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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Largemouth yellowfish ： ウィキペディア英語版 Largemouth yellowfish The largemouth yellowfish or Vaal-Orange largemouth yellowfish (''Labeobarbus kimberleyensis'') is a ray-finned fish species in the family Cyprinidae. This large freshwater barb is found in southern Africa.〔Impson & Swarz (2007)〕 It has long been placed in ''Barbus'', the "wastebin genus" for barbs, by default; however, the species is increasingly being restored to related yellowfish genus ''Labeobarbus'' which seems a much more appropriate placement. It is probably hexaploid like the other yellowfish. ''L. kimberleyensis'' shares mtDNA haplotypes with the sympatric smallmouth yellowfish (''L. aeneus''), but is morphologically distinct. This typically indicates either species that have recently diverged, or hybrid introgression, or morphs that are mistakenly considered distinct species. The latter does not seem likely in this case, as the two differ much in size alone, but the actual cause for the genetic similarity remains unstudied.〔Impson & Swarz (2007), de Graaf ''et al.'' (2007)〕 ==Distribution and ecology== The largemouth yellowfish occurs in the Orange and Vaal Rivers and their larger tributaries (e.g. the Riet River) in Lesotho, Namibia and South Africa. In the latter country, it is found in Eastern Cape Province, Free State, Gauteng, Mpumalanga, North-West Province and Northern Cape Province.〔 ''L. kimberleyensis'' is predominantly found in deep pools (deeper than 2 metres/yards) of large rivers, as well as in the slow-moving water before weirs and river dams (e.g. Sterkfontein Dam). Abundant water weeds, overhaging riparian vegetation and other forms of plant cover seem to be essential for its well-being. They are predators of aquatic large invertebrates and small invertebrates; adults feed almost exclusively on fish. Spawning occurs in riffles during summer (around December/January); a large female can lay more than 60,000 eggs. They are slow-growing and long-lived and reach a total length of only after five years.〔 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「Largemouth yellowfish」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.