Overview

Comprehensive Description

Biology

The land-locked form prefers low temperature streams, below 15°C. Young of the sea-run form enter the sea at 2 years of age and return to the rivers for spawning when they are 4 years or older. Found in summertime water temperature of 13-15° C (Ref. 12218). Carnivore, feeding on insects and plankton (Ref. 12218). Utilized fresh, smoked and frozen; can be broiled, microwaved and baked (Ref. 9988). Two forms: the land-locked form which reaches 35 cm, and the ocean form of 70 cm (Ref. 9137).
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Distribution

Northwest Pacific: Hokkaido, Japan and the northeastern Korean Peninsula through Sakhalin, the Kuril Islands to Kamchatka. Bering and Okhotsk seas (Ref. 4883).
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Physical Description

Size

Max. size

120 cm TL (male/unsexed; (Ref. 56527)); max. published weight: 15.0 kg (Ref. 56527); max. reported age: 9 years (Ref. 56527)
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Ecology

Habitat

Environment

benthopelagic; anadromous (Ref. 51243); freshwater; brackish; marine; depth range 0 - 50 m (Ref. 50550)
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Migration

Anadromous. Fish that ascend rivers to spawn, as salmon and hilsa do. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.
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Trophic Strategy

A carnivore that feeds on fish and crabs (Ref. 9137).
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial; gamefish: yes
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Disclaimer

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