Eggshell modifications in captive American kestrels resulting from aroclor® 1248 in the diet

  • T. Peter Lowe
  • Rey C. Stendell

DOI: 10.1007/BF01065842

Cite this article as:
Lowe, T.P. & Stendell, R.C. Arch. Environ. Contam. Toxicol. (1991) 20: 519. doi:10.1007/BF01065842


American kestrels (Falco sparverius) were fed diets containing 3 μg/g Aroclor® 1 1248 or control diets from mid-January until July. Eggs were removed from first clutches 2 to 4 days after laying ceased and shell thickness and shell dimensions were measured. Contents of the third egg of each clutch, the carcasses of all adults that received Aroclor® 1248 and of three males and three females that received the control diet were analyzed for DDE, Aroclors® 1248, 1254 and 1260, and dieldrin. Concentrations of PCBs, DDE and dieldrin were significantly higher (P < 0.03) in eggs and carcasses from treated adults than in controls. Shell thickness and shell thickness index of eggs from treated adults were reduced 5.0% (P < 0.0001) and 4.8% (P < 0.0001), respectively, from those of controls.

Copyright information

© Springer-Verlag New York Inc. 1991

Authors and Affiliations

  • T. Peter Lowe
    • 1
  • Rey C. Stendell
    • 2
  1. 1.U.S. Fish and Wildlife ServicePatuxent Wildlife Research CenterLaurelUSA
  2. 2.U.S. Fish and Wildlife ServiceNational Ecology CenterFort CollinsUSA

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