分類 / Names
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Teleostei >
Salmoniformes (Salmons)
鮭形目 (Salmons) >
Salmonidae (Salmonids)
鮭科 (Salmonids) > Coregoninae
Etymology: Prosopium: Greek, prosopon = face (Ref. 45335); coulterii: Named after Dr. J.M. Coulter, a distinguished botanist..
More on authors: Eigenmann & Eigenmann.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性; 深度上下限 18 - 168 m (Ref. 27547), usually 55 - 70 m (Ref. 1998). 溫帶; 59°N - 47°N
North America: three disjunct areas: Lake Superior in Ontario, Canada and Michigan, USA; Yukon River drainage in Yukon, Canada to Columbia River drainage in western Montana and Washington, USA; and Chignik, Naknek and Wood River drainages in southwest Alaska. Europe: Russia (Ref. 26334).
北美洲: 三個分離的區域: 在加拿大安大略省與密西根州的秀克必李耳湖; 在育空的育空河流域在加拿大對在西方的蒙大納與美國在華盛頓州中的哥倫比亞河流域; 而且 Chignik ， Naknek 與在阿拉斯加州西南部的木材河流域。 前蘇聯: 俄國.(參考文獻 26334)
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 28.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 5723); common length : 11.5 cm TL 雄魚/尚未辨別雌雄; (Ref. 12193); 最大年齡: 9 年 (Ref. 10320)
背棘 (總數) : 0; 背的軟條 (總數) : 10 - 13; 臀棘: 0; 臀鰭軟條: 10 - 14; 脊椎骨: 49 - 55. Body elongate, almost cylindrical. Head elongate, its length slightly greater than body depth; eye relatively large, its diameter greater than snout length; snout bluntly rounded, overhanging mouth, not obviously pointed, a single flap of skin present between nostrils. Nuptial tubercles developed in both males and females, but more conspicuous in males, and occur on top of head, on scales on back and sides, and on paired fins. Body is brownish above, silvery on sides and white below. Dorsal, caudal, and pectoral fins usually clear, anal and pelvic whitish and immaculate, a faint dark spot sometimes present on base of caudal fin. A series of 12 - 14 similar spots present along the midline of the back, and 7 - 14 dark, round or oval parr marks with diffuse borders present along the lateral line of young and sub adults, although some Alaskan forms retain parr marks even on largest fish.
細長的身體, 幾乎圓筒形。 頭部延長, 它的長度些微大於體高; 眼相當大的, 它的直徑大於吻的長度; 吻鈍圓形﹐懸在嘴上, 不是明顯尖, 一個皮蓋在鼻孔之間呈現。 珠星發展的在雄性與雌性中, 但是更顯著的在雄性中, 而且生存在頭頂上面, 在鱗片上背面與側邊, 與在偶鰭上。 身體在側邊上是上方褐色的, 銀色的與腹面白色的。 背鰭、尾鰭與胸鰭通常清澈的, 臀鰭與腹鰭微白色而無斑點的, 一個模糊的深色斑點在尾鰭基底上有時候有。 一系列的 12- 14個相似的斑點存在的沿著背部的中線 , 與 7- 14個深色的﹐圓的或橢圓形的幼鮭橫帶有擴散的邊緣存在的沿著幼魚與亞成魚的側線, 雖然一些阿拉斯加型甚至在大的魚上保有幼鮭橫帶。
Inhabits lakes and rivers of mountainous areas (Ref. 1998). Feeds mainly on crustaceans and aquatic insect larvae (Ref. 1998). Minimum depth reported from Ref. 1998.
棲息於多山區域的湖與河。 (參考文獻 1998) 主要吃甲殼動物與水生的昆蟲幼生。 (參考文獻 1998) 最小深度記錄自了參考文獻 1998.
Moves to spawning grounds in the early winter and presumably back into deeper water after spawning. Spawns at night, presumably the eggs are broadcast, settling into interstices in the gravel. Hatching occurs the following spring (Ref. 27547).北美洲: 三個分離的區域: 在加拿大安大略省與密西根州的秀克必李耳湖; 在育空的育空河流域在加拿大對在西方的蒙大納與美國在華盛頓州中的哥倫比亞河流域; 而且 Chignik ， Naknek 與在阿拉斯加州西南部的木材河流域。 前蘇聯: 俄國.(參考文獻 26334)
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)
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漁業: 沒有興趣; 游釣魚種: 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=0.00457 (0.00242 - 0.00864), b=3.14 (2.96 - 3.32), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 3.1 ±0.35 se; based on food items.
Generation time: 2.0 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (tm=1-2; tmax=9; Fec=103).
Fishing Vulnerability (Ref.
59153): Low vulnerability (25 of 100).
