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Transfer and accumulation of organochlorines from black-crowned night-heron eggs to chicks

Environmental Toxicology and Chemistry

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Abstract

Eggs and sibling 1-, 3-, and 5-d-old chicks from seven black-crowned night-heron (Nycticorax nycticorax) broods were collected from Green Bay, Wisconsin, and analyzed for organochlorines. The concentration (A?g/g) of nine organochlo-rines either decreased (n = 7) or remained the same (n = 2) as the chicks grew older. In contrast, the total mass (A?g) of these nine organochlorines increased (n = 7) or remained the same (n = 2) as the chicks grew older. Accumulation rates of mass (A?g/d) between egg and 5-d-old chicks for each of the nine organochlorines were positive and varied from 0.2 A?g/d (p,pa??-DDT) to 42 A?g/d (PCBs). These results suggest that the loss of contaminant mass from eggs to chicks reported in some earlier studies was because the entire carcass was not analyzed (i.e., not including skin, gastrointestinal tract, etc.). These results also support the use of contaminant accumulation rates as an indicator of local contamination.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Transfer and accumulation of organochlorines from black-crowned night-heron eggs to chicks
Series title:
Environmental Toxicology and Chemistry
Volume
14
Issue:
3
Year Published:
1995
Language:
English
Contributing office(s):
Upper Midwest Environmental Sciences Center
Description:
pp. 533-536
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Toxicology and Chemistry
First page:
533
Last page:
536
Number of Pages:
4