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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 Common mudpuppy ： ウィキペディア英語版 Common mudpuppy The common mudpuppy (''Necturus maculosus'') is a species of salamander in the genus ''Necturus''.〔 They live an entirely aquatic lifestyle in the eastern part of North America in lakes, rivers, and ponds. They go through paedomorphosis and retain their external gills.〔 Because skin and lung respiration alone is not sufficient for gas exchange, mudpuppies must rely on external gills as their primary means of gas exchange.〔 They are usually a rusty brown color〔 and can grow to an average length of .〔 Mudpuppies are nocturnal creatures, and only come out during the day if the water in which they live is murky.〔 Their diets consist of almost anything they can get in their mouths, including insects, earthworms, mollusks, and annelids.〔 Once a female mudpuppy reaches sexual maturity, at six years of age, she can lay an average of 60 eggs.〔 In the wild, the average lifespan of a mudpuppy is 11 years.〔 〔 ==Appearance== Mudpuppies can be a rusty brown color with gray and black and usually have blackish-blue spots, but some albino adults have been reported in Arkansas.〔 In clear, light water, their skin gets darker, likewise in darker water, their skin gets lighter in color.〔 At sexual maturity, mudpuppies can be long and continue to grow to an average length of , though specimens up to have been reported.〔 Their external gills resemble ostrich plumes and their size depends on the oxygen levels present in the water. In stagnant water, mudpuppies have larger gills, whereas in running streams where oxygen is more prevalent, they have smaller gills.〔 The distal portions of the gills are very filamentous and contain many capillaries.〔 Mudpuppies also have small, flattened limbs that can be used for slowly walking on the bottoms of streams or ponds, or they can be flattened against the body during short swimming spurts.〔 They have mucous glands which provide a slimy protective coating, and granular glands that secrete poison used as defense against predators.〔 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「Common mudpuppy」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.