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Table 1 Radiocesium data information for freshwater fishes examined between May 2011 and March 2014 in the present study

From: Radioactive cesium accumulation in freshwater fishes after the Fukushima nuclear accident

Species 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
Plecoglossus altivelis 74 68 n/a n/a 59 29 24 28 49 24 15 24
(ayu)   (91.9)     (49.2) (40.7) (47.5)   (49.0) (30.6) (49.0)
Salvelinus leucomaenis 44 41 n/a n/a 161 113 89 110 177 129 68 127
(white-spotted char)   (93.2)     (70.2) (55.3) (68.3)   (72.9) (38.4) (71.8)
Tribolodon hakonensis 46 43 n/a n/a 64 55 33 54 75 39 16 39
(Japanese dace)   (93.5)     (85.9) (51.6) (84.4)   (52.0) (21.3) (52.0)
Anguilla japonica 3 2 n/a n/a 3 3 3 3 2 2 2 2
(Japanese eel)   (66.7)     (100) (100) (100)   (100) (100) (100)
Carassius langsdorfii 18 2 n/a n/a 13 13 13 13 17 16 14 16
(Japanese silver crucian carp)   (11.1)     (100) (100) (100)   (94.1) (82.4) (94.1)
Carassius cuvieri 3 3 n/a n/a 1 1 1 1 2 2 2 2
(Japanese white crucian carp)   (100)     (100) (100) (100)   (100) (100) (100)
Cyprinus carpio 13 11 n/a n/a 23 19 16 19 17 16 10 16
(common carp)   (84.6)     (82.6) (69.6) (82.6)   (94.1) (58.8) (94.1)
Micropterus dolomieu 5 5 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a
(smallmouth bass)   (100)           
Misgurnus anguillicaudatu 4 4 n/a n/a 1 1 0 1 1 0 0 0
(weather loach)   (100)     (100) (0) (0)   (0) (0) (0)
Hemibarbus barbus 2 2 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a
(barbel steed)   (100)           
Oncorhynchus mykiss 1 0 n/a n/a 1 0 0 0 n/a n/a n/a n/a
(rainbow trout)   (0)     (0) (0) (0)     
Oncorhynchus nerka 6 6 n/a n/a 10 10 10 10 17 17 17 17
(sockeye salmon)   (100)     (100) (100) (100)   (100) (100) (100)
Oncorhynchus masou 69 63 n/a n/a 120 89 68 89 145 89 51 89
(masu salmon)   (91.3)     (74.2) (56.7) (74.2)   (61.4) (35.2) (61.4)
Hypomesus nipponensis 39 39 n/a n/a 29 26 25 26 13 11 6 11
(pond smelt)   (100)     (89.7) (86.2) (89.7)   (84.6) (46.2) (84.6)
  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.