Starry sturgeon (Acipenser stellatus) fish species and information / pictures of Starry sturgeon - Acipenser stellatus

Starry sturgeon (Acipenser stellatus) fish species information

Scientific Name
Acipenser stellatus

Common Name
Starry sturgeon

Biology
At the sea, it occurs in coastal and estuarine zones and forages on the bottom mostly on clayey sand and intensively in the middle and upper water layers (Ref. 59043). Found mainly near shore over sand and mud, stays at the bottom during the day and rises to the surface to feed at night. Feeds mainly on fish, also mollusks, crustaceans and worms (Ref. 3193). Spawns in strong-current habitats in main course of large and deep rivers, on stone or gravel bottom. Spawning also takes place on flooded river banks and if gravel bottom is not available, on sand or sandy clay. Juveniles stay in shallow riverine habitats during first summer (Ref. 59043). One of the three most important species for caviar; also utilized fresh and frozen; eaten pan-fried, broiled and baked (Ref. 9988). Overfishing at the sea for meat and caviar will soon cause extinction of the natura

Classification

Classified By
Pallas, 1771
Class
Ray-finned fishes (Actinopterygii)
Order
Sturgeons and Paddlefishes (Acipenseriformes)
Family
Sturgeons (Acipenseridae)

Distribution

Region
Eurasia
Distribution
Eurasia: Caspian, Black, Azov and Aegean Seas, ascending rivers to spawn. Occurrence in Albania needs confirmation. Introduced in Aral Sea. Artificially propagated (Ref. 6866). Appendix III of the Bern Convention (protected fauna). International trade restricted (CITES II, since 1.4.98; CMS Appendix II).
Range
61°N - 36°N, 22°E - 54°E

Environment

Climate
Temperate
Water Temperature From
10 °C
Water Temperature To
20 °C
Depth From - meters
10 m
Depth To - meters
100 m
Zone
demersal
Environment
Marine; freshwater; brackish; demersal; anadromous (Ref. 51243); depth range 10 - 100 m
Trophic Level
3.1 s.e. 0.30 Based on diet studies.
Occurs in Marine / Salt water
True
Occurs in Brackish water
True
Occurs in Fresh Water
True
Occurs on Reefs
False
Is kept in Aquariums
True

Physical Size and Genetics

Maximum Length
220 cm
Common Length
125 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: commercial; aquaculture: commercial; aquarium: public aquariums
Vulnerability
High vulnerability (64 of 100)
Resilience
Low, minimum population doubling time 4.5 - 14 years (K=0.06; tm=9; tmax=27; Fec=20,000-360,000)
Threat To Humans
  Harmless
IUCN Red List Status
  Critically Endangered (CR) (A2cde)