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Acipenseriformes (Sturgeons and paddlefishes) >
Acipenseridae (Sturgeons) > Acipenserinae
Etymology: Acipenser: Latin, acipenser = sturgeon, 1853 (Ref. 45335); medirostris: The specific name is derived from medirostris, referring to its moderate snout (Ref. 1998).
More on author: Ayres.
Environment: milieu / climate zone / depth range / distribution range
بوم شناسي
دريايي; آب شيرين; لب شور نزديك كف زي; رود کوچ (Ref. 120652); تغييرات عمق 0 - 80 m (Ref. 50610). Temperate; 10°C - 20°C (Ref. 2059); 65°N - 32°N, 166°W - 114°W (Ref. 54261)
North America: Aleutian Islands and the Gulf of Alaska to Ensenada, Mexico. Considered vulnerable in Canada. The Asian population is now considered to be a separate species Acipenser mikadoi (Ref. 6866).
Length at first maturity / Size / Weight / سن
Maturity: Lm ?, range 162 - ? cm
Max length : 270 cm TL جنس نر / بدون خواص جنسي; (Ref. 96339); common length : 130 cm TL جنس نر / بدون خواص جنسي; (Ref. 12193); بيشينه وزن گزارش شده: 159.0 kg (Ref. 2850); بيشينه سن گزارش شده: 60 سال ها (Ref. 72476)
خارهاي باله پشتي (کل) : 0; شعاع نرم باله پشتي (کل) : 33 - 35; خارهاي باله مخرجي: 0; شعاع نرم باله مخرجي: 22 - 28. Characterized by a single row of 1 to 4 bony plates along the midventral line between the anus and the anal fin, and about 33 to 35 rays in the dorsal fin. Dorsal arises at posterior third of the total length; anal fin arises under posterior part of dorsal; pectorals originate low on the body just behind gill opening and are large and rounded; pelvic fins arise near the anus. Generally olive to dark green, lower parts more or less whitish green; a longitudinal olive-green stripe on side between lateral and ventrolateral plates, another on midventral surface; fins grayish to pale green (Ref. 27547). Barbels usually situated closer to mouth than to snout tip; coloration of scutes along side paler than skin (Ref. 86798).
Found in estuaries, lower reaches of large rivers, and in salt or brackish water off river mouths (Ref. 5723). Probably spawns in fresh water (Ref. 27547). May cover considerable distances in the ocean (Ref. 27547). Edible but with a disagreeable taste and unpleasant odor (Ref. 1998).
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
وضعيت در فهرست قرمز IUCN (Ref. 130435)
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: ارزش تحاري اندك; ماهي ها ي سرگرم كننده: بله
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
Estimates based on models
Preferred temperature (Ref.
123201): 9.1 - 12.7, mean 10.6 °C (based on 50 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00142 - 0.00736), b=3.17 (2.99 - 3.35), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.5 ±0.52 se; based on food items.
Generation time: 12.6 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
جهندگی (Ref.
120179): پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (K=0.05-0.09).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (80 of 100).
Climate Vulnerability (Ref.
125649): High to very high vulnerability (67 of 100).
Nutrients (Ref.
124155): Calcium = 14.8 [9.0, 24.9] mg/100g; Iron = 0.253 [0.156, 0.390] mg/100g; Protein = 17.7 [15.1, 20.3] %; Omega3 = 0.354 [0.202, 0.615] g/100g; Selenium = 22.6 [12.6, 42.8] μg/100g; VitaminA = 4.61 [1.77, 11.95] μg/100g; Zinc = 0.437 [0.320, 0.597] mg/100g (wet weight);
