Table 2 Radiocecium concentrations (exceeding the detection limit) in freshwater fishes examined between May 2011 and March 2014 in the present study

Plecoglossus altivelis

530 ± 822

n/a

n/a

60.9 ± 61.0

29.1 ± 25.2

37.9 ± 35.5

50.9 ± 42.3

22.8 ± 12.4

36.6 ± 28.4

(ayu)

7.7-4400

8.5-280

8.4-116

7.58-164

7.9-200

11.8-61.3

7.9-140

Salvelinus leucomaenis

154 ± 145

n/a

n/a

94.2 ± 127

46.3 ± 54.2

59.3 ± 76.1

49.6 ± 75.1

26.2 ± 29.6

36.1 ± 50.4

(white-spotted char)

6.4-590

7.4-840

7.7-350

7.4-490

6.5-600

7.4-194

6.5-403

Tribolodon hakonensis

207 ± 405

n/a

n/a

75.4 ± 103

45.9 ± 46.5

48.3 ± 61.0

48.1 ± 78.1

32.2 ± 33.3

34.8 ± 51.5

(Japanese dace)

11-2500

7.8-420

8.8-171

7.8-253

7.1-390

7.9-126

7.1-261

Anguilla japonica

129 ± 21

n/a

n/a

191 ± 179

74.7 ± 69.8

114 ± 106

(Japanese eel)

114-143

44-390

16.4-152

27.5-82.3

58-110

21.4-34.9

36.2-78.6

Carassius langsdorfii

86 ± 40

n/a

n/a

94.7 ± 91.7

37.0 ± 38.6

57.3 ± 52.2

94.5 ± 91.0

34.8 ± 30.1

64.3 ± 61.7

(Japanese silver crucian carp)

43-188

24-310

8.6-128

11.2-177

8.9-310

8.9-112

8.9-205

Carassius cuvieri

29 ± 202

n/a

n/a

170

64.1

103

(Japanese white crucian carp)

88-98

67-120

20.6-38.6

45.9-85.3

Cyprinus carpio

80 ± 46

n/a

n/a

66.9 ± 66.7

31.8 ± 27.8

40.0 ± 39.1

49.3 ± 36.2

22.0 ± 10.3

35.8 ± 24.1

(common carp)

15-155

13-280

9.4-114

9.9-166

9.6-110

7.8-37.7

9.6-76.6

Micropterus dolomieu

118 ± 130

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

(smallmouth bass)

10.2-330

Misgurnus anguillicaudatu

49.7 ± 25.6

n/a

n/a

9.7

nd

nd

nd

nd

nd

(weather loach)

21.6-83

Hemibarbus barbus

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

(barbel steed)

83-110

Oncorhynchus mykiss

nd

n/a

n/a

nd

nd

nd

n/a

n/a

n/a

(rainbow trout)

Oncorhynchus nerka

106 ± 42.1

n/a

n/a

136 ± 32.2

51.1 ± 15.7

85.5 ± 18.7

112 ± 27.6

34.1 ± 10.8

77.6 ± 17.7

(sockeye salmon)

36-158

89-200

34.2-82

55.2-120

81-170

21.8-55.5

54.4-110

Oncorhynchus masou

586 ± 2360

n/a

n/a

116 ± 199

59.2 ± 92.0

71 ± 117

70 ± 101

35.9 ± 36.1

49.4 ± 68.4

(masu salmon)

6-18700

7.1-1430

8.9-610

7.1-820

6.8-570

7.7-187

6.8-378

Hypomesus nipponensis

307 ± 167

n/a

n/a

48.2 ± 18.2

18.7 ± 6.1

30.2 ± 12.2

32.7 ± 19.2

16.7 ± 6.2

23.6 ± 10.0

(pond smelt)

27-870

9.9-76

8.5-31.8

9.9-46.9

14-76

11.7-28.6

14.4-47.6