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Mercury, cadmium, lead, and selenium in three waterbird species nesting in Galveston Bay, Texas, USA

Colonial Waterbirds

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Abstract

Heavy metal and selenium concentrations were determined in Olivaceous Cormorants (Phalacrocorax olivaceus ), Laughing gulls (Larus atricilla ), and Black Skimmers (Rynchops niger ) nesting in Galveston Bay, Texas, during 1980-81. Lead was detected at low levels in a small proportion of the liver samples. Mercury was present in all livers sampled, the highest levels being found in cormorants (7.8 ppm) and skimmers (16 ppm). Concentrations were considerably lower than those reported in birds from mercury-contaminated lakes in northern United States and Canada. Cadmium and selenium were detected in 93 and 95% of the kidneys. Cadmium was highest in gulls and skimmers with a maximum value of 16 ppm. Selenium levels were similar among species except for higher concentrations in gulls collected in 1981.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mercury, cadmium, lead, and selenium in three waterbird species nesting in Galveston Bay, Texas, USA
Series title:
Colonial Waterbirds
Volume
9
Issue:
1
Year Published:
1986
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
90-94
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Colonial Waterbirds
First page:
90
Last page:
94
Number of Pages:
5