Knifetooth dogfish (Scymnodon ringens) fish species and Knifetooth dogfish information

Scientific Name
Scymnodon ringens

Common Name
Knifetooth dogfish

Biology
Anal spines: 0; Anal soft rays: 0. Black in color; small dorsal fin spines; short snout; small lanceolate teeth without cusplets in upper jaw and huge high, knife-cusped cutting teeth in lower jaw; mouth very wide and broadly arched; caudal fin with weak subterminal notch and no lower lobe (Ref. 247).

Classification

Classified By

Barbosa du Bocage & de Brito Capello, 1864

Class

Sharks and Rays (Elasmobranchii)

Order

Bramble, Sleeper and Dogfish sharks (Squaliformes)

Family

Sleeper sharks (Somniosidae)

Distribution

Region

Eastern Atlantic

Distribution

Eastern Atlantic: along the slope from Scotland to Spain, Portugal, Senegal. Southwest Pacific: New Zealand (Ref. 26346).

Range

58°N - 15°N

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

200 m

Depth To - meters

1600 m

Zone

bathyalpelagic

Environment

Marine; bathypelagic; depth range 200 - 1600 m (Ref. 247), usually 550 - 1450 m (Ref. 10717)

Trophic Level

3.88 s.e. 0.61 Based on diet studies.

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

110 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.7500 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 (58 of 100)

Resilience

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

Threat To Humans

Traumatogenic

IUCN Red List Status

Data deficient (DD)

Knifetooth dogfish (Scymnodon ringens) fish species and information / pictures of Knifetooth dogfish - Scymnodon ringens

Knifetooth dogfish (Scymnodon ringens) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population