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Miller. \"Biotic and abiotic factors predicting the global distribution and population density of an invasive large mammal.\" Scientific reports 7 (2017): 44152. Lewis, Jesse S., Joseph L. Corn, John J. Mayer, Thomas R. Jordan, Matthew L. Farnsworth, Christopher L. Burdett, Kurt C. VerCauteren, Steven J. Sweeney, and Ryan S. Miller. \"Historical, current, and potential population size estimates of invasive wild pigs (Sus scrofa) in the United States.\" Biological Invasions 21, no. 7 (2019): 2373-2384.", "mapName": "TCA_Feral_Pig_Density", "description": "Data are derived from generalized linear models and model selection techniques using 129 estimates of population density of wild pigs Sus scrofa) from 5 continents. Models were used to determine the strength of association among a diverse set of biotic and abiotic factors associated with wild pig population dynamics. The models and associated factors were used to predict the potential population density of wild pigs at the 1 km resolution. Predictions were then compared with available population estimates for wild pigs on their native range in North America indicating the predicted densities are within observed values. See Lewis et al (2017) and Lewis et al (2019) for more information.Lewis, Jesse S., Matthew L. Farnsworth, Chris L. Burdett, David M. Theobald, Miranda Gray, and Ryan S. Miller. \"Biotic and abiotic factors predicting the global distribution and population density of an invasive large mammal.\" Scientific reports 7 (2017): 44152. Lewis, Jesse S., Joseph L. Corn, John J. Mayer, Thomas R. Jordan, Matthew L. Farnsworth, Christopher L. Burdett, Kurt C. VerCauteren, Steven J. Sweeney, and Ryan S. Miller. \"Historical, current, and potential population size estimates of invasive wild pigs (Sus scrofa) in the United States.\" Biological Invasions 21, no. 7 (2019): 2373-2384.", "copyrightText": "The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. 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