Overall there has been a significant reduction of hexachlorobenzene concentrations in seabird eggs during the time period from 1983 to 2003.
This reduction is apparent in herring gull, common guillemot and kittiwake and may also occur in other seabird species. The common eider had significant lower concentration of hexachlorobenzene than the other seabird species. The hexachlorobenzene concentration in the common eider was only about 1/10 of that found in other seabird species.
No regional differences were found in the data.
Levels of HCB in seabird egg
| Species | Species | Species | |
|---|---|---|---|
|
|
Levels of egg-HCB in Common guillemot. |
Levels of egg-HCB in Gannet. |
|
Levels of egg-HCB in Glaucouc gull. |
Levels of egg-HCB in Herring gull. |
Levels of egg-HCB in Kittiwake. |
|
Levels of egg-HCB in Puffin. |
Levels of egg-HCB in Razorbill. |
Levels of egg-HCB in Shag. |
