Basil G. Savitsky is assistant professor in the Graduate School of Geography and coordinator of the M.A. program in GIS and International Development at Clark University.Thomas E. Lacher Jr. is professor and Caesar Kleberg Chair in Wildlife Ecology in the Department of Wildlife and Fisheries Sciences at Texas A & M University. Formerly the director of the Archbold Tropical Research Center at Clemson University (1989-1996), he is the coauthor, with R. J. Kendall, of Wildlife Toxicology and Population Modeling: Integrated Studies of Agroecosystems.