分类 / Names
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Chondrostei >
Acipenseriformes (Sturgeons and paddlefishes) >
Acipenseridae (Sturgeons) > Scaphirhynchinae
Etymology: Scaphirhynchus: Greek, skaphe, -eos = boat + Greek, rhyngchos = snout (Ref. 45335); albus: From the word albus, meaning white (Ref. 10294).
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的; 河川洄游 (Ref. 51243). 亞熱帶的; 44°N - 30°N
North America: nearly restricted to main channels of Missouri River and lower Mississippi River from Montana to Louisiana in USA.
北美洲: 幾乎侷限於在美國的密蘇里河的主水道與密西西比河下游從蒙大納到路易斯安那了。 國際間的買賣限制。 ( 引用2, 自從 1.4.98 以後)
Length at first maturity / 大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 200 cm TL 雄鱼/尚未辨别雌雄; (Ref. 58490); common length : 81.7 cm TL 雄鱼/尚未辨别雌雄; (Ref. 12193); 最大体重: 130.0 kg (Ref. 52332); 最大年龄: 41 年 (Ref. 32514)
简单描述
检索表 | 型态特徵 | 形态测量图
Absence of scalelike scutes on belly; bases of outer barbels usually behind bases of inner barbels (Ref. 86798).
Adults inhabit large, deep, turbid river channels, usually in strong current over firm sand or gravel (Ref. 10294, 58490). They feed on aquatic insect immatures, particularly caddisfly larvae, and small fish (Ref. 10294). Threatened due to over harvesting and habitat loss (Ref. 58490). No length type given but assumed to be in TL.
栖息于大的，深的，和浑浊的河道, 通常在硬沙或砾石上的强水流。
北美洲: 幾乎侷限於在美國的密蘇里河的主水道與密西西比河下游從蒙大納到路易斯安那了。 國際間的買賣限制。 ( 引用2, 自從 1.4.98 以後)
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1991. Common and scientific names of fishes from the United States and Canada. Am. Fish. Soc. Spec. Publ. (20):183 p. (Ref. 3814)
世界自然保护联盟红皮书 (Ref. 130435)
极度濒危 (CR) (A2bcde); Date assessed: 08 December 2020
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00407 (0.00149 - 0.01114), b=3.16 (2.92 - 3.40), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.9 ±0.63 se; based on food items.
Generation time: 16.8 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
回复力 (Ref.
120179): 低的, 最小族群倍增时间4.5 - 14 年 (tm=5-15; Fec=170,000, tmax=41(based on 1 specimen only)).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (67 of 100).
