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Kamchatkan rainbow trout
The Kamchatkan rainbow trout (''Oncorhynchus mykiss mykiss'') is a subspecies of the rainbow trout, which is a fish in the Salmonidae family.〔(【引用サイトリンク】title=ITIS Standard Report Page: Oncorhynchus mykiss mykiss )〕 It is native to Russian Far East.〔(【引用サイトリンク】title=Kamchatka Rainbow Trout Fishing )〕 Its main range is on the Kamchatka Peninsula, and it has also been recorded from the Commander Islands east of Kamchatka, and sporadically in the Sea of Okhotsk, as far south as the mouth of the Amur River.
==Sea-run and freshwater ecotypes==
The Kamchatkan rainbow trout ("mikizha") comprises various ecological forms, including anadromous and resident freshwater forms and their intermediates.〔〔 S. D. Pavlov, A. V. Semenova, G. A. Rubtsova,K. I. Afanasiev (2011) (Analysis of microsatellite variation in the rainbow trout ''Parasalmo (Oncorhynchus) mykiss'' from Kamchatka ) ''Russian Journal of Genetics'' 47, 1198-1208.〕 Russian taxonomy has long attributed the rainbow trout to the genus ''Parasalmo'', and has further considered the Kamchatkan rainbow trout as composed of two distinct species, ''Parasalmo mykiss'' and ''Parasalmo penshinensis'', whose ranges overlap. ''P. mykiss'' is a resident freshwater and estuary form, whereas ''P. penshinensis'', "Kamchatkan salmon", is the sea-run, migrating anadromous form, which may grow to a length of 100 cm and 11-12 kg weight (as with the American steelhead).〔 ''P. penshinensis'' is considered critically endangered (CR) in the Red Book of Kamchatka.〔(Красная книга Камчатки. Том 1. Животные ) (Red Book of Kamchatka)〕〔 Modern research however suggests that the two forms represent the same species, showing no genetic isolation or differences.〔 (Микижа и … или камчатская семга? ) www.nexplorer.ru:news〕〔( Parasalmo penshinensis (Pallas, 1814) - камчатская семга ) Позвоночные животные России sevin.ru〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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