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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 Raptor conservation ： ウィキペディア英語版 Raptor conservation Raptor conservation concerns are threats affecting the population viability of birds of prey. Because of their hunting lifestyle, raptors face distinct conservation challenges. As top predators, they are important for healthy ecosystem functioning, and by protecting them many other species are safeguarded. Their extensive habitat requirements make regional conservation strategies necessary for protecting birds of prey. ==Pesticides== Because they are opportunistic carnivores, birds of prey are at high risk of secondary poisoning by eating organisms that have been killed or debilitated by pesticides. Raptors may be poisoned by legal, labeled use of pesticides or by illegal use. Cases can be identified as abuse if the chemical responsible is prohibited by law or not in use in the affected area. For example, in North America, Golden eagle poisonings are commonly found to be pesticide abuse cases traced to tainted sheep carcasses used to bait and kill coyotes. Common instances of labeled use are consumption of insects or worms that have been sprayed, and ingesting pesticide granules or treated seeds as food. In 1995 three thousand Swainson's hawks were killed in Argentina after they ate insects that had been sprayed.〔Mineau P, Fletcher MR, Glaser LC, Thomas NJ, Brassad C, Wilson LK, Elliot JE, Lyon LA, Henny CJ, Bollinger T, Porter SL. 1999. Poisoning of raptors with organophosphorous and carbamate pesticides with emphasis on Canada, U.S. and U.K. ''Journal of Raptor Research''. 33(1):1-37.〕 While most developed nations have adopted standards that reduce usage of chemicals with extended environmental persistence, the pesticides are still powerful and dangerous immediately after application. The United Kingdom owes its small proportion of labeled-use deaths to less toxic pesticides, whereas the United States has near equal amounts of labeled-use to illegal use fatalities. Use of non-granular and untreated seeds would reduce pesticide concentration and accessibility as a food source.〔 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「Raptor 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.