Lake

n

SL mean (mm) ± S.D.

SH mean (mm) ± S.D.

Shinji

45

18.16 ± 2.17

15.87 ± 1.76

Jusan

48

26.73 ± 2.51

23.90 ± 2.24

Ogawara

48

22.34 ± 1.43

20.42 ± 1.31

Abashiri

47

24.28 ± 1.41

22.46 ± 1.27

Total

188

22.94 ± 3.66

20.73 ± 3.44