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Coregonus nelsonii Bean, 1884

Alaska whitefish
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Salmoniformes (Salmons) 鮭形目 (Salmons) > Salmonidae (Salmonids) 鮭科 (Salmonids) > Coregoninae
Etymology: Coregonus: Greek, kore = pupils of the eye + Greek, gonia = angle (Ref. 45335).
Eponymy: Edward William Nelson (1855–1934) was an outstanding American naturalist. [...] (Ref. 128868), visit book page.
More on author: Bean.

Environment: milieu / climate zone / depth range / distribution range 生態學

; 淡水 底中水層性; 河川洄游 (Ref. 27547). 北方生物帶; 68°N - 59°N

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North America: Probably restricted to northern Northwest Territories, Yukon Territory in Canada and Alaska in Yukon River, Paxson Lake, Copper River system, Anderson River and Mackenzie River delta. Hybridizes with Stenodus leucichthys, probably a result of simultaneous broadcasting of reproductive products in the same area; occasionally hybridizes with Coregonus sardinella (Ref. 27547). Belongs to the Coregonus clupeaformis complex (Ref. 27547).
北美洲: 可能侷限於西北地區北部了, 在育空河， Paxson 湖，銅河流域，安德遜河與麥肯茲河三角州的加拿大與阿拉斯加州的育空河一帶。 與 Stenodus leucichthys 雜交, 可能在相同的區域中的生殖產品的一個同時廣播的結果; 偶然地與 Coregonus sardinella 雜交。 (參考文獻 27547) 屬於 Coregonus clupeaformis 複合體。 (參考文獻 27547)

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 56.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 5723)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

背棘 (總數) : 0; 背的軟條 (總數) : 11 - 13; 臀棘: 0; 臀鰭軟條: 10 - 14; 脊椎骨: 60 - 63. Distinguished by the gill rakers that are longer than 20% of the interorbital width, a total of 22 to 27 gill rakers on the first arch (with modal counts of 24 or 25), and a pronounced hump behind the head in adults (Ref. 27547). Adipose fin well developed, often larger in males; axillary process present in pelvic fins (Ref. 27547). Dark brown to midnight blue above fading to silver on sides and wide beneath; no parr marks in young (Ref. 27547).
區別的特徵為鰓耙那是長度超過 20% 的眼間骨寬度, 總數為 22 到 27個鰓耙在第一個弓 (具有型計數 24 或者 25) 上, 與一個明顯的隆起在頭部後面當成魚時.(參考文獻 27547) 脂鰭發展良好的, 時常比較大的在雄性中; 腋窩的突起出現在腹鰭。 (參考文獻 27547) 深褐色的對褪成的暗藍色上方在側邊上銀色的與寬的之下; 當幼魚時的沒有幼鮭橫帶.(參考文獻 27547)

生物學特性     字彙 (例如 epibenthic)

Occurs in small to large rivers (Ref. 5723). Rarely enters lakes (Ref. 5723). Makes fairly extensive upstream and downstream movements related to spawning runs (Ref. 27547). Feeds mainly on immature insects (Ref. 27547). Usually does not feed during the latter part of the spawning run (Ref. 27547). Excellent food fish but usually not eaten (Ref. 27547).

出現於小型到大型河川。 (參考文獻 5723) 很少進入湖。 (參考文獻 5723) 進行非常大規模的被與產卵迴游有關的溯河及順流的運動。 (參考文獻 27547) 主要吃不成熟的昆蟲。 (參考文獻 27547) 通常在後者產卵迴游的部份的時候不進食。 (參考文獻 27547) 優良的食用魚但是通常不吃.(參考文獻 27547)

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚

The spawning run involves an upward migration beginnning as early as late June. The spawning act occurs at night or during the day. A female begins to swim vertically toward the surface, belly upstream. A male (sometimes 2 or 3) joins her and eggs and milt are released as fish approach the surface. The fish break the surface, fall away from each other and return to the bottom. After spawning most move downstream. The young of the year move downstream during their first year and do not return until they are sexually mature. Generally, the same spawning grounds are utilized yearly (Ref. 27547).北美洲: 可能侷限於西北地區北部了, 在育空河， Paxson 湖，銅河流域，安德遜河與麥肯茲河三角州的加拿大與阿拉斯加州的育空河一帶。 與 Stenodus leucichthys 雜交, 可能在相同的區域中的生殖產品的一個同時廣播的結果; 偶然地與 Coregonus sardinella 雜交。 (參考文獻 27547) 屬於 Coregonus clupeaformis 複合體。 (參考文獻 27547)

主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

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 瀕危狀態 (Ref. 130435: Version 2024-1)

未評估 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00537 (0.00264 - 0.01091), b=3.22 (3.05 - 3.39), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.5   ±0.43 se; based on food items.
回復力 (Ref. 120179):  中等的, 族群倍增時間最少 1.4 - 4.4年 (tm=3-5).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (42 of 100).
價格種類 (Ref. 80766):   Very high.