Table 4.

Variation in metals in eggs of eiders from the same nest

Nest #	Number of eggs	Metal	Mean±SE	SE	Min	Max
All	25	As	941±94.4		15.2	2,060
8 clutches		Cd	1.78±0.57		0.01	10.3
		Cr	345±62.2		79.0	1,690
		Pb	456±180		2.90	3,800
		Mn	1,500±132		109	2,830
		Hg	422±36.1		52.5	922
		Se	1,730±227		319	5,200
1	3	As	743±203		350	1,030
		Cd	0.77±0.76		0.01	2.30
		Cr	271±150		79.0	567
		Pb	37.0±4.00		33.0	45.0
		Mn	2,380±292		1,840	2,830
		Hg	518±91.6		366	683
		Se	2,120±594		1,430	3,310
2	2	As	1,400±124		1,280	1,530
		Cd	0.51±0.50		0.01	1.00
		Cr	308±114		194	422
		Pb	37.5±0.50		37.0	38.0
		Mn	1,170±564		610	1,740
		Hg	350±37.8		312	388
		Se	2,320±631		1,690	2,950
23	2	As	604±380		224	985
		Cd	3.36±3.35		0.01	6.70
		Cr	980±711		269	1,690
		Pb	98.5±0.50		98.0	99.0
		Mn	1,540±193		1,350	1,730
		Hg	261±6.75		254	268
		Se	1,460±357		1,100	1,810
24	3	As	856±95.5		667	976
		Cd	0.01±0.00		0.01	0.01
		Cr	319±96.9		216	513
		Pb	1,760±1,090		84.0	3,800
		Mn	2,171.08±147.51		1,994.23	2,460
		Hg	404±50.1		333	501
		Se	2,270±84.6		2,120	2,410
25	4	As	645±96.9		456	908
		Cd	2.87±1.59		0.01	5.50
		Cr	412±46.3		310	533
		Pb	1,120±496		33.0	2,300
		Mn	1,780±151		1,413	2,140
		Hg	451±18.4		398	480
		Se	3,190±825		1,770	5,200
33	3	As	905±469		15.2	1,610
		Cd	0.27±0.26		0.01	0.80
		Cr	284±94.2		176	472
		Pb	172±134		37.0	440
		Mn	808±360		109	1,310
		Hg	202±75.4		52.5	295
		Se	647±175		319	918
34	5	As	1,030±197		491	1,460
		Cd	3.42±1.97		0.01	10.3
		Cr	235±39.0		149	381
		Pb	134±32.7		73.0	240
		Mn	948±184		517	1,540
		Hg	612±109		390	922
		Se	1,050±125		702	1,40
35	3	As	1,420±322		1,000	2,060
		Cd	2.04±1.56		0.01	5.10
		Cr	197±27.8		147	243
		Pb	26.3±19.5		2.90	65.0
		Mn	1,370±130		1,140	1,580
		Hg	366±28.5		325	421
		Se	822±62.2		698	897