ENVIRONMENTAL CHEMICALS IN EGGS OF INLAND AND WADDEN SEA BREEDING OYSTERCATCHERS (HAEMATOPUS-OSTRALEGUS)

Citation
Km. Exo et al., ENVIRONMENTAL CHEMICALS IN EGGS OF INLAND AND WADDEN SEA BREEDING OYSTERCATCHERS (HAEMATOPUS-OSTRALEGUS), Journal fur Ornithologie, 139(4), 1998, pp. 401-405
Citations number
20
Language
TEDESCO
art.tipo
Article
Categorie Soggetti
Ornithology
Journal title
ISSN journal
0021-8375
Volume
139
Issue
4
Year of publication
1998
Pages
401 - 405
Database
ISI
SICI code
0021-8375(1998)139:4<401:ECIEOI>2.0.ZU;2-H
Abstract
Due to the international importance of the Wadden Sea for waders and w aterfowl a long-term programme to monitor contamination of birds breed ing in the Wadden Sea has been established in the early 1980s. One of the species selected is the Oystercatcher. Comparatively little is kno wn about contamination of birds breeding inland. Therefore, we collect ed eight eggs of Oystercatchers breeding at the Lower Rhine (district of Kleve) and analysed their contamination with biocides (DDT, DDE, HC H) and industrial chemicals (PCB, HCB, Hg) in comparison to birds bree ding on the Wadden Sea islands of Griend (NL) and Mellum (D), where te n eggs were collected in 1994/95. We found distinctive differences bet ween inland and Wadden Sea breeding Oystercatchers. Eggs from the Lowe r Rhine had significantly higher residues of all organochlorines, wher eas concentration of mercury was significantly lower than in those fro m birds breeding on the Wadden Sea islands. In general, eggs collected on Griend held lower concentrations than those collected on Mellum is land, except pp'-DDT and Sigma PCB. The high PCB contamination in Oste rcatcher eggs from the Lower Rhine nowadays reflects the extreme pollu tion in the past. However, concentrations of the parameters studied ob viously had no embryotoxic effects in Oystercatchers.