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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 Labeobarbus johnstonii ： ウィキペディア英語版 Labeobarbus johnstonii ''Labeobarbus johnstonii'' is a ray-finned fish species in the family Cyprinidae. It has long been placed in ''Barbus'', the "wastebin genus" for barbs, by default, and this is still being done by the IUCN. However, the species is increasingly being restored to related yellowfish genus ''Labeobarbus'' which seems a much more appropriate placement. It is presumably hexaploid like the other yellowfish. The supposed subspecies ''latirostris'' of its relative ''L. intermedius'' is actually misidentified ''L. johnstonii''.〔Vreven ''et al.'' (2006), de Graaf ''et al.'' (2007)〕 Its natural habitats are rivers and freshwater lakes. It is found in Lake Malawi, the Shire River and their larger tributaries in Malawi, Mozambique and Tanzania.〔Vreven ''et al.'' (2006)〕 Like other yellowfish, ''L. johnstonii'' is a large species. It can grow to more than standard length and over in weight. This freshwater fish is found in small group in all sorts of underwater habitat. They are omnivores, but adult fish like to eat smaller fishes in particular. For spawning, they migrate towards the rivers' headwaters in the rainy season. The lake populations often do not return from their spawning grounds until the dry season has started.〔 This species is of commercial significance. It is collected and traded for aquaria, typically when young, but it must be remembered that this is only a fish for the largest of tanks if it shall thrive. The spawning adults are fished for local food and for trade. Although ''L. johnstonii'' is widespread and not considered a threatened species by the IUCN, catching the fishes when they migrate to spawn and not when they return as well as the use of fish poisons (which is illegal but still practiced in places) is probably depleting its numbers faster than they can recover.〔 ==Footnotes== 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「Labeobarbus johnstonii」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.