Table 4.
Metal concentrations (ng/g = ppb on dry weight) in adult common eider and adult tufted puffin feathers by gender
| Feathers Common eider | Male n = 6 | Female n = 20 | χ2 (p) |
|---|---|---|---|
| Body weight (g) | 2260 ± 85.1 | 1670 ± 52.6 | 11.4 (0.0007) |
| Arsenic | 169 ± 46.7 139 |
128 ± 18.5 97.9 |
1.1 (NS) |
| Cadmium | 78.8 ± 5.2 77.9 |
80.0 ± 4.97 76.7 |
0.1 (NS) |
| Chromium | 89.9 ± 44.7 7.7 |
197 ± 52.9 54.3 |
1.1 (NS) |
| Lead | 743 ± 138 682 |
1070 ± 164 877 |
0.9 (NS) |
| Manganese | 1270 ± 397 1010 |
2040 ± 320 1630 |
1.5 (NS) |
| Mercury | 782 ± 166 566 |
857 ± 95.5 767 |
0.0 (NS) |
| Selenium | 665 ± 144 533 |
942 ± 104 804 |
1.3 (NS) |
|
| |||
| Tufted puffin | n = 25 | n = 13 | |
|
| |||
| Body weight (g) | 819 ± 11.4 | 738 ± 15.1 | 14.0 (0.0002) |
| Arsenic | 119 ± 34.3 5.9 |
164 ± 39.8 75.6 |
2.3 (NS) |
| Cadmium | 68.8 ± 14.9 39.7 |
101 ± 25.8 69.5 |
1.1 (NS) |
| Chromium | 1960 ± 336 1470 |
1550 ± 242 1390 |
0.0 (NS) |
| Lead | 1570 ± 505 339 |
750 ± 252 22.1 |
1.1 (NS) |
| Manganese | 694 ± 80.7 594 |
495 ± 68.8 430 |
2.0 (NS) |
| Mercury | 2270 ± 231 1850 |
3060 ± 350 2230 |
4.0 (0.05) |
| Selenium | 6600 ± 430 6280 |
6590 ± 643 5770 |
0.3 (NS) |
Note: The first row provides the arithmetic mean ± SE and the second row provides the geometric mean. The right-hand column compares differences using Kruskal–Wallis nonparametric one-way ANOVA, yielding chi square values and p-values. All numbers are rounded to three significant figures