VARIATION OF PCB MIXTURES IN EGGS OF BIRD S OF THE WADDEN SEA

Citation
M. Beyerbach et al., VARIATION OF PCB MIXTURES IN EGGS OF BIRD S OF THE WADDEN SEA, Journal fur Ornithologie, 134(3), 1993, pp. 325-334
Citations number
24
Language
TEDESCO
art.tipo
Article
Categorie Soggetti
Ornithology
Journal title
ISSN journal
0021-8375
Volume
134
Issue
3
Year of publication
1993
Pages
325 - 334
Database
ISI
SICI code
0021-8375(1993)134:3<325:VOPMIE>2.0.ZU;2-R
Abstract
The influence of location and year on the composition of PCB mixtures found in eggs was examined in the two wadden sea bird species Common T ern (Sterna hirundo) and Oyster-catcher (Haematopus ostralegus). By me ans of 45 PCB congeners the total concentration, the degree of metabol ism and the ring stability values were analysed. The highest PCB conce ntrations as well as the highest degree of metabolism were found in th e estuaries of the rivers Elbe and Weser and in the Deutsche Bucht. Th e degree of metabolism of both species increased linearly from 1987 to 1989. The total PCB concentration in the eggs of Common Terns were cl early higher than those found in the eggs of Oystercatchers but the mi xture was less metabolised. Furthermore, there are significant differe nces of the ring stability values between the two species. To assess t he PCB incrimination the degree of metabolism should be considered as well in a monitoring program.