Table 2.

Thallium and lead concentrations (mg/kg d.w.) in laid 1-day-old eggs from the BUK and CHE ponds, comparison to Tl and Pb levels in sediments of the BUK pond

	Laid 1-day-old eggs				Sediments
N	Tla [mg/kg s.m.]		Pbb [mg/kg s.m.]		Tl [mg/kg s.m.]	Pb [mg/kg s.m.]
	BUK	CHE	BUK	CHE	BUK	BUK
1	20.52	<0.005	3.49	0.59	8.423	5117.31
2	21.50	<0.005	2.09	0.57	6.740	4799.02
3	21.08	<0.005	2.05	0.39	7.479	4525.46
4	19.78	<0.005	2.90	0.35
5	8.96	<0.005	1.35	0.65
6	5.14	<0.005	3.14	0.79
7	5.20	<0.005	1.40	3.80
8	5.07	<0.005	4.62	0.77
9	4.87	<0.005	3.98	0.05
10	27.61	<0.005	1.80	1.61
x ± SD	13.97 ± 8.90	0.005	2.68 ± 1.12	0.96 ± 1.08	7.55 ± 0.84	4813.93 ± 296.21
range	4.89–27.61		1.35–4.62	0.05–3.80

Superscript letters represent ANOVA comparison of the BUK and CHE samples. For Tl in eggs F = 24.65; df = 1; p = 0.0001; for Pb in eggs F = 12.31; df = 1; p = 0.0025

N number of the sample, x ± SD mean value and standard deviation, <0.005 detection limits for Tl