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Acipenser baerii
Picture by Hartl, A.
Pictures | Videos | Stamps, coins, misc. | Google image
Picture by Hartl, A.
Common names from other countries
Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Chondrostei (sturgeons) > Acipenseriformes (Sturgeons and paddlefishes) > Acipenseridae (Sturgeons) > Acipenserinae
Etymology: Acipenser: Latin, acipenser = sturgeon, 1853 (Ref. 45335).
Eponymy: Karl Ernst von Baer (Karl Maksimovich) (1792–1876) was a versatile and well-travelled Estonian of German extraction, a naturalist and explorer of Siberia, Novaya Zemlya and the Caspian Sea region. [...] (Ref. 128868), visit book page.
Etymology: Acipenser: Latin, acipenser = sturgeon, 1853 (Ref. 45335).
Eponymy: Karl Ernst von Baer (Karl Maksimovich) (1792–1876) was a versatile and well-travelled Estonian of German extraction, a naturalist and explorer of Siberia, Novaya Zemlya and the Caspian Sea region. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range Ecology
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
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).
Length at first maturity / Size / Weight / Age
Maturity: Lm 95.5, 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)
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 Identification keys | 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).
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
Potamodromous species (Ref. 57765). 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°). Larval 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. 130435: Version 2024-1)
Critically Endangered (CR) (A2bd); Date assessed: 14 September 2019
Threat to humans
Harmless
Human uses
Fisheries: highly commercial; aquaculture: commercial; aquarium: public aquariums
FAO(Aquaculture systems: production, species profile; Fisheries: species profile; publication : search) | FishSource | Sea Around Us
More information
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Reproduction
Maturity
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Anatomy
Gill area
Brain
Otolith
Gill area
Brain
Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Tools
Bio-Quiz | E-book | Field guide | Length-frequency wizard | Life-history tool | Point map | Classification Tree
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Special reports
Download XML
Internet sources
Alien/Invasive Species database | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes(genus, species) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref. 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00257 (0.00150 - 0.00440), b=3.28 (3.13 - 3.43), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic level (Ref. 69278): 3.3 ±0.2 se; based on diet studies.
Resilience (Ref. 120179): Very Low, minimum population doubling time more than 14 years (tm=7-34; tmax=63; Fec=16,500-420,000; K=0.03).
Fishing Vulnerability (Ref. 59153): Very high vulnerability (87 of 100).