As the International Council for the Exploration of the Sea (2005) noted, taken in context of marine mammal populations in general, sonar is not a major threat or a significant portion of the overall ocean noise budget. This has also been demonstrated by monitoring in areas where the Navy operates (Bassett et al. 2010; Baumann-Pickering et al. 2010; McDonald et al. 2006; Tyack et al. 2011).
In comparison to potential strandings or injury resulting from events associated with Navy activities, marine mammal strandings and injury from commercial vessel ship strike (Berman-Kowalewski et al. 2010), impacts from urban pollution (Murata et al. 2008), and annual fishery-related bycatch (Baird and Gorgone 2005; Forney and Kobayashi 2007; Saez et al. 2012) have been estimated to be orders of magnitude greater (hundreds of thousands of animals versus tens of animals) (Culik 2002; International Council for the Exploration of the Sea 2005; Read et al. 2006).
アフィブログの記事がソースとか・・・ (スコア:4, 興味深い)
クジラやイルカが集団で海岸に大量座礁するという事件は定期的に発生していますが、米海軍は米軍の潜水艦から発せられる大音響のソナー音がこの原因であると認めたそうです
'
そんな事はリンク先の記事 [huffingtonpost.com]のどちら [inhabitat.com]にも一言も書かれていない。実際の報告書 [aftteis.com]にも目を通してみたけれど、クジラやイルカの座礁の原因がソナー音とする事には懐疑的な記述になっている:
As the International Council for the Exploration of the Sea (2005) noted, taken in context of marine mammal populations in general, sonar is not a major threat or a significant portion of the overall ocean noise budget. This has also been demonstrated by monitoring in areas where the Navy operates (Bassett et al. 2010; Baumann-Pickering et al. 2010; McDonald et al. 2006; Tyack et al. 2011).
米海軍が原因と認めているのは2011年に訓練中の水中爆発に3頭のイルカが巻き込まれて死亡した事故だけ。商船や汚染の方がクジラやイルカの死亡や座礁に影響が大きいと結論付けている:
In comparison to potential strandings or injury resulting from events associated with Navy activities, marine mammal strandings and injury from commercial vessel ship strike (Berman-Kowalewski et al. 2010), impacts from urban pollution (Murata et al. 2008), and annual fishery-related bycatch (Baird and Gorgone 2005; Forney and Kobayashi 2007; Saez et al. 2012) have been estimated to be orders of magnitude greater (hundreds of thousands of animals versus tens of animals) (Culik 2002; International Council for the Exploration of the Sea 2005; Read et al. 2006).
しきい値 1: ふつう匿名は読まない
匿名補正 -1
Re: (スコア:0)
そりゃダイオキシン基地外 [srad.jp]のNOBAXがタレコミ人だからな。