Table 3.
Mean age, in years, of the females and the males used to estimate the sex difference in whole-fish PCB concentrations
| Species | Population | Mean age of females | Mean age of males | Reference |
|---|---|---|---|---|
| Walleye | South Manistique Lake | 5.7 (0.3) | 5.1 (0.3) | 7 |
| Lake trout | Lake Ontario | 5.5 (0.1) | 5.8 (0.1) | 8 |
| Coho salmon | Lake Michigan | 2.0 (0.0) | 2.0 (0.0) | 3 |
| Burbot | Lake Erie | 9.8 (0.9) | 9.5 (1.0) | 22 |
| Burbot | Great Slave Lake | 11.0 (0.7) | 11.5 (0.7) | 24 |
| Sea lamprey | Lake Huron | 1.0 (0.0) | 1.0 (0.0) | 23 |
| Cisco | Lake Superior | 7.0 (0.0) | 7.0 (0.0) | 25 |
| Lake whitefish | Lake Huron | 10.4 (0.4) | 10.9 (0.4) | 26 |
| Summer flounder | New Jersey coast | 3.7 (0.2) | 4.2 (0.2) | 27 |
Standard error of the mean enclosed within parentheses
For sea lamprey, age refers to the presumed number of years that the sea lamprey lived in the lake feeding on the blood of other fish before ascending the river to spawn