John Wiley & Sons, Ltd.

Temporal and latitudinal trends of p,p'‐DDE in eggs and carcass of North American birds from 1980–2005

0
The use of DDT [1,1,1‐trichloro‐2,2‐bis (p‐chlorophenyl) ethane] in agriculture in the United States and Canada was prohibited in the early 1970's; however, it continued to be used restrictively in Mexico until 2000. Forty years later, p,p'‐DDE [(1,1‐dichloro‐2,2‐bis(p‐chlorophenyl) ethylene)], continues to be detected in eggs and bird carcasses in North America. DDE has been associated with reproductive failure of several avian species, primarily through eggshell thinning. To assess the temporal and latitudinal distribution of p,p'‐DDE in North America, we examined the DDE concentrations reported in bird tissues in the scientific literature published between 1980 and 2009. Overall, the majority of supported models suggested that DDE concentrations in birds were greatest in the upper mid‐latitudes (38°‐ 48°) than in other parts of North America. However, spatial trends of DDE seemed to be influenced by regions with great amounts of data, such as the Great Lakes area. Concentrations of p,p'‐DDE in eggs averaged 2.5, 3.2, and 29.5µg/g ww in 1980 and decreased to 1.64, 0.87, and 1.01 µg/g ww by the mid‐2000s for the central, eastern, and western North America regions, respectively. The results indicate that over time, all DDE residues observed in birds have decreased significantly in North America. This article is protected by copyright. All rights reserved

Customer comments

No comments were found for Temporal and latitudinal trends of p,p'‐DDE in eggs and carcass of North American birds from 1980–2005. Be the first to comment!