分類 / Names
共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
(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
; 新鮮な水 底生の漂泳性; 深さの範囲 5 - 20 m (Ref. 1998), usually 5 - 6 m (Ref. 1998). Temperate; ? - 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.
サイズ / 重さ / 年齢
Maturity: Lm ?  range ? - ? cm
Max length : 70.0 cm TL オス/雌雄の選別がない; (Ref. 40637); common length : 23.4 cm TL オス/雌雄の選別がない; (Ref. 12193); 最大公表体重: 2.9 kg (Ref. 40637); 最大記録サイズ: 17 年 (Ref. 72462)
背面の脊椎 (合計): 0; 背鰭 (合計): 11-15; 肛門の骨 0; 臀鰭: 10 - 13; 脊つい: 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.
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).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
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)
CITES (Ref. 123416)
水産業: 少数商業の; ゲームフィッシュ: はい
協力者画像Stamps, Coins Misc.音シガテラ（食中毒の名前）速度泳ぐ 型式カマOtoliths脳視覚
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00407 - 0.00617), b=3.18 (3.12 - 3.24), in cm total length, based on LWR estimates for this species (Ref. 93245
栄養段階 (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.
回復力 (Ref. 120179
): 低い, ４．５年～１４年の倍増期間の最小個体群 (tmax=14).
弱み (Ref. 59153
): High vulnerability (55 of 100) .