Digital Commons Network^™

How Behavior Of Nontarget Species Affects Perceived Accuracy Of Scat Detection Dog Surveys, Karen E. Dematteo, Linsey W. Blake, Julie K. Young, Barbara Davenport

United States Department of Agriculture Wildlife Services: Staff Publications

Detection dogs, specially trained domestic dogs (Canis familiaris), have become a valuable, noninvasive, conservation tool because they remove the dependence of attracting species to a particular location. Further, detection dogs locate samples independent of appearance, composition, or visibility allowing researchers to collect large sets of unbiased samples that can be used in complex ecological queries. One question not fully addressed is why samples from nontarget species are inadvertently collected during detection dog surveys. While a common explanation has been incomplete handler or dog training, our study aimed to explore alternative explanations. Our trials demonstrate that a scat’s genetic …

Plumage Changes In Double-Crested Cormorants (Phalacrocorax Auritus) Within The Breeding Season: The Risks Of Aging By Plumage, Jennifer E. Chastant, D. Tommy King

United States Department of Agriculture Wildlife Services: Staff Publications

Scant attention has been given to the molting patterns of known-age Double-crested Cormorants (Phalacrocorax auritus). In general, subadult individuals are identified with a tan, buffy or mottled chest, and adults are identified with a black chest. While studying Double-crested Cormorant population dynamics in Ontario, Canada, with known-age birds, it was noted that the plumage of many (> 75%) breeding adults changed from black to heavily mottled during the course of the breeding season. No pattern with age was observed; plumage changed in equal proportions for all ages from 2-year-olds to 7-year-olds. A similar but reverse pattern has been …

State Management Of Human– Wildlife Conflicts, Kurt C. Vercauteren, Daniel Hirchert, Scott Hygnstrom

United States Department of Agriculture Wildlife Services: Staff Publications

Many positive experiences are associated with wildlife, from passively watching animals in our backyards to actively hunting in publicly owned forests. Unfortunately, wildlife can be a double- edged sword. Human– wildlife conflicts are pervasive in society, and nearly all segments—wealthy and in need, urban and rural, east and west—can experience problems with wildlife. Agricultural producers lose an estimated $45 billion each year as a result of crop and livestock damage caused by big game, predators, waterfowl, and other wildlife species (Conover 2002). Row crops, forages, rangeland, fruits, vegetables, ornamentals, turf, and livestock are susceptible to damage by wildlife at various …

Behavioral Differences Following Ingestion Of Large Meals And Consequences For Management Of A Harmful Invasive Snake: A Field Experiment, Shane R. Siers, Amy A. Yackel Adams, Robert N. Reed

United States Department of Agriculture Wildlife Services: Staff Publications

Many snakes are uniquely adapted to ingest large prey at infrequent intervals. Digestion of large prey is metabolically and aerobically costly, and large prey boluses can impair snake locomotion, increasing vulnerability to predation. Cessation of foraging and use of refugia with microclimates facilitating digestion are expected to be strategies employed by free-ranging snakes to cope with the demands of digestion while minimizing risk of predation. However, empirical observations of such submergent behavior from field experiments are limited. The brown treesnake (Serpentes: Colubridae: Boiga irregularis) is a nocturnal, arboreal, colubrid snake that was accidentally introduced to the island of Guam, …

Estimating The Economic Impact Of Canine Rabies To Viet Nam 2005–2014, Stephanie A. Shwiff, Vienna R. Brown, Thu Trang Dao, Julie Elser, Hoang Xuan Trung, Nguyen Ngoc Tien, Nguyen Thi Huong, Nguyen Thi Thanh Huong, Arthorn Riewpaiboon, Karina Ernst, Steven Shwiff, David Payne

United States Department of Agriculture Wildlife Services: Staff Publications

The global economic impact of canine rabies has been estimated by several studies. Asia bears a disproportionate burden of this zoonosis due to high levels of human deaths and rates of post-exposure prophylaxis (PEP), but low investment in preventative dog vaccination. The same factors that cause rabies to burden much of Asia are also present in Viet Nam. This study estimated the economic burden of canine rabies in a societal perspective including direct and indirect cost of rabies in dogs, livestock, and humans. Using data collected from personal interviews, published literature, published and supplementary reports, and primary data collection, we …

Quantification Of Avian Hazards To Military Aircraft And Implications For Wildlife Management, Morgan Pfeiffer, Bradley F. Blackwell, Travis L. Devault

United States Department of Agriculture Wildlife Services: Staff Publications

Collisions between birds and military aircraft are common and can have catastrophic effects. Knowledge of relative wildlife hazards to aircraft (the likelihood of aircraft damage when a species is struck) is needed before estimating wildlife strike risk (combined frequency and severity component) at military airfields. Despite annual reviews of wildlife strike trends with civil aviation since the 1990s, little is known about wildlife strike trends for military aircraft. We hypothesized that species relative hazard scores would correlate positively with aircraft type and avian body mass. Only strike records identified to species that occurred within the U.S. (n = 36,979) …

Fertility Control For Managing Free-Roaming Feral Cattle In Hong Kong, Giovanna Massei, Ka-Kei Koon, Siu-Iun Law, Matt Gomm, Darcy S. O. Mora, Rebecca Callaby, Kate Palphramand, Douglas C. Eckery

United States Department of Agriculture Wildlife Services: Staff Publications

Human-wildlife conflicts are increasing worldwide. For instance, growing numbers of free-roaming feral cattle in Hong Kong are causing traffic accidents and damaging crops. Public antipathy towards lethal methods to manage wildlife has promoted research into alternative options, such as fertility control. The aims of this study were to assess the potential side effects and effectiveness of the injectable immunocontraceptive vaccine GonaCon on free-roaming feral cattle in Hong Kong. Sixty female cattle were captured and randomly assigned to treatment or control groups. Treatment animals were administered one dose of GonaCon, followed by a booster dose 3–6 months later. Control animals were …

Roads Do Not Increase Carrion Use By A Vertebrate Scavenging Community, Jacob E. Hill, Travis L. Devault, James C. Beasley, Olin E. Rhodes Jr., Jerrold L. Belant

United States Department of Agriculture Wildlife Services: Staff Publications

Wildlife-vehicle collisions introduce a considerable amount of carrion into the environment, but scavenger use of this resource has not been extensively investigated. Scavengers may use roads for reliable foraging opportunities, but might also use roads for other purposes and encounter carrion opportunistically. We examined scavenging of carrion along linear features by placing 52 rabbit carcasses in each of three treatments in forested habitat during winter (Dec 2016-Mar 2017) in South Carolina, USA: roads, power line clearings (linear feature with fewer carcasses than roads due to lack of road kill), and forest interior. We used motion-activated cameras to compare arrival times …

Evaluating An Alleged Mimic Of The Monarch Butterfly: Neophasia (Lepidoptera: Pieridae) Butterflies Are Palatable To Avian Predators, Dale A. Halbritter, Johnalyn M. Gordon, Kandy L. Keacher, Michael L. Avery, Jaret C. Daniels

United States Department of Agriculture Wildlife Services: Staff Publications

Some taxa have adopted the strategy of mimicry to protect themselves from predation. Butterflies are some of the best representatives used to study mimicry, with the monarch butterfly, Danaus plexippus (Lepidoptera: Nymphalidae) a well-known model. We are the first to empirically investigate a proposed mimic of the monarch butterfly: Neophasia terlooii, the Mexican pine white butterfly (Lepidoptera: Pieridae). We used captive birds to assess the palatability of N. terlooii and its sister species, N. menapia, to determine the mimicry category that would best fit this system. The birds readily consumed both species of Neophasia and a palatable control species but …

Cross-Fostering As A Conservation Tool To Augment Endangered Carnivore Populations, Eric M. Gese, William T. Waddell, Patricia A. Terletzky, Chris F. Lucash, Scott R. Mclellan, Susan K. Behrns

United States Department of Agriculture Wildlife Services: Staff Publications

Cross-fostering offspring with nonbiological parents could prove useful to augment populations of endangered carnivores. We used cross-fostering to augment captive-born and wild-born litters for the endangered red wolf (Canis rufus). Between 1987 and 2016, 23 cross-fostering events occurred involving captive-born pups fostered into captive litters (n = 8 events) and captive-born pups fostered into wild recipient litters (n = 15 events). Percentage of pups surviving 3 and 12 months was 91.7% for captive-born pups fostered into captive recipient litters. For pups fostered into wild litters, percentage of pups surviving 5 months was > 94% among fostered pups …

Persistence Of Maternal Antibodies To Influenza A Virus Among Captive Mallards (Anas Platyrhynchos), Katherine L. Dirsmith, J. Jeffrey Root, Kevin T. Bentler, Heather J. Sullivan, Andrea B. Liebowitz, Lauren H. Petersen, Hailey E. Mclean, Susan A. Shriner

United States Department of Agriculture Wildlife Services: Staff Publications

Wild waterfowl are maintenance hosts of most influenza A virus (IAV) subtypes and are often the subjects of IAV surveillance and transmission models. While maternal antibodies have been detected in yolks and in nestlings for a variety of wild bird species and pathogens, the persistence of maternal antibodies to IAVs in mallard ducklings (Anas platyrhynchos) has not been previously investigated. Nonetheless, this information is important for a full understanding of IAV transmission dynamics because ducklings protected by maternal antibodies may not be susceptible to infection. In this study, we examined the transfer of IAV-specific maternal antibodies to ducklings. …

Absence Of Native Flower Visitors For The Endangered Hawaiian Mint Stenogyne Angustifolia: Impending Ecological Extinction?, Clare E. Aslan, Christina T. Liang, Aaron B. Shiels, William Haines

United States Department of Agriculture Wildlife Services: Staff Publications

If an organism becomes rare enough that it no longer participates in certain interspecific interactions, it can be said to have become ecologically extinct, even though it is still present. This form of extinction is much less recognized than global extinctions, although it may have ramifications for ecological community function. Here, we describe a case of possible or pending ecological extinction of an endemic Hawaiian plant. We performed over 120 h of systematic flower visitation observations of the endangered Hawaiian mint, Stenogyne angustifolia, in its wild habitat. The robust size and open shape of S. angustifolia flowers, along with their …

Tissue Tropisms Opt For Transmissible Reassortants During Avian And Swine Influenza A Virus Co-Infection In Swine, Xiaojian Zhang, Hailiang Sun, Fred L. Cunningham, Lei Li, Katie Hanson-Dorr, Matthew W. Hopken, Jim Cooley, Li-Ping Long, John A. Baroch, Tao Li, Brandon S. Schmit, Xiaoxu Lin, Alicia K. Olivier, Richard G. Jarman, Thomas J. Deliberto, Xiu-Feng Wan

United States Department of Agriculture Wildlife Services: Staff Publications

Genetic reassortment between influenza A viruses (IAVs) facilitate emergence of pandemic strains, and swine are proposed as a “mixing vessel” for generating reassortants of avian and mammalian IAVs that could be of risk to mammals, including humans. However, how a transmissible reassortant emerges in swine are not well understood. Genomic analyses of 571 isolates recovered from nasal wash samples and respiratory tract tissues of a group of co-housed pigs (influenza-seronegative, avian H1N1 IAV–infected, and swine H3N2 IAV– infected pigs) identified 30 distinct genotypes of reassortants. Viruses recovered from lower respiratory tract tissues had the largest genomic diversity, and those recovered …

Intercanine Width Measurements To Aid Predation Investigations: A Comparison Between Sympatric Native And Non-Native Carnivores In The Mexican Wolf Recovery Area, Tana Verzuh, David L. Bergman, Scott C. Bender, Maggie Dwire, Stewart W. Breck

United States Department of Agriculture Wildlife Services: Staff Publications

Mexican wolves (Canis lupus baileyi) share their range with a number of sympatric carnivores, many of which are a concern to livestock producers because they can prey on livestock. Determining which predator species is responsible for killing livestock is important for determining appropriate management actions and for the conservation of Mexican wolves. A variety of information can be used to decipher which carnivore species was responsible for making a kill, and mandibular (upper) and maxillary (lower) intercanine width measurements (i.e., bite mark analysis) can aid this process. No research has been conducted to validate the usefulness of bite …

Parental Habituation To Human Disturbance Over Time Reduces Fear Of Humans In Coyote Offspring, Christopher J. Schell, Julie K. Young, Elizabeth V. Lonsdorf, Rachel M. Santymire, Jill M. Mateo

United States Department of Agriculture Wildlife Services: Staff Publications

A fundamental tenet of maternal effects assumes that maternal variance over time should have discordant consequences for offspring traits across litters. Yet, seldom are parents observed across multiple reproductive bouts, with few studies considering anthropogenic disturbances as an ecological driver of maternal effects. We observed captive coyote (Canis latrans) pairs over two successive litters to determine whether among‐litter differences in behavior (i.e., risk‐taking) and hormones (i.e., cortisol and testosterone) corresponded with parental plasticity in habituation. Thus, we explicitly test the hypothesis that accumulating experiences of anthropogenic disturbance reduces parental fear across reproductive bouts, which should have disparate phenotypic …

American Black Bear Den-Site Selection And Characteristics In An Urban Environment, Toryn L. J. Schafer, Stewart W. Breck, Sharon Baruch-Mordo, David L. Lewis, Kenneth R. Wilson, Julie S. Mao, Thomas L. Day

United States Department of Agriculture Wildlife Services: Staff Publications

Selection of den sites is a crucial aspect of American black bear (Ursus americanus) life history. High-quality dens provide thermal insulation, protection from disturbance, suitable environment for parturition and cub development, and proximity to available forage upon emergence. Black bears are increasingly coexisting with people in human-dominated landscapes; however, little is known about whether urban environments influence characteristics of dens and den site selection. Our objective was to determine the effect of housing density (a proxy for human activity and availability of anthropogenic resources) on selection of den sites in years of good and poor natural forage.We additionally …

Viral Shedding Of Clade 2.3.4.4 H5 Highly Pathogenic Avian Influenza A Viruses By American Robins, J. Jeffrey Root, Angela M. Bosco-Lauth, Nicole L. Marlenee, Richard A. Bowen

United States Department of Agriculture Wildlife Services: Staff Publications

American robins (Turdus migratorius) are commonly associated with farmsteads in the United States and have shown previous evidence of exposure to an H5 avian influenza A virus (IAV) near a poultry production facility affected by a highly pathogenic (HP) H5 virus in Iowa, USA during 2015. We experimentally infected American robins with three clade 2.3.4.4 HP H5 viruses (H5N2 and H5N8). A total of 22/24 American robins shed virus, and all three strains were represented. The highest virus titres shed were 10^4.3, 10^4.3 and 10^4.8 PFU/ml, associated respectively with viruses isolated from poultry, a …

Social Conformity Affects Experimental Measurement Of Boldness In Male But Not Female Monk Parakeets (Myiopsitta Monachus), Kaan Kerman, Kathryn E. Sieving, Colette St. Mary, Michael L. Avery

United States Department of Agriculture Wildlife Services: Staff Publications

The standard approach for characterizing boldness rarely considers the influence of social environment on the expression of boldness in group-living animals. We studied a wild-caught, captive population of monk parakeets (Myiopsitta monachus) to investigate the impact of conspecific presence on boldness — a personality trait in monk parakeets — in a controlled environment. We quantified seven boldness metrics across three types of behavioural assay: novel object, emergence, and predator exposure tests in the presence of a companion pair of flock mates. Because of the high degree of sociality in this species, we hypothesized that the presence of companion …

Costs And Effectiveness Of Damage Management Of An Overabundant Species (Sus Scrofa) Using Aerial Gunning, Amy J. Davis, Bruce Leland, Michael Bodenchuk, Kurt C. Vercauteren, Kim M. Pepin

United States Department of Agriculture Wildlife Services: Staff Publications

Context. Management of overabundant or invasive species is a constant challenge because resources for management are always limited and relationships between management costs, population density and damage costs are complex and difficult to predict. Metrics of management success are often based on simple measures, such as counts, which may not be indicative of impacts on damage reduction or cost-effectiveness under different management plans.

Aims. The aims of this study were to evaluate the effectiveness of aerial gunning for the management of wild pigs (Sus scrofa), and to evaluate how cost-effectiveness would vary under different relationships between levels of …

Accounting For Observation Processes Across Multiple Levels Of Uncertainty Improves Inference Of Species Distributions And Guides Adaptive Sampling Of Environmental Dna, Amy J. Davis, Kelly E. Williams, Nathan P. Snow, Kim M. Pepin, Antoinette J. Piaggio

United States Department of Agriculture Wildlife Services: Staff Publications

Understanding factors that influence observation processes is critical for accurate assessment of underlying ecological processes. When indirect methods of detection, such as environmental DNA, are used to determine species presence, additional levels of uncertainty from observation processes need to be accounted for. We conducted a field trial to evaluate observation processes of a terrestrial invasive species (wild pigs‐ Sus scrofa) from DNA in water bodies. We used a multi‐scale occupancy analysis to estimate different levels of observation processes (detection, p): the probability DNA is available per sample (θ), the probability of capturing DNA per extraction ( …

Environmental Mycobacterium Avium Subsp. Paratuberculosis Hosted By Free-Living Amoebea, Ascel Samba-Louaka, Etienne Robino, Thierry Cochard, Maxime Branger, Vincent Delafont, Willy Aucher, Wilfrid Wambeke, John Bannantine, Franck Biet, Yann Héchard

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Mycobacterium avium subsp. paratuberculosis is responsible for paratuberculosis in animals. This disease, leading to an inflammation of the gastrointestinal tract, has a high impact on animal health and an important economic burden. The environmental life cycle of M. avium subsp. paratuberculosis is poorly understood and several studies suggest that free-living amoebae (FLA) might be a potential environmental host. FLA are protozoa found in water and soil that are described as reservoirs of pathogenic and non-pathogenic bacteria in the environment. Indeed, bacteria able to survive within these amoebae would survive phagocytosis from immune cells. In this study, we assessed the in …

Three Essays On Social Insurance, Jessica Ya Sun

Dissertations and Theses Collection (Open Access)

This dissertation consists of three chapters on the economics of social insurance. Each chapter explores an aspect of the evaluation and design of social insurance in terms of nutrition, healthcare and unemployment.

The first chapter, Kim, Fleisher and Sun (2016) report evidence of long-term adverse health impacts of fetal malnutrition exposure of middle-aged survivors of the 1959-1961 China Famine using data from the China Health and Retirement Longitudinal Study. We find that fetal exposure to malnutrition has large and long lasting impacts on both physical health and cognitive abilities, including the risks of suffering a stroke, physical disabilities in speech, …

Practice-Based Research Networks And The Mandate For Real-World Evidence, Elizabeth Hall-Lipsy, Leila Barraza, Christopher Robertson

Faculty Scholarship

The 21^st Century Cures Act encourages the Food and Drug Administration to consider “real-world evidence” in its regulation of the safety and efficacy of drugs and devices. Many have interpreted this mandate to focus on non-randomized observational research. However, we suggest that regulatory science must also move from rarefied academic hospitals to community-based settings, where the vast majority of patients in fact receive care in the fragmented U.S. healthcare system. This move is especially important if innovations are to reach, and be validated in, more diverse populations. A solution can be found in the 183 Practiced-Based Research Networks (“PBRN”), …

Role Of Microbes In The Development Of Alzheimer's Disease: State Of The Art - An International Symposium Presented At The 2017 Iagg Congress In San Francisco., Tamàs Fülöp, Ruth F Itzhaki, Brian J. Balin Phd, Judith Miklossy, Annelise E Barron

PCOM Scholarly Works

This article reviews research results and ideas presented at a special symposium at the International Association of Gerontology and Geriatrics (IAGG) Congress held in July 2017 in San Francisco. Five researchers presented their results related to infection and Alzheimer's disease (AD). Prof. Itzhaki presented her work on the role of viruses, specifically HSV-1, in the pathogenesis of AD. She maintains that although it is true that most people harbor HSV-1 infection, either latent or active, nonetheless aspects of herpes infection can play a role in the pathogenesis of AD, based on extensive experimental evidence from AD brains and infected cell …

Daniel Defoe's Protestant Roman Catholics. Global Religion, Colonialism, And The Limits Of Toleration In The Farther Adventures Of Robinson Crusoe, David Alvarez

English Faculty publications

In Daniel Defoe's The Farther Adventures of Robinson Crusoe (1719), the Protestant protagonist treats Roman Catholics with a friendly tolerance, which seems at odds with his violence towards idolaters. Placing the novel within the history of secularity reveals that Crusoe can tolerate Roman Catholics because their religion is represented in Protestant terms. In his global travels, an implicit Protestantism shapes his understanding of "religion," which cannot accommodate idolaters. To promote a proper form of religion that he can tolerate, Crusoe turns to violence.

Women’S Human Rights And Migration: Sex Selective Abortion Laws In The United States And India, Aziza Ahmed

Faculty Scholarship

In her compelling new book, Women's Human Rights and Migration, Sital Kalantry challenges the idea that a women's human rights framework offers a consistent and universal way to address complicated gender issues across countries. She is primarily concerned with the lives of migrant women in countries that respond to their social and cultural practices with harsh regulations designed to bring them in line with dominant ideas about gender equality. Kalantry focuses in on two issues in particular: sex-selective abortion and the veil as worn by Muslim women. Kalantry insightfully identifies a primary problem with these types of laws and …

Parkinson's Disease: Promoting Wellbeing Through Creation Health, Rupelin Pichot

DNP Research Projects

There are approximately 1.5 million Americans affected by Parkinson’s disease (PD). In spite of medications and technological advances in managing the disease, patients with PD still live poor quality lives. Therefore, effective natural interventions are essential in promoting wellbeing and quality of life among PD patients. This research study aimed to examine the usefulness and efficacy of a PD brochure designed especially for PD patients and their caregivers by utilizing CREATION Health (CH) principles to promote wellbeing and quality of life in patients with PD. This study employed mixed methods of quantitative and qualitative research designs to evaluate the design, …

Virginia Technology And Engineering Education Association 1978-2018: Celebrating Six Decades Of Progress, Ron Vickers, Philip A. Reed, George R. Willcox

STEMPS Faculty Publications

(First Paragraph) Technology and engineering education in Virginia and the nation is coming to a crossroads. Recent growth in state directives, new courses, and ever-changing funding for science, technology, engineering, and mathematics (STEM) education influences the supply of Technology Education teachers, leading to what some say is a dire future for our profession and association. This history is gathered to emphasize the importance and value of what we teach in Virginia public schools. It also captures who was involved with the association leadership over the years.

Missing In Action: A Critical Narrative Study Of The Absence Of Black Female Secondary Science Teachers, Nadia Despenza

LMU Theses and Dissertations

Despite the increasing research that lists cultural incongruence in the classroom among the top factors that speaks to the disproportionate numbers of Black females obtaining STEM degrees there is limited research on the actual number of Black female science teachers at the secondary level in education and the impact this plays on Black females in science, technology, engineering, and math classrooms (STEM). The consequence of all this is that we find ourselves with Black female science teachers “missing in action,” and only 5% of Black females receiving a STEM degree. I employ critical pedagogy, critical race theory, and Black feminist …

Takashi Murakami: Lineage Of Eccentrics, Yumi Park Huntington

Art Inquiries

No abstract provided.