Prosopium williamsoni, Mountain whitefish : fisheries, gamefish

Prosopium williamsoni (Girard 1856)

Mountain whitefish
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Prosopium williamsoni
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分類 / Names 共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

> 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 生態学

; 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

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | Faunafri

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)

簡単な記述 形態学 | 形態計測学

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.

生物学     用語集 (例 epibenthic)

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 | | 生産力 | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

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)

IUCNのレッドリストの状況は (Ref. 123251)


CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 少数商業の; ゲームフィッシュ: はい
FAO(Publication : search) | FishSource |

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共通名の
類義語
代謝
捕食動物
生態毒性
繁殖
成熟
放精
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形態計測学
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参考文献
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シガテラ(食中毒の名前)
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インターネットの情報源

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 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) .
価格帯 (Ref. 80766):   Very high.