Table 5: Pairwise Poisson test and pairwise Wilcoxon-Mann-Whitney rank sum test at each temperature.

ComparisonTemperatureNPoisson testWilcoxon-Mann-Whitney rank sum test
Test statisticP-valueTest statisticP-value

C versus H2O 45× 20°481.729.0419*1.4580724 n.s.
C versus H2O 45× 40°480.260.3974 n.s.0.381.3516 n.s.
C versus H2O 45× 70°480.478.3162 n.s.1.548.0609 n.s.
C versus H2O 445× 100°480.609.2712 n.s.1.103.1351 n.s.

C versus As 45× 20°482.620.0044**2.363.0091**
C versus As 45× 40°482.599.0047**2.301.0107*
C versus As 45× 70°482.982.0014**4.076  .0001***
C versus As 45× 100°481.280.1002 n.s.1.484.0689 n.s.

H2O 45× versus As 45× 20°480.895.1855 n.s.0.667.2524 n.s.
H2O 45× versus As 45× 40°482.340.0096**1.942.0261*
H2O 45× versus As 45× 70°482.507.0061**2.374.0088**
H2O 45× versus As 45× 100°480.671.2510 n.s.0.300.3819 n.s.

C = control;  = sample size; n.s. = not significant.
*P  .05; **P  .01; ***P .001.