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Sea trout : ウィキペディア英語版
Brown trout

| synonyms_ref = 〔(【引用サイトリンク】title=Synonyms of Salmo trutta Linnaeus, 1758 )
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The brown trout (''Salmo trutta'') is a European species of salmonid fish that has been widely introduced into suitable environments globally. It includes both purely freshwater populations, referred to ''Salmo trutta'' morpha ''fario'' and ''S. trutta'' morpha ''lacustris'', and anadromous forms known as the sea trout, ''S. trutta'' morpha ''trutta''. The latter migrates to the oceans for much of its life and returns to fresh water only to spawn.〔(''Trout Science'': "Science of Trout" )〕 Sea trout in the UK and Ireland have many regional names, including sewin (Wales), finnock (Scotland), peal (West Country), mort (North West England), and white trout (Ireland).
The lacustrine morph of brown trout is most usually potamodromous, migrating from lakes into rivers or streams to spawn, although evidence indicates stocks spawn on wind-swept shorelines of lakes. ''S. trutta'' morpha ''fario'' forms stream-resident populations, typically in alpine streams, but sometimes in larger rivers. Anadromous and nonanadromous morphs coexisting in the same river appear genetically identical.〔(''Lack of genetic differentiation between anadromous and resident sympatric brown trout (''Salmo trutta'') in a Normandy population.'' ). In ''Aquatic Living Resources'', Volume 18, N° 1, January–March 2005. Pages 65-69.〕 What determines whether or not they migrate remains unknown.
== Taxonomy ==

The scientific name of the brown trout is ''Salmo trutta''. The specific epithet ''trutta'' derives from the Latin ''trutta'', meaning, literally, "trout". Behnke (2007) relates that the brown trout was the first species of trout described in the 1758 edition of ''Systema Naturae'' by Swedish zoologist Carl Linnaeus. ''Systema Naturae'' established the system of binomial nomenclature for animals. ''Salmo trutta'' was used to describe anadromous or sea-run forms of brown trout. Linnaeus also described two other brown trout species in 1758. ''Salmo fario'' was used for riverine forms. ''Salmo lacustris'' was used for lake-dwelling forms.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Brown trout」の詳細全文を読む



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