(a)

Measured Cu concentration (μg/L)	LT50 (h)	95% Confidence limits	Measured Cd concentration (μg/L)	LT50 (h)	95% Confidence limits	Measured Zn concentration (μg/L)	LT50 (h)	95% Confidence limits
37.78	76.69	27.15–216.57	49.41	29.89	14.44–61.9	779	260.33	743.38–1562.33
53.18	19.05	9.02–40.26	88.57	16.72	8.53–32.77	1010	100.63	63.30–159.99
126.96	11.86	6.06–23.24	282.91	10.87	5.87–20.12	2456	52.52	32.18–85.71
573.91	7.31	4.30–12.43	508.43	6.29	3.77–10.48	3213	17.59	11.88–26.05
842.65	4.68	2.82–7.77	893.52	3.04	2.12–4.28	4822	13.17	10.31–16.82