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Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA

Title on liner notes: Making rain for African ornithology. Within contents, click on Posters, then Programme for Poster J section: Conservation and human-related topics
By:
, , , ,
Edited by:
N.J. Adams, R.H. Slotow

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Abstract

Green Bay, Wisconsin is contaminated with polychlorinated biphenyls (PCBs) however, whether these contaminants affect reproduction in insectivorous birds is unknown. Tree Swallows, Tachycineta bicolor, are secondary cavity nesters that will nest in boxes and tolerate handling. Because Tree Swallows are aquatic insectivores, residues in their tissues are primarily indicative of contaminants in sediments. We studied swallows at two contaminated and two reference colonies in 1993, 1994, and 1995 in the Green Bay area. Swallows at the two contaminated sites had significantly higher PCB levels in eggs when compared to two reference sites. Eggs from clutches that contained dead embryos had higher PCB concentrations than eggs from clutches where all eggs hatched; there were no contaminant effects overall on reproduction, however. Twelve-day-old nestlings at the two contaminated sites accumulated significantly more PCBs than did nestlings at the reference sites demonstrating that PCB contamination came from the local area. The PCB congener profile in 12-day-old nestlings mirrored the congener profile in their food.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA
Year Published:
1998
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
Proceedings of the 22nd International Ornithological Congress, Durban 16-22 August 1998, Abstracts of oral presentations and posters
First page:
423
Last page:
424