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Table 3 Radiocesium data information in five regions in Fukushima prefecture examined between May 2011 and March 2014 in the present study

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)
  1. *Total Cs = 134Cs + 137Cs.
  2. Total Cs was available between May 2011 and March 2014.
  3. 134Cs + 137Cs were available between April 2012 and March 2014.
  4. n/a: not applicable.