From: Radioactive cesium accumulation in freshwater fishes after the Fukushima nuclear accident
Region | Number of analysed betweeen May 2011 and March 2012 | Number of data above detection limit betweeen May 2011 and March 2012 (Ratio of detectable (%)) | Number of analysed betweeen April 2012 and March 2013 | Number of data above detection limit betweeen April 2012 and March 2013 (Ratio of detectable (%)) | Number of analysed betweeen April 2013 and March 2014 | Number of data above detection limit betweeen April 2013 and March 2014 (Ratio of detectable (%)) | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Cs* | 134Cs | 137Cs | Total Cs* | 134Cs | 137Cs | Total Cs* | 134Cs | 137Cs | ||||
Sousou region | 10 | 10 | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
(100) | ||||||||||||
Iwaki region | 31 | 26 | n/a | n/a | 9 | 7 | 3 | 4 | 7 | 2 | 1 | 2 |
(83.9) | (77.8) | (33.3) | (44.4) | (28.6) | (14.3) | (28.6) | ||||||
Fukushima region | 37 | 37 | n/a | n/a | 58 | 57 | 57 | 57 | 65 | 63 | 56 | 63 |
(100) | (98.3) | (98.3) | (98.3) | (96.9) | (86.1) | (96.9) | ||||||
Koriyama region | 43 | 42 | n/a | n/a | 70 | 57 | 43 | 57 | 83 | 48 | 26 | 48 |
(97.7) | (81.4) | (61.4) | (81.4) | (57.8) | (31.3) | (57.8) | ||||||
Aizu region | 210 | 188 | n/a | n/a | 541 | 369 | 278 | 364 | 358 | 230 | 117 | 228 |
(89.5) | (68.2) | (51.3) | (67.3) | (64.2) | (32.7) | (63.7) |