Literaturdatenbank
Literaturdatenbank |
|
 |
|
de Solla, S. R., Bishop, C. A., Lickers, H., & Jock, K. (2001). Organochlorine pesticides, pcbs, dibenzodioxin, and furan concentrations in common snapping turtle eggs (chelydra serpentina serpentina) in akwesasne, mohawk territory, ontario, canada. Archives of Environmental Contamination and Toxicology, 40(3), 410–417.
Added by: Admin (14 Aug 2008 22:46:55 UTC) |
| Resource type: Journal Article BibTeX citation key: Solla2001 View all bibliographic details  |
Categories: General Keywords: Chelydra, Chelydra serpentina, Chelydridae, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises, Toxikologie = toxicology, Zeitigung = incubation Creators: Bishop, Jock, Lickers, de Solla Collection: Archives of Environmental Contamination and Toxicology |
Views: 5/587
Views index: 10% Popularity index: 2.5% |
| Abstract |
|
Subsamples of eight clutches of common snapping turtle eggs (Chelydra serpentina serpentina) were collected from four sites from the territory of the Mohawk Nation, Akwesasne, on the shore of the St. Lawrence River, Ontario, Canada during June 1998. Egg contents were analysed for organochlorine pesticides, polychlorinated biphenyls (PCBs), dibenzodioxins, and furans. The sites were 2 to 13 km downstream from PCB-contaminated landfill sites. Maximum concentrations of total PCBs in snapping turtle clutches were extremely high, and ranged from 2378.2 ng/g to 737683 ng/g (wet weight) and were among the highest recorded in any tissue of a free-ranging animal. Similarly, in a pooled sample of eggs from all four sites, the total concentrations of non-ortho PCBs (n=6 congeners) was also very high at 54.54 ng/g and the total dioxin and furan concentrations (n=11 congeners) was 85.8 ng/g. Total organochlorine pesticide levels varied from 28 to 2264 ng/g among the four sites. The levels of PCBs found in turtle eggs exceed concentrations associated with developmental problems and reduced hatching success in snapping turtles and other species and also exceed the Canadian tissue residue guidelines for toxic equivalency concentrations. The extremely high levels of organochlorine contaminants demonstrate the high degree of contamination in the environment in the Akwesasne area.
Added by: Admin |