Life Cycle

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Distinct pairing (Ref. 205).
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Recorder
Susan M. Luna
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Migration

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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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Armi G. Torres
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Trophic Strategy

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A carnivore that feeds on fish and crabs (Ref. 9137).
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Pascualita Sa-a
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Biology

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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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Importance

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fisheries: commercial; aquaculture: experimental; gamefish: yes
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Salvelinus leucomaenis

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Salvelinus leucomaenis, the whitespotted char, is an East Asian trout in the genus Salvelinus, called iwana in Japanese. Both landlocked and ocean-run forms occur. The landlocked form typically grows up to 35 cm (1 ft 2 in), and prefers low-temperature streams. The seagoing fish typically grows to 70 cm (28 in) long. The largest reported specimen was 120 cm (3 ft 11 in) long and the oldest was nine years old.

Iwana is widely fished in Japan. Apart from Hokkaido in Japan, the species is found in northeast Korea and in Russia in Sakhalin, Kuril Islands and Kamchatka.

The kirikuchi char (Salvelinus leucomaenis japonicus or Salvelinus japonicus) is usually considered a subspecies of S. leucomaenis. Two other subspecies are also listed, S. l. imbrius and S. l. pluvius.

References

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Salvelinus leucomaenis: Brief Summary

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Salvelinus leucomaenis, the whitespotted char, is an East Asian trout in the genus Salvelinus, called iwana in Japanese. Both landlocked and ocean-run forms occur. The landlocked form typically grows up to 35 cm (1 ft 2 in), and prefers low-temperature streams. The seagoing fish typically grows to 70 cm (28 in) long. The largest reported specimen was 120 cm (3 ft 11 in) long and the oldest was nine years old.

Iwana is widely fished in Japan. Apart from Hokkaido in Japan, the species is found in northeast Korea and in Russia in Sakhalin, Kuril Islands and Kamchatka.

The kirikuchi char (Salvelinus leucomaenis japonicus or Salvelinus japonicus) is usually considered a subspecies of S. leucomaenis. Two other subspecies are also listed, S. l. imbrius and S. l. pluvius.

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