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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 Astacus astacus ： ウィキペディア英語版 Astacus astacus ''Astacus astacus'', the European crayfish, noble crayfish or broad-fingered crayfish, is the most common species of crayfish in Europe, and a traditional food source. Like other true crayfish, ''Astacus astacus'' is restricted to fresh water, living only in unpolluted streams, rivers and lakes. It is found from France throughout Central Europe, to the Balkan peninsula, and north as far as parts of the British Isles, Scandinavia, and Eastern Europe. Males may grow up to 16 cm long, and females up to 12 cm.〔(【引用サイトリンク】title=Noble crayfish (''Astacus astacus'') )〕 ==Ecology== ''A. astacus'' is nocturnal and feeds on worms, aquatic insects, molluscs and plants, spending the day resting in a burrow. They become sexually mature after three to four years and a series of moults, and breed in October and November. Fertilised eggs are carried by the female, attached to her pleopods, until the following May, when they hatch and disperse. The main predators of ''A. astacus'', both as juveniles and adults, are mink, eels, perch, pike, otters, and muskrats.〔 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「Astacus astacus」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.