| | english | español | français |
Go to record ID

  Home|Finding Information|Record details   Printer-friendly version

Information Resource
Record information and status
Record ID
Date of creation
2012-05-08 14:39 UTC (dina.abdelhakim@cbd.int)
Date of publication
2012-05-08 14:39 UTC (dina.abdelhakim@cbd.int)

General Information
Genetically Engineered Plants, Endangered Species, and Risk: A Temporal and Spatial Exposure Assessment for Karner Blue Butterfly Larvae and Bt Maize Pollen
Robert K.D. Peterson, Steven J. Meyer, Amy T. Wolf, Jeffrey D. Wolt, and Paula M. Davis
Author’s contact information
Robert K. D. Peterson,
Email: bpeterson@montana.edu

Dept. of Land Resources and Environmental Sciences
334 Leon Johnson Hall, Montana State University
Bozeman, MT 59717-3120

tel: 406-994-7927
fax: 406-994-3933
  • English
Publication date
Summary, abstract or table of contents

Genetically engineered maize (Zea mays) containing insecticidal endotoxin proteins from Bacillus thuringiensis (Bt) δ-endotoxin proteins has been adopted widely in the Midwestern United States. The proteins are toxic to several lepidopteran species and because a variety of maize tissues, including pollen, may express the endotoxins, the probability of exposure to nontarget species, including endangered species, needs to be understood. The objective of this study was to assess the potential temporal and spatial exposure of endangered Karner blue butterfly larvae (Lycaeides melissa samuelis) to Bt maize pollen in Wisconsin using probabilistic exposure techniques and geographic information systems analysis. Based on degree day modeling of butterfly phenology and maize pollen shed, there is some potential for temporal exposure of larvae to maize pollen. However, in the majority of years and locations, maize pollen shed most likely will occur after the majority of larval feeding on wild lupine (Lupinus perennis). The spatial analysis indicates that some Karner blue butterfly populations occur in close proximity to maize fields, but in the vast majority of cases the butterfly's host plant and maize fields are separated by more than 500 m. A small number of potential or existing Karner blue butterfly sites are located near maize fields, including sites in two of the four counties where temporal overlap is most likely. The exposure assessment indicates that these two counties should receive the highest priority to determine if Karner blue butterfly larvae are actually at risk and then, if needed, to reduce or prevent exposure.
Thematic areas
  • Scientific and technical issues
    • Risk assessment
    • Risk management
Background material to the “Guidance on risk assessment of living modified organisms”
Is this document is recommend as background material for the “Guidance on Risk Assessment of Living Modified Organisms”
Section(s) of the “Guidance on Risk Assessment of Living Modified Organisms” this background material is relevant
Additional Information
Type of resource
  • Article (journal / magazine / newspaper)
DOI: 10.1111/j.1539-6924.2006.00763.x
Publisher and its location
Society for Risk Analysis
McLean, VA, USA
© 2006 Society for Risk Analysis
14 page PDF
Risk Analysis
Keywords and any other relevant information
Key words: Biosafety; biotechnology risk; Karner blue butterfly; Lycaeides melissa samuelis; risk assessment

Citation: Risk Analysis, Vol. 26, No. 3, 2006