Digital Commons Network^™

An Agent-Based Movement Model To Assess The Impact Of Landscape Fragmentation On Disease Transmission, Jeff A. Tracey, Sarah N. Bevins, Sue Vandewoude, Kevin R. Crooks

United States Department of Agriculture Wildlife Services: Staff Publications

Landscape changes can result in habitat fragmentation and reduced landscape connectivity, limiting the ability of animals to move across space and altering infectious disease dynamics in wildlife. In this study, we develop and implement an agent-based model to assess the impacts of animal movement behavior and landscape structure on disease dynamics. We model a susceptible/infective disease state system applicable to the transmission of feline immunodeficiency virus in bobcats in the urbanized landscape of coastal southern California. Our agent-based model incorporates animal movement behavior, pathogen prevalence, transmission probability, and habitat fragmentation to evaluate how these variables influence disease spread in urbanizing …

Memory-Based Quantity Discrimination In Coyotes (Canis Latrans), Salif Mahamane, Kevin L. Grunig, Joseph Baker, Julie K. Young, Kerry E. Jordan

United States Department of Agriculture Wildlife Services: Staff Publications

Previous research has shown that the ratio between competing quantities of food significantly mediates coyotes‘ (Canis latrans) ability to choose the larger of two food options. These previous findings are consistent with predictions made by Weber‘s Law and indicate that coyotes possess quantity discrimination abilities that are similar to other species. Importantly, coyotes‘ discrimination abilities are similar to domestic dogs (Canis lupus familiaris), indicating that quantitative discrimination may remain stable throughout certain species‘ evolution. However, while previously shown in two domestic dogs, it is unknown whether coyotes possess the ability to discriminate visual quantities from memory. …

Disease Risks ·Posed By Wild Birds Associated With Agricultural Landscapes, Larry Clark

United States Department of Agriculture Wildlife Services: Staff Publications

There are over 1,400 cataloged human pathogens, with approximately 62% classified as zoonotic (Taylor et aI., 2001). While most evidence of direct transmission of pathogens to humans involves domestic and companion animals, the reservoir for most zoonoses is wildlife, yet there are relatively few well-documented cases for the direct involvement of transmission from wildlife to humans (Kruse et aI., 2004). In part, this absence of evidence reflects the mobility of wildlife, the difficulty in accessing relevant samples, and the smaller number of studies focused on characterizing wildlife pathogens relative to the human and veterinary literature (McDiarmid, 1969; Davies et aI., …

The Limits Of Legality: Assessing Recent International Interventions In Civil Conflicts In The Middle-East, Feisal Amin Istrabadi

Articles by Maurer Faculty

No abstract provided.

How Should Governments Promote Distributive Justice?: A Framework For Analyzing The Optimal Choice Of Tax Instruments, David Gamage

Articles by Maurer Faculty

A particular methodology derived from public finance economics has become very influential in the legal literature on taxation and related topics. Sometimes called the “double-distortion” approach, this methodology forms the heart of Louis Kaplow’s book “The Theory of Taxation and Public Economics” and is also the foundation of prominent work by other leading tax legal scholars such as David Weisbach and James Hines.

This Article develops an extended critique of how the double-distortion approach has been used to make legal policy arguments. In doing so, this Article constructs a framework for analyzing how governments can optimally raise revenues and promote …

Environmental Salmonella In Agricultural Fair Poultry Exhibits In Colorado, K. L. Pabilonia, K. J. Cadmus, T. M. Lingus, D. S. Bolte, M. M. Russell, D. C. Van Metre, M. M. Erdman

United States Department of Agriculture Wildlife Services: Staff Publications

Salmonella enterica is a common zoonotic pathogen in humans. Transmission typically occurs through consumption of contaminated food products or contact with infected animals, including poultry or their environment. The objective of this study was to estimate the frequency of Salmonella contamination in the environment in poultry exhibits at agricultural fairs. Samples were collected from cages, feed, floors and tables in the exhibit and cultured for Salmonella. At least one environmental sample was positive for Salmonella in 10 of 11 fairs (91%), and Salmonella was isolated from 28 of 55 environmental samples (50.9%). Eleven different serotypes were detected. Results of …

Novel Management Methods: Immunocontraception And Other Fertility Control Tools, Giovanna Massei, Dave Cowan, Douglas C. Eckery

United States Department of Agriculture Wildlife Services: Staff Publications

Impacts of overabundant ungulate populations on human activities and conservation include crop and forestry losses, collisions with vehicles, disease transmission, nuisance behaviour, damage to infrastructures, predation on livestock and native species, and reduction of biodiversity in plant and animal communities (e.g. Curtis et ai., 2002; Massei et al., 2011; Reimoser and Putman, 2011; Ferroglio et ai., 2011; Langbein et al., 2011). Current trends in human population growth and landscape development indicate that human-ungulate conflicts in Europe, as well as in the United States, are likely to increase in parallel with increased expansion in numbers and range of many of these …

A Way Forward For Tax Law And Economics? A Response To Osofsky's "Frictions, Screening, And Tax Law Design", David Gamage

Articles by Maurer Faculty

This Essay responds to Leigh Osofsky's, "Who’s Naughty and Who’s Nice? Frictions, Screening, and Tax Law Design." Osofsky’s analysis suggests that tax rules might be designed so as to take account both of heterogeneity in taxpayers’ tax planning proclivities and of taxpayer characteristics relevant for distribution. By designing tax rules so as to create frictions that differentially impose higher costs on those taxpayers who are more successfully circumventing existing taxes we can perhaps reform our tax system so as to better achieve equitable distribution at lower efficiency costs. This Essay argues that Osofsky's analysis is generally correct and that it …

Finding A Fox: An Evaluation Of Survey Methods To Estimate Abundance Of A Small Desert Carnivore, Steven J. Dempsey, Eric M. Gese, Bryan M. Kluever

United States Department of Agriculture Wildlife Services: Staff Publications

The status of many carnivore species is a growing concern for wildlife agencies, conservation organizations, and the general public. Historically, kit foxes (Vulpes macrotis) were classified as abundant and distributed in the desert and semi-arid regions of southwestern North America, but is now considered rare throughout its range. Survey methods have been evaluated for kit foxes, but often in populations where abundance is high and there is little consensus on which technique is best to monitor abundance. We conducted a 2-year study to evaluate four survey methods (scat deposition surveys, scent station surveys, spotlight survey, and trapping) for …

Letting Go Of Old Ideas, William D. Henderson

Articles by Maurer Faculty

No abstract provided.

Tweeted Out: Management Tools To Prevent Social Media From Monopolizing Your Time, Ashley A. Ahlbrand

Articles by Maurer Faculty

No abstract provided.

Report To The Chicago Park District On Conflicts With Ring-Billed Gulls And The 2014 Integrated Ring-Billed Gull Damage Management Project, M. L. Bloomquist, J.W. Hartmann, T.G. Guerrant, S. F. Beckerman, R. M. Engeman

United States Department of Agriculture Wildlife Services: Staff Publications

The large ring-billed gull (Larus delawarensis) population in the City of Chicago has caused various conflicts including general nuisance, property damage, economic losses, and threats to human health and safety. Several studies have shown a relationship between ring-billed gulls and increased levels of fecal indicator bacteria (FIB) such as Escherichia coli (E. coli) in nearshore waters. Results of tests for E. coli have led to the issuance of swim advisories at Chicago beaches.

The objectives of the Chicago Ring-billed Gull Damage Management Project were to (1) reduce the local production of ring-billed gulls, (2) reduce the …

Predicted Wildlife Disease-Related Climate Change Impacts Of Specific Concern To Usda Aphis Wildlife Services, Timothy P. Algeo, Richard B. Chipman, Dennis Slate, Jerome E. Freier, Thomas J. Deliberto

United States Department of Agriculture Wildlife Services: Staff Publications

USDA APHISWildlife Services plans for and responds to a variety of exigencies such as wildlife hazards to aircraft, disease emergence from wildlife translocations, oral rabies vaccine barrier compromises, and extreme weather events. These are often collaborative efforts with state and federal agencies and others. Climate change based in part on fossil fuel use and methane gas emissions has predictable as well as unknown consequences. As a federal leader in wildlife disease research and management, it is incumbent upon Wildlife Services to be current with the scientific literature; assess potential impacts and wildlife disease management intervention needs from predicted climate change …

Economic Impact Of The Potential Spread Of Vampire Bats Into South Texas, Aaron M. Anderson, Steven S. Shwiff, Stephanie A. Shwiff

United States Department of Agriculture Wildlife Services: Staff Publications

Rabies transmitted by the common vampire bat is a major public health concern in subtropical and tropical areas of Latin America, and there is some concern that the species will eventually spread into south Texas. The objective of this study was to estimate the total economic impact of the potential spread of vampire bats into south Texas. Data on livestock populations and values in the relevant counties was combined with expected mortality rates to calculate livestock losses. An IMPLAN model of the regional economy was then used to estimate the secondary impacts experienced by other businesses in the region. These …

Book Review. Deficits, Debt, And The New Politics Of Tax Policy By Dennis S. Ippolito, Ajay K. Mehrotra

Articles by Maurer Faculty

No abstract provided.

Wildlife Damage Management: Changes Over The Last 40 Years And A Look At The Future, Kathleen A. Fagerstone

United States Department of Agriculture Wildlife Services: Staff Publications

Since becoming a wildlife biologist 40 years ago, I have seen many changes. Yet some things have remained the same, like the economic impact of wildlife damage, which was high in 1974 and even higher now. In 2014, the worldwide cost of damage by vertebrate pests to agriculture will exceed $1 billion. The world’s human population has increased at an unprecedented rate, while some wildlife populations have also burgeoned over the past 40 years due to land-use changes and effective management programs. These simultaneous human and wildlife population increases have led to increasing conflicts between humans and wildlife. Nor has …

Invasive Vertebrate Species And The Challenges Of Management, William C. Pitt, Gary W. Witmer

United States Department of Agriculture Wildlife Services: Staff Publications

Invasive vertebrates have had significant effects on native species, ecosystem processes, human health and economies around the world for more than 200 years. However, in the last 30 years, the breadth and impact of invasive species has accelerated with the growth and integration of high speed transportation networks. The effects of many non-native species are often difficult to predict prior to establishment. Current efforts to manage invasive species can be broken into the areas of prevention of introduction and detection of incipient populations, documentation of impacts, and development and implementation of management tools. We address various aspects of these areas …

Prevention And Control Of Wildlife Damage, 5th Edition, Scott E. Hygnstrom, Robert M. Timm, Paul D. Curtis, Dale L. Nolte, Mark E. Tobin, Kurt C. Vercauteren

United States Department of Agriculture Wildlife Services: Staff Publications

The book Prevention and Control of Wildlife Damage (PCWD) is the award-winning and leading reference in the field. Over 13,000 copies of the 4th edition were sold, and we conservatively estimate that it saves $210 million in resources and $220 million in labor annually. Emerging issues and changes in the field, however, have precipitated the need for a new 5th edition of PCWD. Six editors and over 120 authors are working to create the next edition, which will include 36 new and 77 revised chapters. We anticipate that the 5th edition of PCWD and derivative products will be available as …

Invasive Rodent Ecology, Impacts, And Management With An Emphasis On The United States, Gary W. Witmer, William C. Pitt, Gregg Howald

United States Department of Agriculture Wildlife Services: Staff Publications

Many invasive rodent species have become established in the United States and its territories, both on the mainland and on islands. While most were introduced accidently, some were introduced for food or fur. These rodents have caused serious impacts to native flora and fauna, agriculture, and other resources. They have caused the extinction of many species of birds in insular ecosystems. Although many methods are used to control or eradicate introduced rodents, rodenticides and traps are the main tools. Since the early 1990s, agencies have been eradicating rodents from various islands, primarily for conservation purposes. There have been numerous eradication …

Rat Density On Diego Garcia: Implications For Eradication Feasibility, Scott Vogt, Daniel S. Vice, William C. Pitt, Antenor Nestor Guzman, Ernesto J. Necessario, Are R. Berentsen

United States Department of Agriculture Wildlife Services: Staff Publications

Introduced black rats are among the most invasive species to islands worldwide. In addition to agricultural impacts, rats are vectors of disease, cause damage to native flora and fauna, and negatively impact threatened/endangered species. Eradication efforts have met with mixed success. Success or failure of an eradication effort can depend on the population density of the target species, which can influence rodenticide sowing rates. We used snap trapping grids to estimate black rat densities in two different forest types on Diego Garcia: coconut forest and mixed species forest. Individual snap traps baited with fresh coconut were placed every 10 m …

Estimating The Total Economic Impact Of Black Bear Peeling In Western Oregon Using Gis And Remi, Jimmy D. Taylor Ii, Anita Morzillo, Aaron M. Anderson

United States Department of Agriculture Wildlife Services: Staff Publications

In parts of the Pacific Northwest, black bears emerge from winter dens with depleted fat reserves and feed on mature conifers by stripping bark and consuming sugar-rich sapwood. Peeling by bears affects commercial conifers through direct loss of the tree or degraded log quality at stand harvest. Bears generally peel trees from 15-30 years old in intensively managed forests until preferred foods such as fruits and berries are available, and a single bear can peel several trees per day. Dying trees have a signature red canopy and are detected in annual aerial forest health surveys; however, trees that scar over …

Efficacy Of Rodenticides For Roof Rat And Deer Mouse Control In Orchards, Niamh Niamh Quinn, David H. Davis, Richard M. Engeman, Roger A. Baldwin

United States Department of Agriculture Wildlife Services: Staff Publications

Roof rats and deer mice are occasional pests of orchard crops throughout the world. The application of rodenticides is an effective and practical method for controlling rodent pests and reducing damage. However, a paucity of information exists on the efficacy of rodenticides in orchards for these pest species. To address this gap in knowledge, we first developed an index to measure rodent activity in order to monitor efficacy of rodenticides. We then used this index to test the efficacy of 3 first-generation anticoagulant rodenticide baits to determine their utility for controlling roof rats and deer mice in agricultural orchards. Of …

Potential Use Of Perennial Sunflower To Reduce Blackbird Damage To Sunflower, George M. Linz, Brent Hulke, Michael Kantar, Jeffrey Homan, Robert Stupar, Donald Wyse

United States Department of Agriculture Wildlife Services: Staff Publications

Wildlife Conservation Sunflower Plots (WCSP) have shown potential to reduce blackbird (Icteridae) damage in commercial sunflower. Also known as lure, decoy, or trap crops, WCSP are strategically placed food plots that provide an easily available and proximate food source that entices blackbirds away from valuable commercial crops. By providing an alternative food source, WCSP reduce direct damage to commercial fields, while also lowering indirect costs that producers incur attempting to prevent blackbird damage. However, cost inefficiencies have deterred widespread use of WCSP. Cost-benefit ratios of using WCSP would be greatly improved if a perennial sunflower were used instead of the …

Voting Rights Law And Policy In Transition, Luis Fuentes-Rohwer, Guy-Uriel E. Charles

Articles by Maurer Faculty

No abstract provided.

Human Capital Accounting, William D. Henderson

Articles by Maurer Faculty

No abstract provided.

Systematic Government Access To Private-Sector Data Redux, Fred H. Cate, Christopher Kuner, Christopher Millard, Dan Jerker B. Svantesson

Articles by Maurer Faculty

No abstract provided.

When Two Worlds Collide: The Interface Between Competition Law And Data Protection, Fred H. Cate, Christopher Kuner, Christopher Millard, Dan Jerker B. Svantesson, Orla Lynskey

Articles by Maurer Faculty

No abstract provided.

Taking Stock After Four Years, Fred H. Cate, Christopher Kuner, Christopher Millard, Dan Jerker B. Svantesson

Articles by Maurer Faculty

No abstract provided.

How Civil Society Represents Women: Feminists, Catholics, And Mobilization Strategies In Africa, Alice J. Kang

Department of Political Science: Faculty Publications

In recent years, civil society has risen to speak on behalf of underrepresented groups in Africa. In particular, civil society has advocated for the representation of women’s interests. Yet, relatively little is known about the full range of actors who seek the representation of women’s interests, mobilize around women’s issues, and articulate specific preferences. Some of these actors include not only feminists, but also religious activists who may clash over women’s issues. This gap in knowledge, moreover, extends to non-democratic countries. Who in civil society seeks to influence the representation of women’s interests and how, in both democratic and authoritarian …

Differences In Negativity Bias Underlie Variations In Political Ideology, John R. Hibbing, Kevin B. Smith, John R. Alford

Department of Political Science: Faculty Publications

Disputes between those holding differing political views are ubiquitous and deep-seated, and they often follow common, recognizable lines. The supporters of tradition and stability, sometimes referred to as conservatives, do battle with the supporters of innovation and reform, sometimes referred to as liberals. Understanding the correlates of those distinct political orientations is probably a prerequisite for managing political disputes, which are a source of social conflict that can lead to frustration and even bloodshed. A rapidly growing body of empirical evidence documents a multitude of ways in which liberals and conservatives differ from each other in purviews of life with …