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).
  • Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino 1984 The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text). (Ref. 559)
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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).
  • Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino 1984 The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text). (Ref. 559)
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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)
  • Fadeev, N.S. 2005 Guide to biology and fisheries of fishes of the North Pacific Ocean. Vladivostok, TINRO-Center. 366 p. (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)
  • Fedorov, V.V., I.A. Chereshnev, M.V. Nazarkin, A.V. Shestakov and V.V. Volobuev 2003 Catalog of marine and freswater fishes of the northern part of the Sea of Okhotsk. Vladivostok: Dalnauka, 2003. 204 p. (Ref. 50550)
  • Riede, K. 2004 Global register of migratory species - from global to regional scales. Final Report of the R&D-Projekt 808 05 081. Federal Agency for Nature Conservation, Bonn, Germany. 329 p. (Ref. 51243)
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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.
  • Riede, K. 2004 Global register of migratory species - from global to regional scales. Final Report of the R&D-Projekt 808 05 081. Federal Agency for Nature Conservation, Bonn, Germany. 329 p. (Ref. 51243)
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Trophic Strategy

A carnivore that feeds on fish and crabs (Ref. 9137).
  • Tokranov, A.M. and V.V. Maksimenkov 1995 Feeding habits of predatory fishes in the Bol'shaya River estuary (West Kamchatka). J. Ichthyol. 35(9):102-112. (Ref. 12531)
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial; gamefish: yes
  • International Game Fish Association 1991 World record game fishes. International Game Fish Association, Florida, USA. (Ref. 4699)
  • Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott 1991 World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537)
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