / Βάρος / Age
Γεννητική Ωρίμανση: Lm ? range ? - ? cm
Max length : 71.0 cm TL αρσενικό/απροσδιόριστο; (Ref. 244); 63.0 cm TL (female)
Biology little-known. Oviparous. Utilized for oil, human consumption and fishmeal or fish cakes.
Life cycle and mating behavior
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Oviparous, paired eggs are laid. 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 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (Αναφ.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00175 - 0.00721), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Αναφ.
69278): 4.0 ±0.6 se; based on size and trophs of closest relatives
Ελαστικότητα (Αναφ.
120179): Χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού 4,5 - 14 έτη (Fec assumed to be <10).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (48 of 100).
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