Spain country information

Common names: Little sleeper shark, Tauró boreal, Tiburón boreal
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Found in Galicia (Ref. 86578). Also Ref. 113585.
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/sp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Compagno, L.J.V., 1984
National Database: ICTIMED

Classification / Names

Elasmobranchii (sharks and rays) > Squaliformes (Bramble, sleeper and dogfish sharks) > Somniosidae (Sleeper sharks)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

قِرش راقِد صغير, 小鳍睡鲨, Laimargue de la Méditerranée, ... more

Main reference

Yano, K., J.D. Stevens and L.J.V. Compagno. 2004. (Ref. 50224)
References | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 143 cm TL male/unsexed; (Ref. 26346); common length : 100.0 cm TL male/unsexed; (Ref. )

Length at first maturity
L_m ?, range 82 - 134 cm

Environment

Marine; bathydemersal; depth range 200 - 1330 m (Ref. 104125)

Climate / Range

Deep-water, preferred 27°C (Ref. 107945); 47°N - 43°S

Distribution

Northeast Atlantic: Madeira, France, and western Mediterranean.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 0. Diagnosis: Somniosus rostratus is distinguished from S. longus in having overall length of second dorsal shorter than first dorsal fin 76-88% (vs. almost equal 91-100%); horizontal diameter of eye less than 37% (mean 33%) of length from snout tip to eye (vs. >37, mean 46%); number of tooth rows in upper jaw 53 (vs. 56-57); and spiral valve counts 23 (vs. 26-27) (Ref. 50224).

A rare species (Ref. 26346) found on outer continental shelves and upper slopes (Ref. 247). Probably feeds on deepwater bottom fishes and invertebrates (Ref. 247). Ovoviviparous (Ref. 205), length at birth 21-28 cm TL (Ref. 26346). Utilized as fishmeal and possibly as food fish (Ref. 247).

IUCN Red List Status (Ref. 115185)

Data deficient (DD)

Threat to humans

Harmless

Human uses

Fisheries: minor commercial

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance

References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion

Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

Download XML

Summary page | Point data | Common names | Photos

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5313 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.2 ±0.4 se; Based on diet studies.

Resilience (Ref. 69278)
Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100)

Vulnerability (Ref. 59153)
Very high vulnerability (76 of 100)

Price category (Ref. 80766)
Unknown

Somniosus rostratus (Risso, 1827)