Table 4.
Metal levels ppb (means and SE wet weight) in Horseshoe Crabs eggs from New Jersey collected 1995, 1999 and 2012. Analysis done on wet weight basis; results in ppb. Shown are the aritmetic means and standard error with the geometric means below.
| 1995 | 1999 | 2012 | ||
|---|---|---|---|---|
|
| ||||
| Fortescue | Fortescue | Fortescue | Kruskal-Wallis X2 | |
|
| ||||
| Number | 10 | 6 | 7 | |
| arsenic | 8517 ± 1139 | 3086 ± 198 | 9.0 (0.003) | |
| 8129 | 3048 | |||
| cadmium | 39 ± 13 | 31 ± 10 | 0.38 ± 0.15 | 13.7 (0.001) |
| 30 | 25 | 0 | ||
| chromium | 315 ± 29 | 66 ± 24 | 40 ± 4.90 | 15.4 (0.0005) |
| 295 | 46 | 38 | ||
| lead | 78 ± 14 | 64 ± 20 | 25 ± 5.04 | 7.8 (0.02) |
| 65 | 53 | 21 | ||
| manganese | 6975 ± 306 | 2672 ± 933 | 4457 ± 257 | 15.1 (0.0005) |
| 6918 | 2077 | 4410 | ||
| mercury | 15 ± 0 | 18 ± 6 | 1.03 ± 0.50 | 13.4 (0.001) |
| 15 | 13 | 0.37 | ||
| selenium | 2962 ± 68 | 1616 ± 290 | 996 ± 137 | 17.1 (0.0002) |
| 2955 | 1483 | 935 | ||