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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 New Zealand grayling ： ウィキペディア英語版 New Zealand grayling The New Zealand grayling, ''Prototroctes oxyrhynchus'', is an extinct smelt of the genus ''Prototroctes'', which was found only in lowland rivers and streams of New Zealand. They were an amphidromous species—spawning in freshwater streams and developing to maturity in saltwater. Their length was between 20 and 40 cm. Though abundant through the early colonial period, by the 1860s their population began to decline. The last known specimen was caught in the late 1920s to early 1930s. Deforestation and competition from feral trout may have contributed to the New Zealand grayling's extinction.〔 ==References== 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「New Zealand grayling」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.