Élasmobranches (requins et raies) (sharks and rays)
(Bramble, sleeper and dogfish sharks) > Dalatiidae
Etymology: Dalatias: Greek, dalos, ou = torch, burning piece of wood (Ref. 45335). More on author: Bonnaterre.
Environment: milieu / climate zone / depth range / distribution range
; marin bathydémersal; profondeur 37 - 1800 m (Ref. 247), usually 300 - 600 m (Ref. 247). Deep-water; 72°N - 56°S, 98°W - 153°W
Western Atlantic: Georges Bank and northern Gulf of Mexico. Eastern Atlantic: Iceland (Ref. 12462), Scotland, and Irish Atlantic slope to Morocco, western Mediterranean, Madeira to Cameroon. Western Indian Ocean: Mozambique and South Africa. Western Pacific: Japan, Australia, and New Zealand. Central Pacific: Hawaii.
Length at first maturity / Taille / Poids / Âge
Maturity: Lm ?, range 117 - 159 cm
Max length : 182 cm TL mâle / non sexé; (Ref. 10717)
Épines dorsales (Total): 0; Rayons mous dorsaux (Total): 0; Épines anales 0; Rayons mous anaux: 0. Moderately sized, short- and blunt-snouted shark with two almost equal-sized dorsal fins; papillose thick lips; small slender-cusped upper teeth and very large lower teeth with erect triangular serrated cusps and distal blades; first dorsal fin on back with its origin behind the pectoral rear tips and its base closer to the pectoral base than the pelvic fins; and caudal fin with the ventral lobe not expanded (Ref. 247). Dark grey-brown to black; trailing edges of fins translucent (Ref. 26346).
Found on outer continental and insular shelves and slopes (Ref. 247). Mainly found on or near the bottom but readily occurs well off the substrate (Ref. 247, 58302). Often pelagic (Ref. 58302). Found singly or in small schools (Ref. 6871). Feeds mainly on deepwater bony fish, but also skates, other sharks, cephalopods and crustaceans (Ref. 5578). Ovoviviparous (Ref. 205), with 10-20 young born at 30-42 cm (Ref. 26346). Used for its squalene liver oil, leather and meat, as well as for fishmeal (Ref. 6871).
Ovoviviparous (Ref. 247). 10-20 young born at 30-42 cm (Ref. 26346); 10-16 young born at 30 cm TL (Ref.58048). 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 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
Statut dans la liste rouge de l'IUCN (Ref. 119314)
CITES (Ref. 115941)
Menace pour l'homme
Utilisations par l'homme
Pêcheries: intérêt commercial mineur
RéférencesAquacultureProfil d'aquacultureSouchesGénétiqueFréquences alléliquesHéritabilitéPathologiesTraitementMass conversion
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Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 2.5 - 14.3, mean 5.3 (based on 3093 cells).
Phylogenetic diversity index (Ref. 82805
= 1.0020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00217 - 0.01155), b=3.12 (2.91 - 3.33), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Niveau trophique (Ref. 69278
): 4.2 ±0.4 se; Based on diet studies.
Résilience (Ref. 69278
): Faible, temps minimum de doublement de population : 4,5 à 14 années (Fec=10-20).
Prior r = 0.27, 95% CL = 0.15 - 0.48, Based on 1 stock assessment.
Vulnérabilité (Ref. 59153
): High to very high vulnerability (65 of 100) .