United States (contiguous states) country information

Common names: Amarturpiaq, Amoktit, Atakak
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Ranges south to northern California but sometimes strays as far south to La Jolla, southern California (Ref. 2850). The largest producer in most years (Ref. 9988). Translocation from Maine to Maryland failed (Ref. 1998). Also Ref. 96339.
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/us.html
National Fisheries Authority: https://www.nmfs.gov
Occurrences: Occurrences Point map
Main Ref: Page, L.M. and B.M. Burr, 1991
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Salmoniformes (Salmons) > Salmonidae (Salmonids) > Salmoninae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Горбуша, 细鳞大麻哈鱼, سلمون وردي, ... more

Main reference

Page, L.M. and B.M. Burr. 1991. (Ref. 5723)
References | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 76.0 cm TL male/unsexed; (Ref. 9015); common length : 50.5 cm TL male/unsexed; (Ref. 12193); max. published weight: 6.8 kg (Ref. 27436); max. reported age: 3 years (Ref. 27547)

Length at first maturity
L_m 45.0, range 40 - 50 cm

Environment

Marine; freshwater; brackish; demersal; anadromous (Ref. 51243); depth range 0 - 250 m (Ref. 50550)

Climate / Range

Subtropical; ? - 21°C (Ref. 12741), preferred 3°C (Ref. 107945); 79°N - 29°N, 5°E - 114°W (Ref. 54683)

Distribution

Arctic and Pacific drainages from Mackenzie River delta, Northwest Territories, Canada to Sacramento River drainage, in California, USA; occasionally as far as La Jolla, southern California; also in northeast Asia (Ref. 5723). On Asia side, from North Korea to Jana and Lena drainages in Artic Russia. In Bering Sea north of about 40°N and from Bering Strait northeast to Point Barrow and northwest to Lena estuary (Ref. 59043). Introduced elsewhere. Occasionally hybridizes with Oncorhynchus keta producing fertile offspring (Ref. 28983).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 10-15; Anal spines: 0; Anal soft rays: 11 - 19; Vertebrae: 63 - 72. Distinguished by the presence of large black spots on the back and on both lobes of the caudal fin; the young have no parr marks (Ref. 27547). Body fusiform, streamlined, somewhat laterally compressed; moderately, deeper in breeding males (Ref. 1998). Mouth terminal, normally very little oblique but greatly deformed in breeding males, with lower jaw enlarged, turned up at tip, mouth unable to close (Ref. 1998). Adipose fin large; pelvic fins with axillary process (Ref. 27547). Fish in the sea are steel blue to blue-green on the back, silver on the sides and white on the belly; large oval spots present on the back, adipose fin and both lobes of the caudal fin (Ref. 27547). Breeding males become dark on the back, red with brownish green blotches on the sides; breeding females are similar but less distinctly colored (Ref. 27547). Differs from Oncorhynchus mykiss by having the following unique characters: anal fin with 11-15½ (usually 13½ ) branched rays; 177-240 scales in midlateral row; 26-33 gill rakers; large mature males with enormous hump; juveniles lacking parr marks; and lacking pink to red stripe on flank (Ref. 59043).

An anadromous species which inhabits ocean and coastal streams (Ref. 5723). Epipelagic (Ref. 58426). Pelagic at the sea. In freshwater, lives in Montane and Piedmont rivers with moderate to fast current and gravel bottom. Spawns in riffles or at head of riffles in shallow water with current up to 1.5 m/s, and clean coarse gravel (Ref. 59043). Spends 18 months at sea after which spawning migration to the natal river or stream occurs; but because the species is less certain of its homing and there is a certain degree of wandering, streams as much as 640 km from natal streams may be used (Ref. 1998, 27547). Upon emerging from the gravel, fry immediately move downstream and remain inshore for a few months before going out to sea. Fry may feed on nymphal and larval insects while in fresh water, but may not feed at all. In the sea, young feed on copepods and larvacean tunicates, its diet shifting to amphipods, euphausiids and fishes as the fish grows (Ref. 27547). Other food include ostracods, decapod larvae, cirripeds, tunicates, dipterous insects (Ref. 1998, 27547). Fry may be preyed upon by birds and mammals while adults by marine mammals and large fish (Ref. 1998). Mostly sold canned (Ref. 1998) but also utilized fresh, smoked, and frozen; also valued for caviar, especially in Japan; eaten steamed, fried, broiled, boiled, microwaved, and baked (Ref. 9988). The smallest of the true salmon (Ref. 12218).

IUCN Red List Status (Ref. 115185)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: highly commercial; aquaculture: commercial; gamefish: yes

More information

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Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.5 ±0.4 se; Based on diet studies.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (tm=2; tmax=3; Fec=800)

Vulnerability (Ref. 59153)
Moderate vulnerability (37 of 100)

Price category (Ref. 80766)
Low

Oncorhynchus gorbuscha (Walbaum, 1792)