Research Article
Toxicity of Metals to a Freshwater Snail, Melanoides tuberculata
Table 2
Median lethal concentrations (LC50) for M. tuberculata at different exposure times for Cu, Cd, Zn, Pb, Ni, Fe, Al, and Mn.
| | Time (hour) | LC50 (mg L−1) | 95% Confidence limits |
| | Cu | | | 24
48
72
96 | 0.82
0.39
0.21
0.14 | 0.49–4.21
0.23–0.88
0.12–0.33
0.09–0.20 |
| | Cd | | | 24
48
72
96 | 85.03
11.85
5.24
1.49 | 13.94–518.57
2.70–51.99
0.96–28.43
0.34–6.53 |
| | Zn | | | 24
48
72
96 | 33.97
13.15
4.73
3.90 | 21.59–65.31
6.93–26.06
2.28–8.10
1.81–6.67 |
| | Pb | | | 24
48
72
96 | 17.39
10.99
8.57
6.82 | 12.06–29.47
6.04–19.68
4.37–14.79
2.89–12.67 |
| | Ni | | | 24
48
72
96 | 68.35
36.46
15.04
8.46 | 48.18–102.23
20.76–70.91
5.23–28.97
3.53–14.02 |
| | Fe | | | 24
48
72
96 | 42.12
21.78
13.29
8.49 | 25.74–133.99
10.52–88.85
4.09–29.47
1.58–15.25 |
| | Al | | | 24
48
72
96 | 880.78
306.89
130.22
68.23 | 553.91–2147.55
184.29–487.20
35.51–226.38
2.24–123.87 |
| | Mn | | | 24
48
72
96 | 194.52
120.43
78.35
45.59 | 112.85–335.27
58.08–249.72
36.20–169.56
20.17–103.04 |
|
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