Élasmobranches (requins et raies) (sharks and rays) >
Squaliformes (Sleeper and dogfish sharks) >
Somniosidae (Sleeper sharks)
Etymology: Somniosus: Latin for sleepy, reflecting Lesueur’s surmise that these sharks are slow or sluggish because of their relatively small fins (hence the name sleeper sharks). (See ETYFish); antarcticus: -icus (L.), belonging to: the Antarctic (Whitley presumed this to be the first shark recorded from there). (See ETYFish).
More on author: Whitley.
Environment: milieu / climate zone / depth range / distribution range
Écologie
marin benthopélagique; profondeur 485 - 1150 m (Ref. 50224). Deep-water
South Indo-Pacific and South Atlantic.
Taille / Poids / Âge
Maturity: Lm ? range ? - ? cm
Max length : 438 cm TL mâle / non sexé; (Ref. 50224); 430.0 cm TL (female)
Vertèbres: 36 - 38. Somniosus antarcticus differs from S. pacificus by the following characters: interdorsal space about 80% of prebranchial length (vs. 70%); height of first dorsal fin about 3.0% of precaudal length (PCL) (vs. 3.7%); height of second dorsal fin about 2.9% of PCL (vs. 3.4%); number of turns in spiral valve 36-41 (mode 39) (vs. 32-37, mode 33); precaudal vertebrae 30-31 (mode 30) (vs. 28-30, mode 29) (Ref. 50224).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larves
Yano, K., J.D. Stevens and L.J.V. Compagno, 2004. A review of the systematics of the sleeper shark genus Somniosus with redescriptions of Somniosus (Somniosus) antarcticus and Somniosus (Rhinoscymnus) longus (Squaliformes: Somniosidae). Ichthyol. Res. 51:360-373. (Ref. 50224)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
Articles particuliers
Télécharger en XML
Sources Internet
Estimates based on models
Preferred temperature (Ref.
123201): 1.7 - 5.8, mean 4 °C (based on 113 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5313 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00168 - 0.00901), b=3.13 (2.94 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 4.5 ±0.58 se; based on food items.
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
