Acipenser baerii  Brandt, 1869

Siberian sturgeon
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Acipenser baerii
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Acipenseriformes (Sturgeons and paddlefishes) > Acipenseridae (Sturgeons) > Acipenserinae
Etymology: Acipenser: Latin, acipenser = sturgeon, 1853 (Ref. 45335).

Environment / Climate / Range Ecology

Marine; freshwater; brackish; demersal; pH range: 7.0 - 7.5; dH range: ? - 20; potamodromous (Ref. 57765); depth range 0 - 200 m (Ref. 57765), usually 1 - 8 m (Ref. 57765).   Temperate; 1°C - 19°C (Ref. 57765); 74°N - 46°N, 64°E - 162°E

Length at first maturity / Size / Weight / Age

Maturity: Lm 86.9, range 65 - 167 cm
Max length : 200 cm TL male/unsexed; (Ref. 40476); max. published weight: 210.0 kg (Ref. 59043); max. reported age: 63 years (Ref. 57765)

Short description Morphology | Morphometrics

Extended snouts; four barbels in front of the mouth (Ref. 4639). The back is light grey to dark brown colored. The belly color varies from white to clear yellow. Five row s of scutes: 10-19D, 32-59L, 7-16V. Small star-like scutes between the main ones. Clearly slit inferior lip (Ref. 40476).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Asia: Siberia, rivers Ob, Irtysh, Yenisei, Lena, Kolyma, Khatanga, Pyasina, Anabar, Olenyok, Yana and Lake Baikal (Ref. 57765). Non-migratory populations exist in all river systems (Ref. 57765). International trade restricted (CITES Appendix II, since 1.4.1998).

Biology     Glossary (e.g. epibenthic)

Found in deep and shallow parts of rivers, with moderate to swift current usually at depths of 1 to 8 m (Ref. 57765). Adults live essentially in freshwater although some fish frequently occur in estuaries. Males are sexually mature between 9 and 29 years; females between 9 and 34 years (Ref. 57765). Spawn in main river channel over stone-gravel or gravel-sand bottom and with strong current (Ref. 59043).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Anadromous species. In a natural environment, males reach sexual maturity at 9-1 5 years of age and females at 16-20 years (in water recirculation systems, sexual maturity can first occur at 5 years). Spawning happens in the summer and generally every two years. Membranes on eggs become increasingly more sticky after fertilization and this allows them to stick to the substratum. This can become a problem in nurseries, but it is solved by washing the eggs in clay or diatomaceous earth suspensions. Caviar (not fecundated ovocites ) can be over 1 0% of the corporal weight of a mature female. Incubation lasts about 1 6 days (at 10-1 5°). Larvae development lasts about 20 days (at 18°). Egg size 3.0-3.6 mm, larval length at hatching 10-12 mm.

Main reference Upload your references | References | Coordinator | Collaborators

Baillie, J. and B. Groombridge (eds.), 1996. 1996 IUCN red list of threatened animals. IUCN, Gland, Switzerland. 378 p. (Ref. 12255)

IUCN Red List Status (Ref. 96402)

  Endangered (EN) (A2bcd+4bcd)

CITES (Ref. 94142)

Threat to humans

  Harmless




Human uses

Fisheries: highly commercial; aquaculture: commercial; aquarium: public aquariums
FAO(Aquaculture: production, species profile; fisheries: species profile; publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00245 (0.00142 - 0.00424), b=3.30 (3.16 - 3.44), based on LWR estimates for species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.2 se; Based on diet studies.
Resilience (Ref. 69278):  Very Low, minimum population doubling time more than 14 years (tm=7-34; tmax=63; Fec=16,500-420,000; K=0.03).
Vulnerability (Ref. 59153):  Very high vulnerability (85 of 100) .
Price category (Ref. 80766):   Unknown.