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 arctic drainages from Point Barrow eastward (Ref. 1998, 27547). Primarily used in subsistence fisheries (Ref. 27547) but Winslow and Roguski 1970 (Ref. 28223) report a small commercial fishery on the Colville River Delta. Furniss 1974 (Ref. 28860) report that it is caught in abundance during August at Barter I. Also Ref. 5723, 6876, 10280, 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

Омуль, 秋(凹目)白鲑, Pollan, ... more

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | 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: Pallas.

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

marien; zoet water; brak water; anadroom (Ref. 51243). Polar; 84°N - 49°N, 8°W - 95°W

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Europe: All drainages (except Ob and Baikal) of Arctic Ocean in Eurasia from Mezen eastward. North America: Cape Barrow to Coronation Bay. Introduced in many localities of former USSR, but not established (Ref. 59043).

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 65.0 cm SL mannelijk / geslacht onbekend; (Ref. 59043); common length : 47.0 cm TL mannelijk / geslacht onbekend; (Ref. 12193); max. gerapporteerde leeftijd: 12 Jaren (Ref. 59043)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 10 - 12; Anale stekels: 0; Anale zachte stralen: 12 - 14; Wervels: 64 - 67. Distinguished by the pale or colorless pelvic fins, a terminal mouth and the presence of 41 to 48 gill rakers on the 1st gill arch (Ref. 27547). Dorsal fairly high and slightly falcate; pelvic with axillary process (Ref. 27547). Brown to dark greenish above fading to silvery on sides and belly; fins pale (Ref. 27547).

Occurs in brackish waters (20-22 ppt) of coastal lagoons and mouths of rivers and bays (Ref. 4779). Mostly in larger lowland rivers (Ref. 59043). Nerito-pelagic (Ref. 58426). Feeds on small crustaceans, insects, small fishes (Ref. 28219, 28857), worms and clams (Ref. 58426). At sea, feeds on larger crustaceans and small fish (Ref. 59043). No feeding occurs during the upstream migration (Ref. 4779). Lives 10 -12 years, rarely up to 20 (Ref. 59043). Enters rivers in shoals to spawn (Ref. 4779). Spends 6-8 years at sea before maturing and returning to rivers in June - July, to spawn in September - October of same year. A second run in autumn; those fishes remain a year in rivers before spawning. Moves far upstream, sometimes our to 1500 km. Spawns in shallow tributaries with some current in well oxygenated water over gravel bottom. Individual females do not spawn every year; spawns only 2-3 times during entire life. After spawning adults return directly to sea. Embryonic development lasts up to 7 months. Alevins migrate downstream in May - June (Ref. 59043). Collected by fyke nets (Ref. 4526). An important commercial species, but catches and abundance markedly reduced in last years (Ref. 59043).

Levenscyclus en paargedrag Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven

Mature adults migrate upstream in the summer and may cover as much as 1,000 km (Ref. 28219) to spawn over gravel in fairly swift water. After spawning, adults return downstream. Young probably hatch in the spring and descend rivers into estuaries (Ref. 27547). Coregonus autumnalis do not breed yearly (Ref. 28219, 28220).

Hoofdreferentie Upload your references | Referenties | Coördinator | Medewerkers

Wheeler, A., 1992. A list of the common and scientific names of fishes of the British Isles. J. Fish Biol. 41(suppl.A):1-37. (Ref. 5204)

Status op de Rode Lijst van het IUCN (Ref. 130435)

Niet bedreigd (LC) ; Date assessed: 01 January 2008

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

Visserij: commercieel

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Estimates based on models

Preferred temperature (Ref. 115969): -1.7 - 3.4, mean -0.4 (based on 988 cells).

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00468 (0.00405 - 0.00540), b=3.22 (3.18 - 3.26), in cm Total Length, based on LWR estimates for this species (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.7 ±0.2 se; based on diet studies.

Weerstandsvermogen (Ref. 120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (tm=6; Fec=2,000).

Prior r = 0.40, 95% CL = 0.26 - 0.60, Based on 1 data-limited stock assessment.

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

Prijsklasse (Ref. 80766): Very high.

Coregonus autumnalis (Pallas, 1776)