Broadnose sevengill shark (Notorynchus cepedianus) fish species and Broadnose sevengill shark information

Scientific Name
Notorynchus cepedianus

Common Name
Broadnose sevengill shark

Biology
Found on the continental shelf, often in shallow water (Ref. 247). Occurs close inshore, in bays and estuaries (Ref. 6871), with larger individuals ranging into deeper waters offshore and deep channels in bays (Ref. 247). Usually cruising steadily and slowly near the bottom (sometimes in water as shallow as a meter), but sometimes at the surface (Ref. 247). Can dash at speed when attacking prey (Ref. 247). Feeds on anything, including other sharks, rays, chimaeras, bony fish, hagfish, dolphin and porpoise meat, seals, shark egg cases, sea snails and mammalian carrion, including rats and humans (Ref. 5578). Ovoviviparous (Ref. 50449), with 82 to 95 young in a litter (Ref. 31395). Aggressive when provoked, and regarded as potentially dangerous to people in open waters (Ref. 247). It has attacked divers in captivity and may be involved in a few shark attacks

Classification

Classified By

P?ron, 1807

Class

Sharks and Rays (Elasmobranchii)

Order

Frill and cow sharks (Hexanchiformes)

Family

Cow sharks (Hexanchidae)

Distribution

Region

Circumglobal

Distribution

Circumglobal: In tropical to temperate waters; except North Atlantic and Mediterranean Sea. Southwest Atlantic: southern Brazil to northern Argentina. Southeast Atlantic: Namibia to East London, South Africa (Ref. 5578). Western Pacific: southern Japan to New Zealand. Eastern Pacific: British Columbia, Canada to Chile. Record from India maybe erroneous.

Range

56°N - 55°S, 131°W - 177°E

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

570 m

Zone

demersal

Environment

Marine; demersal; depth range 0 - 570 m (Ref. 26346), usually ? - 80 m (Ref. 5578)

Trophic Level

4.6 s.e. 0.71 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

True

Physical Size and Genetics

Maximum Length

300 cm

Common Length

150 cm

Phylogenetic Diversity Index

PD50 = 1.0781 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial; gamefish: yes; aquarium: public aquariums

Vulnerability

High vulnerability (57 of 100)

Resilience

Very Low, minimum population doubling time more than 14 years (rm=0.026; K=0.25; tm=16; tmax=32; Fec=82-95)

Threat To Humans

Traumatogenic (Ref. 247)

IUCN Red List Status

Data deficient (DD)

Broadnose sevengill shark (Notorynchus cepedianus) fish species and information / pictures of Broadnose sevengill shark - Notorynchus cepedianus

Broadnose sevengill shark (Notorynchus cepedianus) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population