Alaska country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: subsistence fisheries | Ref: Morrow, J.E., 1980
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs in most Alaskan rivers that empty into the Bering, Chukchi and Beaufort seas, throughout the Kuskokwim River drainage and well above Umiat in the Colville, and in the lower reaches of the Yukon (Ref. 27547). It extends eastward along the arctic coast at least to the Sagavanirktok River (Ref. 27547). Abundant only during spawning concentrations (Ref. 27547). A commercial operation on the Colville River delta takes about 1,000 fish annually (Ref. 28214). Also Ref. 6876, 28503, 96339, 119194, 121277.
National Checklist:
Country Information:
National Fisheries Authority: http://www.state.ak.us/local/akpages/FISH.GAME/adfghome.htm
Occurrences: Occurrences Point map
Main Ref: Morrow, J.E., 1980
National Database:

Common names from other countries

Siberian whitefish, Bottom Whitefish, Kropffelchen, ... more

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

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

Environment: milieu / climate zone / depth range / distribution range Ekologi

marina; sötvatten; brackvatten bottenlevande; anadrom (Ref. 51243). Polar; 71°N - 44°N, 5°W - 133°W

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Arctic Ocean basin, from Finland (lapland) to eastern Siberia, Alaska, and Canada eastward to Mackenzie drainage. Belongs to Coregonus clupeaformis complex (Ref. 27547).

Length at first maturity / Size / Vikt / Age

Maturity: L_m ?, range 17 - ? cm
Max length : 50.0 cm SL hane/ej könsbestämd; (Ref. 59043); common length : 32.8 cm TL hane/ej könsbestämd; (Ref. 12193); rapporterad maxålder: 14 år (Ref. 12193)

Short description Bestämningsnycklar | Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt) : 0; Mjukstrålar i ryggfenan (totalt) : 11 - 13; Taggstrålar i analfenan: 0; Mjukstrålar i analfenan: 10 - 14; Ryggkotor: 58 - 63. Distinguished by the gill rakers that are longer than 20% of the interorbital width, 19 to 25 gill rakers (with modal counts of 22 or 23), 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).

Inhabits coastal waters near shore (Ref. 5723), lower reaches of rivers with slow current, large lakes with tributaries, floodplain lakes, deltas and estuaries, brackish waters (Ref. 59043). Migrates up to more than 1,200 km inland for spawning (Ref. 5723). Overwinters near river mouths (Ref. 5723). There are non-migratory freshwater populations. Adults feed mostly on mollusks, crustaceans and chironomid larvae (Ref. 28219).

Life cycle and mating behavior Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

Upstream spawning migrations may be extensive but some populations seldom venture far upstream and still others may never go to sea at all (Ref. 593). Mature adults migrate upstream as early as June to spawn in October. It is assumed that the young hatch in late winter and spring, subsequently moving downstream, to return as mature adults 4 to 6 years later (Ref. 27547).

Main reference Upload your references | referenser | Koordinator | Medarbetare

Kottelat, M., 1997. European freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation. Biologia, Bratislava, 52/Suppl. 5:1-271. (Ref. 13696)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 01 January 2008

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fiskeri: kommersiell; Vattenbruk: kommersiell

FAO(Publication : search) | FishSource | Sea Around Us

Ytterligare information

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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=0.00550 (0.00331 - 0.00911), b=3.24 (3.10 - 3.38), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Trofisk nivå (Ref. 69278): 3.3 ±0.2 se; based on diet studies.

Resiliens (Ref. 120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (tm=3-14; tmax=14; Fec=8,000).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (52 of 100).

Price category (Ref. 80766): Very high.

Coregonus pidschian (Gmelin, 1789)