Dwarf sturgeon (Pseudoscaphirhynchus hermanni) fish species and information / pictures of Dwarf sturgeon - Pseudoscaphirhynchus hermanni

Dwarf sturgeon (Pseudoscaphirhynchus hermanni) fish species information

Scientific Name
Pseudoscaphirhynchus hermanni

Common Name
Dwarf sturgeon

Biology
A rare and endangered species; smallest sturgeon; sensitive to chemicals in the water Ref. 35930).

Classification

Classified By

Kessler, 1877

Class

Ray-finned fishes (Actinopterygii)

Order

Sturgeons and Paddlefishes (Acipenseriformes)

Family

Sturgeons (Acipenseridae)

Distribution

Region

Former USSR and Asia

Distribution

Former USSR and Asia: Endemic to the basin of Amu Dariya and Sir Dariya rivers (Ref. 35930). Considered endangered or extinct by authors (Ref. 6866). Registered in the International trade restricted (CITES II, since 1.4.98; CMS Appendix II); 1984 USSR Red Book; 1985 Turkmen SSR Red Data Book; 1996 IUCN Red List; and, 1997 CITES Lists (Ref. 35930).

Range

Unknown

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

demersal

Environment

Freshwater; brackish; demersal; potamodromous (Ref. 51243)

Trophic Level

3.15 s.e. 0.38 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

False

Occurs in Brackish water

True

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

27.5 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.6250 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: of no interest

Vulnerability

Low to moderate vulnerability (30 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (tmax=6)

Threat To Humans

Harmless

IUCN Red List Status

Critically Endangered (CR) (A2c)