分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Salmoniformes (Salmons) >
Salmonidae (Salmonids) > Coregoninae
Etymology: Prosopium: Greek, prosopon = face (Ref. 45335); williamsoni: Named after Lieut. R. S. Williamson of the U.S. Pacific Railroad Exploration..
More on author: Girard.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性; 深度上下限 5 - 20 m (Ref. 1998), usually 5 - 6 m (Ref. 1998). 溫帶; ? - 23°C (Ref. 12741); 68°N - 39°N
North America: Mackenzie River drainage in Northwest Territory, Canada south through western Canada and northwestern USA in the Pacific, Hudson Bay and upper Missouri River basins to Truckee River drainage in Nevada and Sevier River drainage in Utah, USA.
北美洲: 領土西北部的麥肯茲河流域在加拿大南至在內華達州與在美國猶他州的 Sevier 河流域的太平洋, 哈得遜灣與 Truckee 河流域的密蘇里河流域上游的加拿大西部與在西北部的美國。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 70.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 40637); common length : 23.4 cm TL 雄鱼/尚未辨别雌雄; (Ref. 12193); 最大体重: 2.9 kg (Ref. 40637); 最大年龄: 17 年 (Ref. 72462)
背棘 (总数) : 0; 背的软条 (总数) : 11 - 15; 臀棘: 0; 臀鳍软条: 10 - 13; 脊椎骨: 53 - 61. Body slender, elongate, nearly cylindrical in cross section but variable, more compressed laterally than round whitefish. Head short; eye moderate, its diameter less than snout length; snout more or less pointed, compressed laterally, pinched, rounded in lateral view, a single flap of skin present between nostrils. Mouth small, ventral in position, overhung by snout; maxillaries extending posteriorly almost to anterior margin of eye in adults. Teeth small, restricted to a small patch on tongue and on gill rakers in adults, although small teeth may be present on the premaxillaries in young, but absent from jaws, vomer, palatines and pre maxillae in adults. Overall coloration silvery, but light or dark brown or olive on back, becoming silvery in sides and white below. Scales, specially on back, may have pigmented borders. dorsal fin often dusky, pelvic and pectoral fins in adults with amber tint.
身体细长的, 延长, 几乎圆筒形的横切面但是可变的, 更扁长形的侧面地超过圆的白鲸。 头部短; 眼中等的, 它的直径少于吻的长度; 吻约略尖的, 扁长形的侧面地, 掐了, 在侧面中圆的, 一个皮盖在鼻孔之间呈现。 嘴小的, 腹面位置, 吻悬在上面; 向后延伸的上颌骨几乎到眼的前缘当成鱼时。 齿小的, 局限于在舌上的一个小块而且在鳃耙上，当成鱼时，虽然小的齿可能是位于前上颌骨之上当幼鱼时, 但是颚，犁骨，颚骨与前小颚没有出现当成鱼时。 整体的颜色银色的, 但是淡或深褐色或橄榄色背面, 在侧边中变成银色与腹面白色的。 鳞片，特别地背面，可能有有颜色边缘。 背鳍时常暗色的, 腹鳍与胸鳍在成鱼有琥珀色的色彩。
Occurs in lakes and fast, clear or silty streams. Feeds mainly on benthic organisms such as aquatic insect larvae, mollusks, fishes, and fish eggs (including their own) but may feed on plankton and surface insects when the need arises (Ref. 1998).
出现于湖与快速的，清澈的或淤泥的溪流。 主要吃底栖的生物例如水生的昆虫幼生，软件动物，鱼与鱼卵 (包括他们自己的) 但是可能吃浮游生物与水面的昆虫当需要时.(参考文献 1998)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
北美洲: 領土西北部的麥肯茲河流域在加拿大南至在內華達州與在美國猶他州的 Sevier 河流域的太平洋, 哈得遜灣與 Truckee 河流域的密蘇里河流域上游的加拿大西部與在西北部的美國。
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)
人类利用
渔业: 低经济; 游钓鱼种: 是的
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00411 - 0.00611), b=3.19 (3.14 - 3.24), in cm total length, based on LWR estimates for this species (Ref.
93245).
营养阶层 (Ref.
69278): 3.7 ±0.1 se; based on diet studies.
Generation time: 6.8 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
回复力 (Ref.
120179): 低的, 最小族群倍增时间4.5 - 14 年 (tmax=14).
Fishing Vulnerability (Ref.
59153): High vulnerability (55 of 100).
