Environment: milieu / climate zone / depth range / distribution range
Ecologie
; marien; zoetwater; brakwater demersaal; anadroom (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. International trade restricted (CITES II, since 1.4.98; CMS Appendix II).
Length at first maturity / Size / Gewicht / Leeftijd
Maturity: Lm 108.8, range 96 - 125 cm
Max length : 300 cm TL mannelijk/geslacht niet bekend; (Ref. 40142); Maximaal gepubliceerd gewicht: 190.0 kg (Ref. 40142); Maximaal vermelde leeftijd: 65 jaren (Ref. 56448)
Dorsale stekels (totaal): 0; Dorsale zachte stralen (totaal): 38-53; Anale stekels 0; Anale zachte stralen: 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)
Status op de Rode Lijst van het IUCN (Ref. 125652)
Gevaarlijk voor mensen
Harmless
Gebruik door de mens
Visserij: commercieel
Meer informatie
ReferentiesAquacultuurAquacultuurprofielKweeklijnenGeneticaAlleelfrequentiesErfelijkheidZiektenVerwerkingNutrientsMass conversion
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Estimates based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00269 (0.00166 - 0.00436), b=3.24 (3.11 - 3.37), in cm total length, based on LWR estimates for species & Genus-BS (Ref.
93245).
Trophic level (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.
Weerstandsvermogen (Ref.
120179): zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (tm=8-14; Fec=29,000).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (87 of 100) .
Climate Vulnerability (Ref.
125649): (0 of 100) .
Nutrients (Ref.
124155): Calcium = 15.7 [7.7, 30.8] mg/100g ; Iron = 0.227 [0.138, 0.386] mg/100g ; Protein = 16.6 [13.9, 19.4] % ; Omega3 = 0.672 [0.327, 1.397] g/100g ; Selenium = 32.1 [15.0, 81.7] μg/100g ; VitaminA = 6 [2, 19] μg/100g ; Zinc = 0.481 [0.312, 0.760] mg/100g (wet weight);
