African dwarf sawshark (Pristiophorus nancyae) fish species and information / pictures of African dwarf sawshark - Pristiophorus nancyae

African dwarf sawshark (Pristiophorus nancyae) fish species information

Scientific Name
Pristiophorus nancyae

Common Name
African dwarf sawshark

Biology
This species is poorly known, occurring at the upper continental slope in tropical waters, at depths of 286?500 m. Stomach contents of 8 individuals include an unidentified organic material, partially digested shrimplike crustaceans, and a small decapod shrimp; no fish or cephalopod remains were apparent in the samples. Larger individuals had small puncture marks and elongated parallel cuts on their backs and tails suggestive of combat injuries from the rostra of other sawsharks. Unknown litter size. Caught and discarded as bycatch by offshore shrimp trawlers and other deepwater fisheries operations off Mozambique (Ref. 87357).

Classification

Classified By
Ebert & Cailliet, 2011
Class
Ray-finned fishes (Actinopterygii)
Order
Perch-like fish (Perciformes)
Family
Billfishes (Istiophoridae)

Distribution

Region
Western Indian Ocean
Distribution
Western Indian Ocean: Mozambique. Records from off Somalia and the Arabian Sea off Pakistan apparently different (possibly undescribed species).
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
286 m
Depth To - meters
500 m
Zone
pelagic-oceanic
Environment
Marine; pelagic-oceanic; depth range 286 - 500 m (Ref. 87357)
Trophic Level
s.e. 0.00 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
62.0 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 0.5312 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Unknown
Vulnerability
Low to moderate vulnerability (29 of 100)
Resilience
Unknown
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated