Chemical

Concentration (C) in µg L-1

Time to 50% mortality (T50) in days

C x T50 product in µg L-1.days

n

Copper*

28

32.6

912

0.30

 

32

6.5

208

 

 

48

3.2

154

 

 

56

2.0

112

 

 

64

1.3

80

 

CdCl2**

3.2

292

935

0.60

 

5.6

58

325

 

 

10

38

375

 

 

18

11

203

 

 

32

6

181

 

 

56

2

105

 

Selenium*

158

3.3

514

1.03

 

800

0.7

567

 

 

1200

0.5

600

 

 

1600

0.4

600

 

 

2000

0.3

500

 

Zinc*

59

163

9617

0.47

 

125

32

4000

 

 

250

2

490

 

 

500

1.3

667

 
*Original data from Hoang et al. [64]
**Original data from Kooijman [65]
Table 3: Mortality of Daphnia magna induced by metallic elements or compounds (After Sanchez-Bayo [29]). Data also fit the equation C T50n.