OverviewCanadian Wildlife Service project to monitor long-term spatial and temporal trends in contaminants in the eggs of colonial birds that nest on the Great Lakes. Focused on Herring Gulls. Initiated in 1974. Samples for stable isotopes and a variety of organic and inorganic pollutants. Source Agency: Canadian Wildlife Service, St. Mary's University, U.S. Fish and Wildlife Service ContactChip Weseloh, Wildlife Biologist Address Phone: 416-739-5846 Fax: 416-739-5845 |
| Name of dataset | Long-term Annual Monitoring of Spatial and Temporal Trends in Mercury Levels in Great Lakes Herring Gull Eggs, 1974-2008 |
| Geographic area | Great Lakes |
| State/Province | ON, MI, MN |
| Activity Category | Monitoring |
| Medium | birds |
| Focal species | Herring Gulls and other colonial waterbirds (cormorants, Common and Caspian Terns, Ring-billed and Great Black-backed Gulls, Black-crowned Night-herons) |
| Tissue Types | egg |
| Approximate size of dataset | 2000 |
| Positional data available? | yes |
| Start Date | 1974 |
| End Date | 2008 |
| Status | Ongoing |
| Frequency of sampling | annually |
| Collection season | spring |
| Collection Months | April-May |
| Current # Of Sampling Locations | 20 |
| Historic # Of Sampling Locations | 20 |
| Size of Sampling Area | Great Lakes |
| Individual or composite samples? | Both Individual and Composite |
| Ecosystem Focus | Great Lakes |
| Additional Info | Egg material from all years (and possibly prior to 1974) is archived in a tissue bank-- contact Chip Weseloh for more information. |
| Data Use | By permission only |
| Quality Assurance | yes |
| Data Format | Microsoft Excel, report(s) |
| Hg Measurements | THg |
| Hg Measurement Weight | ww |
| Ancillary Data | weight, length, stable isotopes, eggshell thickness, some fatty acids, the whole range of OC, PCBs, PCDDs and PCDFs, PBDEs |
| BRI has data? | no |
| Data downloadable on external website? | no |
| Other Databases | Wildspace |
| Comments | Egg material from all years (and possibly prior to 1974) archived in tissue bank-- contact Chip Weseloh for more information |
