You are here: Home
/ Publication Information
Title: Eggshell quality and organochlorine residues in eggs of merlins, Falco columbarius, in southeastern Montana
Author: Becker, Dale M.; Sieg, Carolyn Hull
Source: Canadian Field-Naturalist. 101(3): 369-372.
Description: Eggshell weight and thickness indices of Richardson’s Merlin (Falco columbarius richardsonii) eggs collected in southeastern Montana were significantly (p < 0.01) lower than pre-1946 samples. Montana eggshells showed reductions of 13% in shell weight and 20% in shell thickness indices when compared to eggshells collected before 1946. The decreased eggshell weights and thickness indices and the occurrence of 7 organochlorine compounds in Merlin eggs recently collected in southeastern Montana indicates that this raptor population merits periodic monitoring.
Keywords: 0rganochlorines, Merlin, Falco columbarius, pesticides, Montana
View or Print this Publication (196 KB)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
Becker, Dale M.; Sieg, Carolyn Hull 1987. Eggshell quality and organochlorine residues in eggs of merlins, Falco columbarius, in southeastern Montana. Canadian Field-Naturalist. 101(3): 369-372.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility