翻訳と辞書 Words near each other ・ Lumbrical ・ Lumbricales ・ Lumbricalis ・ Lumbricals of the foot ・ Lumbricals of the hand ・ Lumbricidae ・ Lumbriculidae ・ Lumbriculus ・ Lumbriculus ambiguus ・ Lumbriculus genitosetosus ・ Lumbriculus illex ・ Lumbriculus japonicus ・ Lumbriculus kareliensis ・ Lumbriculus mukoensis ・ Lumbriculus multiatriatus ・ Lumbriculus variegatus ・ Lumbricus ・ Lumbricus badensis ・ Lumbricus rubellus ・ Lumbricus terrestris ・ Lumbrineris latreilli ・ Lumbrokinase ・ Lumbu language ・ Lumbung ・ Lumbwa ・ Lumby ・ Lumby (surname) ・ Lumby Junction, British Columbia ・ Lumby, British Columbia ・ Lumby, Denmark Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Lumbriculus variegatus ： ウィキペディア英語版 Lumbriculus variegatus ''Lumbriculus variegatus'', also known as the blackworm or California blackworm, is a species of worm inhabiting North America and Europe. It lives in shallow-water marshes, ponds, and swamps, feeding on microorganisms and organic material. An adult individual has approximately 150 to 250 segments, each of which has the ability to regenerate into a new individual when separated from the rest of the animal. In most populations, this is the primary mode of reproduction, and sexually mature individuals are exceedingly rare; in large areas (including Asia, most of North America and the greater part of Europe) sexually mature individuals have never been found. The name ''blackworm'' is given to at least three distinct species of worm that are identical in appearance and were once considered a single species.〔(Press Release, University of Gothenburg, April 22, 2009 )〕〔(Genetic variation in the popular lab worm Lumbriculus variegatus (Annelida: Clitellata: Lumbriculidae) reveals cryptic speciation, Daniel R. Gustafssona, David A. Priceb and Christer Erséus, University of Gothenburg )〕 == Characteristics == Among the characteristics of the genus are a green pigmentation of the anterior end, its two-pointed setae, and its curious reflex escape mechanisms. When touched, ''L. variegatus'' will attempt to escape, either by swimming in a helical ("cork-screw") fashion, or by reversing its body. The escape pattern used depends on where the worm is touched: anterior touch elicits body reversal, whereas posterior touch triggers helical swimming. ''L. variegatus'' has quick reflexes, and uses its photoreceptors to detect shadows and movement, both used to escape threats. The posterior end lifts out of the water and forms a right angle. It is then exposed to air and is used to exchange oxygen and carbon dioxide, although this exposes its posterior to its enemies. If the photoreceptors detect a shadow or movement, the posterior rapidly shortens in response to a threat. 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「Lumbriculus variegatus」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.