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Retention of Physiological Marks by Coyotes Ingesting Baits Containing Iophenoxic Acid, Mirex, and Rhodamine B
Special Technical Publication 974
  • Frederick Knowlton, Utah State University
  • Peter J. Savarie
  • Craig E. Wahlgren
  • David J. Hayes
Document Type
Contribution to Book
Publisher
American Society for Testing and Materials
Publication Date
1-1-1987
Disciplines
Abstract

Pen-reared coyotes (Canis latrans) voluntarily ingested small tallow baits containing 10 or 15 mg of iophenoxic acid, 100-mg mirex, and 150-mg rhodamine B. One week after treatment with 10 and 15-mg iophenoxic acid, mean serum iodine was elevated from pretreatment levels of less than 5 μg/100mL to 175 and 324 μg/100mL, respectively. Serum iodine levels declined to about 25 μg/100mL after four months, but were still fivefold higher than controls. Coyotes that ate baits containing 100-mg mirex averaged 0.34-ppm mirex in serum one week later levels declined to 0.15 ppm after four months. Serum samples obtained 2 and 24 h after death contained higher concentrations of iodine and mirex than samples obtained immediately before death. Although some back guard hairs of coyotes fed 150-mg rhodamine B showed distinct fluorescent bands, rhodamine B did not appear to provide a dependable mark because all guard hairs were not marked.

Citation Information
Frederick Knowlton, Peter J. Savarie, Craig E. Wahlgren and David J. Hayes. "Retention of Physiological Marks by Coyotes Ingesting Baits Containing Iophenoxic Acid, Mirex, and Rhodamine B" Special Technical Publication 974 Vol. Philadelphia, PA (1987) p. 141 - 147
Available at: http://works.bepress.com/frederick_knowlton/70/