Longnose spurdog (Squalus blainville) fish species and Longnose spurdog information

Scientific Name
Squalus blainville

Common Name
Longnose spurdog

Biology
Found on the continental shelves and upper slopes. Depth range from 16-440 m (Ref. 0247), and from 300-780m in the eastern Ionian Sea (Ref. 56504). Forms schools. Off West Africa, water temperature and salinity where this species is often found ranges from 11-18?C and 36 ppt. (at 16 to 255 m depth), respectively. Feeds on bony fishes, like denticids, mackerel and percichthyids, as well as crabs, lobsters, and octopi. Ovoviviparous, with 3 to 4 young per litter. Utilized fresh, dried salted and smoked for human consumption.

Classification

Classified By

Risso, 1827

Class

Sharks and Rays (Elasmobranchii)

Order

Bramble, Sleeper and Dogfish sharks (Squaliformes)

Family

Dogfish sharks (Squalidae)

Distribution

Region

Eastern Atlantic

Distribution

Eastern Atlantic: Bay of Biscay to Mediterranean, Morocco, Senegal to Namibia (these records may include other species in addition to Squalus blainvillei). Although reported from the Canary Islands (e.g. Ref. 247), it is most likely based on misidentifications of Squalus megalops (Ref. 6808). Western Pacific: southern Japan and Taiwan. Nominal records of Squalus blainvillei or Squalus fernandinus from the western Atlantic (North Carolina, USA to northern Gulf of Mexico; Argentina), Indian Ocean (South Africa, Mozambique, Madagascar, Tanzania and India) and the Pacific (Australia, New Zealand, New Caledonia, Hawaii and northern Chile), as well as some records from the northwest Pacific and eastern Atlantic are based at least in part on Squalus mitsukurii and possibly other species. Whether Squalus blainvillei itself is as wide-ranging as reported for blainvillei-group dogfishes (including Squalus mitsukuri

Range

50°N - 29°S, 17°W - 43°E

Environment

Climate

Subtropical

Water Temperature From

11 °C

Water Temperature To

18 °C

Depth From - meters

16 m

Depth To - meters

780 m

Zone

demersal

Environment

Marine; brackish; demersal; depth range 16 - 780 m (Ref. 56504)

Trophic Level

3.97 s.e. 0.57 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

True

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

100.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial

Vulnerability

High to very high vulnerability (70 of 100)

Resilience

Very Low, minimum population doubling time more than 14 years (K=0.10-0.14; Fec=3)

Threat To Humans

Harmless

IUCN Red List Status

Data deficient (DD)

Longnose spurdog (Squalus blainville) fish species and information / pictures of Longnose spurdog - Squalus blainville

Longnose spurdog (Squalus blainville) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population