Table 1.
Concentrations of Total PCBs and DDE, ng g−1 adjusted wet weight (aww), in eggs of common (CT) and roseate (RT) terns collected from Ram Island and Bird Island in Buzzards Bay, MA, USA. All entries are in the form (geometric mean, gmn) arithmetic mean (mn) ± SD.
| Species | Sample Type | n | Year | Total PCBs | DDE | ||||
|---|---|---|---|---|---|---|---|---|---|
| (gmn) | mn | sd | (gmn) | mn | sd | ||||
| CT | Egg | 11 | 1972 | (14853) | 20286 | 11343 | (766) | 890 | 594 |
| CT | Pool | 4 | 1995 | (1867) | 2077 | 1204 | (113) | 115 | 22 |
| CT | Pool | 3 | 1996 | (1691) | 1776 | 687 | (125) | 133 | 49 |
| CT | Egg | 8 | 1998 | (1484) | 1567 | 533 | (132) | 139 | 43 |
| CT | Pool | 2 | 1998 | (1515) | 1525 | 240 | (134) | 135 | 15 |
| CT | Egg | 8 | 1999 | (2295) | 2501 | 1146 | (115) | 120 | 37 |
| CT | Pool | 1 | 1999 | 1646 | 110 | ||||
| CT | Egg | 16 | 2005 | (1293) | 1456 | 764 | (91) | 99 | 41 |
| RT | Egg | 1 | 1972 | 8246 | 597 | ||||
| RT | Egg | 8 | 1994 | (1506) | 1700 | 997 | (82) | 89 | 37 |
| RT | Pool | 1 | 1994 | 1152 | 90 | ||||
| RT | Egg | 16 | 1996 | (1370) | 1592 | 964 | (69) | 78 | 38 |
| RT | Pool | 3 | 1998 | (1494) | 1497 | 107 | (102) | 107 | 37 |
| RT | Egg | 16 | 1999 | (1286) | 1395 | 562 | (68) | 73 | 27 |
| RT | Pool | 3 | 1999 | (1671) | 1695 | 340 | (79) | 80 | 14 |
| RT | Egg | 16 | 2005 | (948) | 985 | 278 | (40) | 45 | 21 |
| RT | Pool | 2 | 2005 | (1215) | 1217 | 102 | (73) | 75 | 14 |