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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 Phyletic dwarfism ： ウィキペディア英語版 Phyletic dwarfism Phyletic dwarfism is the the decrease in average size of animals of a species. There are a few circumstances that often lead to species doing this. Lack of predators of smaller creatures can allow smaller members of a species to survive. The lack of resources to sustain a large population of larger animals can pick off the largest specimens. Available resources being more beneficial for smaller creatures can also do so. These circumstances are common on islands making Insular dwarfism the most common form of phyletic dwarfism. Examples of this are the Channel Island fox, extinct dwarf elephants of Crete, and ''Brookesia micra'', a miniscule chameleon from Madagascar. It is possible that phyletic dwarfism may have also helped into bringing us the birds we see today from the giant dinosaurs we read about as kids. 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「Phyletic dwarfism」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.