Elasmobranquios (tiburones y rayas) (sharks and rays) >
Squaliformes (Bramble, sleeper and dogfish sharks) >
Somniosidae (Sleeper sharks)
Etymology: Somniosus: Latin, somnus = sleep (Ref. 45335).
Medioambiente / Clima / Gama
Ecología
; marino bentopelágico; rango de profundidad 0 - 2000 m (Ref. 26346). Temperate, preferred 18°C (Ref. 107945); 70°N - 47°S
North Pacific.
Tamaño / Peso / Age
Maturity: Lm ?  range ? - ? cm
Max length : 440 cm TL macho / no sexado; (Ref. 247); 430.0 cm TL (female)
Espinas dorsales (total): 0; Espinas anales 0; Radios blandos anales: 0. Diagnosis: Somniosus pacificus differs from S. antarcticus by the following characters: interdorsal space about 70% of prebranchial length (vs. 80%); height of first dorsal fin about 3.7% of precaudal length (PCL) (vs. 3.0%); height of second dorsal fin about 3.4% of PCL (vs. 2.9%); number of turns in spiral valve 32-37 (mode 33) (vs. 36-41, mode 39); precaudal vertebrae 28-30 (mode 29) (vs. 30-31, mode 30) (Ref. 50224).
Found on continental shelves and slopes (Ref. 247). At high latitudes, it occurs in littoral and even intertidal areas; in lower latitudes it may never come to the surface and ranges down to at least 2,000 m (Ref. 247). Feeds on bottom animals such as fishes, octopi, squids, crabs and tritons; also harbor seals and carrion (Ref. 247). Ovoviviparous (Ref. 205), with 300 pups in a litter (Ref. 247), length at birth about 42 cm or less (Ref. 26346). The flesh contains a type of toxin which, when eaten, produces symptoms of drunkenness (Ref. 583). Possibly reaches lengths greater than 700 cm (Ref. 247).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Probably ovoviviparous (Ref. 247). Size at birth 42 cm or less (Ref. 26346). Distinct pairing with embrace (Ref. 205).
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)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 94142)
Not Evaluated
Human uses
Pesquerías: sin interés
Más información
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