Re-exposure of mallards to selenium after chronic exposure

Journal Article · Wed Sep 01 04:00:00 EDT 1993 · Environmental Toxicology and Chemistry; (United States)

DOI:https://doi.org/10.1002/etc.5620120918· OSTI ID:5811272

Heinz, G H ^[1]

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1. U.S. Fish and Wildlife Service, Laurel, MD (United States). Patuxent Wildlife Research Center

Adult male mallards (Anas platyrhynchos) were fed a control diet or a diet containing 15 ppm selenium as seleno-D,L-methionine for 21 weeks. After this initial exposure, the mallards were fed untreated food for 12 weeks, then were re-exposed to selenium at 100 ppm for five weeks. During re-exposure to 100 ppm selenium, the birds that had previously been exposed to 15 ppm selenium and those that had not previously been exposed did not differ in percentage of mortality, weight loss in survivors, selenium concentrations in the livers of survivors, or selenium concentrations in the livers of birds that died. When the data from the birds that had previously been exposed to 15 ppm selenium were combined in the livers of birds that had died on the 100-ppm selenium treatment did not differ from the concentrations in the livers of birds that had survived.

• OSTI ID: 5811272
• Journal Information: Environmental Toxicology and Chemistry; (United States), Journal Name: Environmental Toxicology and Chemistry; (United States) Vol. 12:9; ISSN ETOCDK; ISSN 0730-7268
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BIOLOGICAL EFFECTS
BIRDS
CHRONIC EXPOSURE
DISTRIBUTION
ELEMENTS
SELENIUM
SEMIMETALS
SENSITIVITY
TISSUE DISTRIBUTION
VERTEBRATES