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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 Salmon conservation ： ウィキペディア英語版 Salmon conservation The survival of wild salmon relies heavily on them having suitable habitat for spawning and rearing of their young.〔NOAA〕 This habitat is the main concern for conservationists everywhere. Salmon habitat can be degraded by many different factors including land development, timber harvest, or resource extraction.〔Rahr, 2005〕 These threats bring about the traditional methods of protecting the salmon, but a new movement aims to protect the habitats before they require intervention. == History of salmon decline == Wild salmon in California, Oregon, Washington, Idaho, and southern British Columbia have been on a 160+ year downward trend and are now at very low levels.〔Lackey, Lach, and Duncan, 2006〕 Efforts to reverse the decline have been extensive and expensive, but have not met with much success. 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「Salmon conservation」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.