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The gwyniad (''Coregonus pennantii'') is a freshwater whitefish native to Bala Lake () in northern Wales. The population is threatened by deteriorating water quality and by the ruffe, a fish introduced to the lake in the 1980s and now eating the eggs and fry of gwyniad. As a conservation measure, eggs of gwyniad were transferred to Llyn Arenig Fawr, a nearby lake, between 2003 and 2007.〔〔(Gwyniad ) BBC. Wales Nature & Outdoors (read April 2010)〕 The taxonomy of the genus ''Coregonus'' is disputed;〔 some authorities assign the gwyniad to the common whitefish (''Coregonus lavaretus'') complex,〔〔(【引用サイトリンク】title=Conservation )〕 whereas FishBase and the IUCN list it as a distinct species, ''C. pennantii''.〔 ==See also== *Powan *Schelly *Vendace 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「Gwyniad」の詳細全文を読む スポンサード リンク
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