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琵琶湖に異変？ 姿消す外来魚、駆除量は去年の４割：朝日新聞デジタル
https://www.asahi.com/articles/ASLCX3583LCXPTIL00D.html
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wakin (wakin@biwakodon.com)'s status on Sunday, 09-Dec-2018 19:54:34 JST 
wakin
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