Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري; المياه العذبة; مياه مخلوطة القاع; أسماك صاعدة (Ref. 26364). Temperate; 10°C - 20°C (Ref. 2059)
Asia: Endemic to the Amur River system. Two morphs, brown and gray, represent the species in the Amur River basin.
Occurrence in the Sea of Japan (Ref. 11102) needs confirmation.
Length at first maturity / الحجم / وزن / العمر
Maturity: Lm 108.8, range 96 - 125 cm
Max length : 300 cm TL ذكر/ مختلط الجنس; (Ref. 40142); أعلا وزن تم نشرة: 190.0 kg (Ref. 40142); العمر: 65 سنين (Ref. 56448)
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 38 - 53; شوكة شرجية: 0; أشعه شرجية لينه: 20 - 32. Body shields in 5 rows; dorsal shields 11 to 15, lateral shields 32 to 47 and ventral 7 to 10.
Adults occur in stretches of rivers with sandy or stony bottom. Feed on benthic organisms. Highly prized fish (Ref. 41072).
The gray morph females in the Amur River reproduce at least every four years (Ref. 40142).
IUCN, 1990. 1990 IUCN red list of threatened animals. IUCN, Gland, Switzerland and Cambridge, U.K. 288 p. (Ref. 3881)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
مصائد: تجاري
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00269 (0.00167 - 0.00434), b=3.24 (3.11 - 3.37), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.3 ±0.1 se; based on diet studies.
Generation time: 22.0 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
المرونه (Ref.
120179): منخفظ جدا, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أكثر من 14 سنة (tm=8-14; Fec=29,000).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (87 of 100).
Nutrients (Ref.
124155): Calcium = 13.5 [7.7, 23.3] mg/100g; Iron = 0.245 [0.148, 0.387] mg/100g; Protein = 17.5 [15.0, 20.2] %; Omega3 = 0.329 [0.180, 0.595] g/100g; Selenium = 23.9 [12.6, 47.1] μg/100g; VitaminA = 4.56 [1.63, 12.77] μg/100g; Zinc = 0.469 [0.334, 0.657] mg/100g (wet weight);
