thumbnail

Contaminant levels in colonial waterbirds from Green Bay and Lake Michigan, 1975-80

Environmental Monitoring and Assessment

By:
, , , and

Links

Abstract

Residues of organochlorine pesticides, polychlorinated biphenyls (PCBs), polybrominated biphenyls (PBBs), polychlorinated styrenes (PCSs), and mercury were measured in the eggs of 10 species of colonial waterbirds nesting in areas aroung Green Bay or Lake Michigan from 1975 to 1980. Residues also were measured in the carcasses and brains of black-crowned night-herons (Nycticorax nycticorax). The highest residues were of PCBs, DDE, mercury, and dieldrin; for some species, levels of these chemicals possibly were high enough to have caused reproductive effects. Other organochlorine pesticides were found at low levels. Only trace amounts of PCSs and PBBs were found. Eggs of herring gulls (Larus argentatus) collected in 1977 from an island in Lake Michigan contained an average of 100 ppm PCBs and 33 ppm DDE; this was the most- contaminated species. Cattle egrets (Bubulcus ibis), the only bird that is not a fish eater, contained only small quantities of DDE and mercury.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Contaminant levels in colonial waterbirds from Green Bay and Lake Michigan, 1975-80
Series title:
Environmental Monitoring and Assessment
Volume
5
Issue:
3
Year Published:
1985
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
223-236
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Monitoring and Assessment
First page:
223
Last page:
236
Number of Pages:
14