Relative growth (g. g-1.d-1)       Mean ± S.D.

Arsenic ions con. mg/L               Days

 

3

9

15

0.010

1.06 ± 0.01

1.14 ± 0.05

1.18 ± 0.01

0.025

1.11 ± 0.03

1.25 ± 0.03

1.28 ± 0.04

0.050

1.23 ± 0.02

1.26 ± 0.04

1.30 ± 0.03

0.10

1.25 ± 0.01

1.30 ± 0.02

1.34 ± 0.06

Bio-concentration factor

0.010

185 ± 1.24

207 ± 1.45

226 ± 0.65

0.025

166 ± 0.54

199 ± 0.62

230 ± 1.32

0.050

226 ± 1.44

235 ± 1.11

302 ± 2.05

0.10

227 ± 0.37

249 ± 2.21

323 ± 1.25

S.D. = Standard deviation
The standard deviation has been obtained for n=3
Table 1: The effects relative growth and bio-concentration factor of E. crassipes at different arsenic ions concentration and exposure times.