Classification / Names
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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.
Environment: milieu / climate zone / गहराई सीमा / distribution range
पारिस्थितिकी
; स्वच्छ जल, अलवण जल; खारा ड़िमरसल; pH range: 7.0 - 7.5; dH range: ? - 20; पोटामोड़िरोमस (Ref. 57765); गहराई सीमा 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
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 / आकार / वज़न / Age
परिपक्व अवधि: Lm 95.5, range 65 - 167 cm
Max length : 200 cm TL पुल्लिंग / अलिंग; (Ref. 40476); अधिकतम प्रकाशित वज़न: 210.0 kg (Ref. 59043); अधिकतम सूचित उम्र: 63 वर्षो (Ref. 57765)
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).
Body shape (shape guide): elongated.
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).
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.
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 2025-1)
Threat to humans
Harmless
Human uses
मात्स्यिकी: उच्च वाणिज्य; जलीयकृषि: व्यापारिक; जलजीवालय: सार्वजनिक लजीवालय
साधन
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इंटरनेट स्रोत
Estimates based on models
Phylogenetic diversity index (संदर्भ
82804): PD
50 = 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 (संदर्भ
69278): 3.3 ±0.2 se; based on diet studies.
लौटाव (संदर्भ
120179): बहुत नीचे, न्यूनतम जनसंख्या दुगनी समय अवलागत 14 महीने। (tm=7-34; tmax=63; Fec=16,500-420,000; K=0.03).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (87 of 100).
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Nutrients (Ref.
124155): Calcium = 15.6 [9.1, 26.8] mg/100g; Iron = 0.253 [0.156, 0.402] mg/100g; Protein = 17.3 [14.8, 20.1] %; Omega3 = 0.381 [0.218, 0.653] g/100g; Selenium = 25.6 [13.5, 47.2] μg/100g; VitaminA = 6.04 [2.17, 16.19] μg/100g; Zinc = 0.514 [0.371, 0.719] mg/100g (wet weight);
