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Environmental contaminants in nonviable eggs of the endangered Mississippi Sandhill Crane (Grus canadensis pulla)

Environmental Monitoring and Assessment

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Abstract

Our objectives were to determine if concentrations of environmental pollutants and microbial contamination in nonviable eggs of the endangered Mississippi sandhill crane (Grus canadensis pulla) contributed to egg failure. Six eggs collected in 1990 and four in 1991 contained only background levels of organochlorine pesticides and polychlorinated biphenyls (PCBs), and tests for microbial contamination were all negative. Two eggs contained late dead embryos, but neither revealed obvious abnormalities. Three eggs contained potentially harmful concentrations (23, 39, 146 pg/g, wet mass) of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), based on 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TCDD-EQ) for combined compounds. Because of the scarcity of material suitable for laboratory examination and the endangered status of the crane, we recommend that nonviable eggs continue to be monitored for toxic pollutants.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Environmental contaminants in nonviable eggs of the endangered Mississippi Sandhill Crane (Grus canadensis pulla)
Series title:
Environmental Monitoring and Assessment
Volume
31
Issue:
3
Year Published:
1994
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
225-232
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Monitoring and Assessment
First page:
225
Last page:
232
Number of Pages:
8