U.S. Geological Survey Home Page USGS Patuxent Wildlife Research Center Science Meetings; dedicated to Chandler S. Robbins USGS Patuxent Wildlife Research Center; Science Meetings dedicated to Chandler S. Robbins Dedicated to Chan Robbins USGS Patuxent Wildlife Research Center; Science Meetings dedicated to Chandler S. Robbins Poster Abstracts from USGS Patuxent Wildlife Research Science Meetings, October, 2006
Patuxent Science Meeting 2006 Poster Abstract

CSI: Patuxent - Forensic research supporting wildlife law enforcement

Vyas NB, Spann JW, Hulse CS, Patterson D, Butterbrod JJ, Mengelkoch J,

MacDougall K, Williams BI, Pendergrass P, Torrez M, Leffel R, Bauer W, Olson

Wildlife law enforcement agents depend on forensic analyses to identify the cause of death in

order to build their case. The cause of death from organophosphorus and carbamate insecticide

poisonings is often not confirmed because the carcass matrices that are conventionally

analyzed are not available due to decomposition and scavenging. In such cases additional

methods are needed to determine insecticide exposure. Many scavenged and decomposed

carcasses retain intact feet that may have come into contact with the insecticides. We tested

three scenarios with respect to pesticide, foot type, and exposure to determine the temporal

reliability of pesticides on weathered and decomposed feet. Results show that certain

insecticides can be detected on feet for at least 28 days. We provide wildlife law enforcement

agents a tool for determining pesticide exposure after a bird has been long dead and the

conventional matrices are no longer available for analysis. Insecticide analysis of feet can raise

the certainty of the cause of death, thereby providing valuable evidence for wildlife law

Friday, September 22, 2006



Return to Posters page