Japanese spurdog (Squalus japonicus) fish species and information / pictures of Japanese spurdog - Squalus japonicus

Japanese spurdog (Squalus japonicus) fish species information

Scientific Name
Squalus japonicus

Common Name
Japanese spurdog

Biology
Found on the outer continental and insular shelves and uppermost slopes, presumably on or near sandy-mud bottom (Ref. 31367, 11230). Ovoviviparous (Ref. 205).

Classification

Classified By

Ishikawa, 1908

Class

Sharks and Rays (Elasmobranchii)

Order

Bramble, Sleeper and Dogfish sharks (Squaliformes)

Family

Dogfish sharks (Squalidae)

Distribution

Region

Western Pacific

Distribution

Western Pacific: southeastern Japan and East China Sea, including the Republic of Korea, the Philippines, and the Arafura Sea (Ref. 9819).

Range

41°N - 5°N

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

150 m

Depth To - meters

300 m

Zone

bathydemersal

Environment

Marine; bathydemersal; depth range 150 - 300 m (Ref. 31367)

Trophic Level

4.36 s.e. 0.65 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

91.0 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: minor commercial

Vulnerability

High vulnerability (63 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be

Threat To Humans

Harmless

IUCN Red List Status

Data deficient (DD)