(a)

Time (hour)	LC50 (μg/L)  for Cu	95% Confidence limits	LC50 (μg/L) for Cd	95% Confidence limits	LC50 (μg/L) for Zn	95% Confidence limits	LC50 (μg/L) for Pb	95% Confidence limits
24	82.17	39.02–141.5	125.18	77.69–180.97	2655.27	2148.19–3282.04	6582.57	4920.11–8806.77
48	38.84	19.3–55.82	50.73	21.7–78.3	1682.70	1365.77–2073.17	2885.86	7919.06–4339.71
72	30.67	10.07–42.46	28.76	0.49–47.82	1475.74	1204.16–1808.58	1491.11	991.86–2241.66
96	25.2	4.51–35.75	13.15	NA	1189.83	955.19–1482.13	526.19	307.06–901.72