What was the influence of radiation on marine products in Fukushima?

Many people are worried about the influence of radiation on fish from Fukushima off-shore.

 

After the incident at Fukushima nuclear plants, some marine products like young lancefish recorded high level radioactive materials. The Japanese government prohibited to trade these marine products, and started the measurement of radioactive materials in marine products from Fukushima off-shore. The monitoring is still on going. The number of specimen reached more than hundred thousand.

 

Between April to June 2011, approximately 53% of measured marine products exceeded the reference value, 100 bq/kg, which the government set, while no fish from Fukushima off-shore recorded higher value than the reference value since April 2015. 

 

Radioactive materials are less likely to be found from fish inhabiting deep sea (such as flatfish, and codfish), wandering the sea (such as tuna fish and bonitos), and squids and octopus. The level of measured values among other fish too has decreased gradually. By now, 99.9% of marine products are under the detection limit value.  

 

Given the fact mentioned, fishing is restarted as a trial basis. The trial begun with three kinds marine products, like octopus, which did not record any radioactive materials even at the 2011. By January 2017, the number of spices allowed to fish increased to 97, given the research outcome in 2016. In March 2017, almost all marine products become tradable, and the target of trial fishing amended to “all marine products (except some prohibited spices)”.

 

 

 

無題

 

シノドスが発行する電子マガジン

 

・人文・社会科学から自然科学、カルチャーまで、各界の気鋭にじっくりインタビュー
・報道等で耳にする気になるテーマをやさしく解説
・専門家たちが提言「こうすれば●●は今よりもっとよくなるはず!」

・人類の英知を知り、学ぶ「知の巨人たち」
・初学者のためのブックリスト「学びなおしの5冊」

……etc.

https://synodos.jp/a-synodos

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シノドス国際社会動向研究所

vol.249+250 「善い生き方」とは何か?

・佐藤岳詩「善い生き方と徳――徳倫理学というアプローチ」
・井出草平「社会問題の構築と基礎研究――ひきこもりを事例に」
・大屋雄裕「学びなおしの5冊〈法〉」
・酒井泰斗「知の巨人たち――ニクラス・ルーマン」
・小林真理「「文化政策学」とはどんな学問か」