Somniosus pacificus Bigelow & Schroeder, 1944

Pacific sleeper shark
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Somniosus pacificus   AquaMaps   Data sources: GBIF OBIS
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Image of Somniosus pacificus (Pacific sleeper shark)
Somniosus pacificus
Juvenile picture by Gadig, O.B.F.

Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchi (squali e razze) (sharks and rays) > Squaliformes (Bramble, sleeper and dogfish sharks) > Somniosidae (Sleeper sharks)
Etymology: Somniosus: Latin, somnus = sleep (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range Ecologia

; marino benthopelagico; distribuzione batimetrica 0 - 2205 m (Ref. 119696).   Boreal; 72°N - 23°N, 121°E - 110°W

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

North Pacific and Arctic: Taiwan to Japan and Kuril Islands, Sea of Okhotsk, southeastern Kamchatka, Commander and Aleutian Islands, and southern Baja California to Gulf of Alaska, Bering Sea and Chukchi Sea.

Size / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 440 cm TL maschio/sesso non determinato; (Ref. 247); 430.0 cm TL (female)

Short description Morfologia | Morfometria

Spine dorsali (totale): 0; Spine anali 0; Raggi anali molli: 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).

Biologia     Glossario (es. epibenthic)

Demersal and mesobenthopelagic (Ref. 119696); found on continental shelves and slopes (Ref. 247). At high latitudes, occasionally 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), reported to about 2,205 m in the Hawaiian Is. as recorded by camera arrays (Ref. 119696). 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 Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

Probably ovoviviparous (Ref. 247). Size at birth 42 cm or less (Ref. 26346). Distinct pairing with embrace (Ref. 205).

Main reference Upload your references | Bibliografia | Coordinatore | Collaboratori

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. 120744)

  Data deficient (DD) ; Date assessed: 01 December 2008

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless (Ref. 6871)





Human uses

Pesca: di nessun interesse
FAO(pesca: production; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us

Informazioni ulteriori

Stati
Aree FAO
Ecosystems
Presenze
Introduzioni
Stocks
Ecologia
Dieta
Prede
Consumo di cibo
Razione
Nomi Comuni
Sinonimi
Metabolismo
Predatori
Ecotossicologia
Riproduzione
Maturità
Deposizione
Spawning aggregation
Fecundity
Uova
Egg development
Age/Size
Accrescimento
Length-weight
Length-length
Length-frequencies
Morfometria
Morfologia
Larve
Dinamica popolazioni larvali
Reclutamento
Abbondanza
Bibliografia
Acquacoltura
Profilo di acquacoltura
Varietà
Genetica
Frequenze alleliche
Ereditarietà
Malattie
Elaborazione
Mass conversion
Collaboratori
Immagini
Stamps, Coins Misc.
Suoni
Ciguatera
Velocità
Modalità di nuoto
Area branchiale
Otoliths
Cervelli
Vista

Strumenti

Special reports

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Fonti Internet

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Database Nazionali | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia(Go, ricerca) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 0.5 - 4.5, mean 2.3 (based on 400 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5313   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00356 - 0.01226), b=3.08 (2.91 - 3.25), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic Level (Ref. 69278):  4.4   ±0.4 se; Based on diet studies.
Resilienza (Ref. 69278):  Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec=300; assuming tm<=10).
Vulnerability (Ref. 59153):  Very high vulnerability (89 of 100) .