Coregonus nelsonii, Alaska whitefish : fisheries, gamefish

Coregonus nelsonii Bean, 1884

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

Classification / Names Noms communs | Synonymes | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinoptérygiens (poissons à nageoires rayonnées) > 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 Écologie

; eau douce benthopélagique; potamodrome (Ref. 27547).   Boreal; 68°N - 59°N

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | 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).

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 56.0 cm TL mâle / non sexé; (Ref. 5723)

Description synthétique Morphologie | Morphométrie

Épines dorsales (Total): 0; Rayons mous dorsaux (Total): 11-13; Épines anales 0; Rayons mous anaux: 10 - 14; Vertèbres: 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).

Biologie     Glossaire (ex. 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 Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

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).

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

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)

Statut dans la liste rouge de l'IUCN (Ref. 123251)

  Non évalué 

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

Pêcheries: pêcheries vivrières; pêche sportive: oui
FAO(Publication : search) | FishSource |

Plus d'informations

Pays
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Écosystèmes
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Écologie
Régime alimentaire
Éléments du régime alimentaire
Consommation alimentaire
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Noms communs
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Métabolisme
Prédateurs
Écotoxicologie
Reproduction
Maturité
Frai
Rassemblement de ponte
Fécondité
Œufs
Développement de l'œuf
Taille/Âge
Croissance
Longueur-poids
Longueur-longueur
Fréquences de longueurs
Morphométrie
Morphologie
Larves
Dynamique des populations larvaires
Recrutement
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Références
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Sources Internet

Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(génôme, nucléotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Arbre de Vie | Wikipedia(aller à, chercher) | World Records Freshwater Fishing | Zoobank | Zoological Record

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).
Niveau trophique (Ref. 69278):  3.5   ±0.43 se; based on food items.
Résilience (Ref. 120179):  Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (tm=3-5).
Vulnérabilité (Ref. 59153):  Moderate to high vulnerability (54 of 100) .
Catégorie de prix (Ref. 80766):   Very high.