Coregonus nelsonii, Alaska whitefish : fisheries, gamefish

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Coregonus nelsonii Bean, 1884

Alaska whitefish
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Coregonus nelsonii
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drawing shows typical fish in this Family.

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

条鰭類 > Salmoniformes (Salmons) > Salmonidae (Salmonids) > Coregoninae
Etymology: Coregonus: Greek, kore = pupils of the eye + Greek, gonia = angle (Ref. 45335).  More on author: Bean.

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

; 新鮮な水 底生の漂泳性; potamodromous (Ref. 27547).   Boreal; 68°N - 59°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: 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).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 56.0 cm TL オス/雌雄の選別がない; (Ref. 5723)

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): 11-13; 肛門の骨 0; 臀鰭: 10 - 14; 脊つい: 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).

生物学     用語集 (例 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).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

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).

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. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 食糧水産; 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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生産力

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Age/Size
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Length-length
体長組成
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)
速度
泳ぐ 型式
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Otoliths

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インターネットの情報源

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(ゲノム, ヌクレオチド) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | 生命の木 | Wikipedia(行く, 検索する) | World Records Freshwater Fishing | Zoobank | 動物に関する記録

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00537 (0.00266 - 0.01086), b=3.22 (3.05 - 3.39), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.5   ±0.43 se; based on food items.
回復力 (Ref. 120179):  手段, 1.4年~4.4年の倍増期間の最小個体群 (tm=3-5).
弱み (Ref. 59153):  Moderate to high vulnerability (54 of 100) .
価格帯 (Ref. 80766):   Very high.