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Organochlorine residues in young herons from the upper Mississippi River-1976

Pesticides Monitoring Journal

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Abstract

Chicks of great blue herons (Ardea herodias) from four heronaries located near South St. Paul, Royalton, and Wabasha, Minnesota, and La Crosse, Wisconsin, were analyzed for organochlorines, Highest mean wet-weight concentrations, 6.43 ppm PCBs. 1.31 ppm DDE, and 1.90 ppm sigma DDT, were found in the South St. Paul chicks. Among chicks from the other three heronries, most levels were similar, but were significantly lower than levels in South St. Paul chicks. Lowest mean organochlorine levels, 0.37 ppm DDE, 0.38 ppm sigma DDT, and 0.22 ppm PCBs, were found in chicks from Royalton. All birds from South St. Paul and La Crosse contained residues of DDT and TDE whereas only one of the 10 birds from Royalton contained DDT and one contained TDE residues. Five of the 12 birds from Wabasha contained DDT; eight contained TDE. Except for PCB residues in La Crosse heron chicks, the rate of organochlorine residue accumulation in the birds was generally less than the rate of dilution caused by growth.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Organochlorine residues in young herons from the upper Mississippi River-1976
Series title:
Pesticides Monitoring Journal
Volume
13
Issue:
3
Year Published:
1979
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
115-119
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
115
Last page:
119
Number of Pages:
5