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Contaminant concentrations in manatees in Florida

June 16, 2010

The status of the endangered manatee (Trichehus manatus) in relation to organochlorine pesticides, polychlorinated biphenyls, mercury, lead, cadmium, copper, iron, and selenium was investigated in Florida from 1977 to 1981. Concentrations of organochlorines in blubber, mercury in muscle and liver, lead in liver, and lead and cadmium in kidneys did not indicate high exposure to these contaminants. Only cadmium in kidneys showed a positivde correlation with relative age. Copper concentrations in livers of these aquatic herbivores were significantly elevated in areas of high herbicidal copper usage after adjustment for significant age-related effects. Liver copper concentrations comparable to those associated with toxic effects in some domestic species were found in manatees from areas of high copper herbicide use. The use of copper herbicides for control of aquatic plants should be carefully managed in areas used intensively by manatees.

Citation Information

Publication Year 1984
Title Contaminant concentrations in manatees in Florida
Authors T. J. O'Shea, John F. Moore, H. I. Kochman
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Wildlife Management
Index ID 5221920
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center