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

Amur River Benthopelagic Habitat

This taxon is one of a number of benthopelagic species in the Amur River system. Benthopelagic river fish are found near the bottom of the water column, feeding on benthos and zooplankton

The persistence of mercury contamination in Amur River bottom sediments is a major issue, arising from historic cinnabar mining in the basin and poor waste management practises, especially in the communist Soviet era, where industrial development was placed ahead of sound conservation practises.

Other large benthopelagic river fish of the Amur Basin is the 200 cm yellowcheek (Elopichthys bambusa) and the 122 cm Mongolian redfin (Chanodichthys mongolicus)

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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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