State Wildlife Agencies Research Articles

Digging into Detectability: Uncovering How Temperature Influences Detection Probability of the Fossorial Temblor Legless Lizard

Abstract Knowledge of species distributions is critical for conservation, but surveying for rare, understudied species presents many challenges. A two-phase occupancy study can increase knowledge gained from early occupancy studies of a species by quickly using data from the first survey period to revise the study design for a second period. The Temblor legless lizard Anniella alexanderae is a recently described fossorial species found in the southwestern San Joaquin Valley, California, and its status is currently under review by state and federal wildlife agencies. As a fossorial species that is rarely surface active, Temblor legless lizards might be unavailable for detection at certain times of year or under inhospitable conditions (e.g., hot, dry weather), indicating the importance of accounting for false-negative surveys when determining its distribution. We used a multiscale occupancy model to disentangle detection probability, availability for detection, and occupancy for Temblor legless lizards. Focusing our effort from mid-February to mid-April when temperatures are mild and soil moisture is expected to be higher near the surface, we surveyed a total of 89 sites in 2022 (n = 60) and 2023 (n = 68) and detected Temblor legless lizards at 12 sites, including 5 new localities. Detection probability was positively related to temperature during our late winter-early spring survey period, and availability for detection was consistently high with minimal fluctuation within each year. Nevertheless, repeated surveys with nondetection can increase confidence that this fossorial lizard does not occur at a site. Temblor legless lizards were more likely to occur at sites near ephemeral streams and in areas without high clay soil content, but more investigation could help to discern drivers of occurrence. Our study provides valuable information for optimizing surveys for Temblor legless lizards and suggests promising directions for future research on this species’ ecology.

Differences between resident and nonresident hunters’ perceptions about CWD and associated implications: a case study from Colorado

ABSTRACT State wildlife agencies (SWAs) rely on hunter harvest submissions to help monitor and manage chronic wasting disease (CWD). Thus, effective CWD management is contingent upon SWAs’ understanding of hunters’ attitudes about, concerns with, and management preferences used to address CWD. We examined these and other human dimensions constructs, including trust and behavioral intentions, by surveying a random sample of resident and nonresident deer hunters who had purchased licenses in areas of Colorado where CWD had been detected. Our results suggest that regardless of residency, hunters are concerned about CWD. However, we detected substantive differences across the groups’ hunting motivations, management acceptability, and behavioral intentions. These data can help agencies develop communication strategies based on specific stakeholder motivations, concerns, and management preferences. Additionally, findings can help SWAs understand how hunting behavior may change if CWD prevalence increases, allowing them to adjust course as needed.

Local residents’ willingness to allow deer herd reduction and other CWD operations on their property

ABSTRACT Herd reduction or reducing the population density of deer in infested areas is a widely considered method to combat CWD. However, the viability of this method relies on interest and cooperation from local residents that may have different values, attitudes towards such methods. This paper summarizes key findings from a recent survey of local residents in CWD infested area in West Tennessee to explain the barriers and opportunities in securing local cooperation for this method of CWD management. State wildlife agencies and their conservation partners will benefit from these findings in designing appropriate communication, outreach and incentive mechanism towards a successful CWD management.

Predicting chronic wasting disease in white-tailed deer at the county scale using machine learning

Continued spread of chronic wasting disease (CWD) through wild cervid herds negatively impacts populations, erodes wildlife conservation, drains resource dollars, and challenges wildlife management agencies. Risk factors for CWD have been investigated at state scales, but a regional model to predict locations of new infections can guide increasingly efficient surveillance efforts. We predicted CWD incidence by county using CWD surveillance data depicting white-tailed deer (Odocoileus virginianus) in 16 eastern and midwestern US states. We predicted the binary outcome of CWD-status using four machine learning models, utilized five-fold cross-validation and grid search to pinpoint the best model, then compared model predictions against the subsequent year of surveillance data. Cross validation revealed that the Light Boosting Gradient model was the most reliable predictor given the regional data. The predictive model could be helpful for surveillance planning. Predictions of false positives emphasize areas that warrant targeted CWD surveillance because of similar conditions with counties known to harbor CWD. However, disagreements in positives and negatives between the CWD Prediction Web App predictions and the on-the-ground surveillance data one year later underscore the need for state wildlife agency professionals to use a layered modeling approach to ensure robust surveillance planning. The CWD Prediction Web App is at https://cwd-predict.streamlit.app/.

Evaluating the demand for and price elasticity of state hunting licenses in the United States using panel data

ABSTRACT As wildlife management agencies have been struggling financially, there continues to be a greater need for revenue to sustain wildlife and cover their costs. With the sales of hunting licenses playing an important role in a state wildlife agency’s revenue, there has been a debate regarding whether to raise the license fee since a loss of revenue will result if the price elasticity of the hunting license is elastic. This study first used a panel dataset containing national surveys from 1996 to 2011 across the United States to explore this issue. A General Two-Stage Least Squares (G2SLS) model was employed to estimate the demand for residents’ hunting licenses, while an Ordinary Least Squares ;(OLS) model was applied to determine the demand for nonresidents’ hunting licenses. Price elasticities of −0.176 and −0.066 for resident and nonresident hunting licenses were obtained, respectively. The results supported the view that raising the hunting license fee would bring in more license sales revenue.

An individual-based model for direct and indirect transmission of chronic wasting disease in free-ranging white-tailed deer

Chronic wasting disease (CWD) is an infectious prion disease that infects members of the Cervidae family (i.e., deer) resulting in widespread ecological, economic, and recreational ramifications. We introduce a spatially explicit individual-based model (IBM) that integrates individual deer movement and behavior with population and disease dynamics to forecast CWD in populations of free-ranging white-tailed deer (Odocoileus virginianus). We use a Susceptible-Exposed-Infectious-Dead (S-E-I-D) epidemiological framework to explore spatiotemporal dynamics of CWD within an agriculturally dominated area in Michigan, USA. The IBM results closely mimicked documented short- and long-term dynamics of white-tailed deer populations and CWD in the Midwestern, USA. We applied pattern-oriented modeling using annual apparent CWD prevalence rates reported by Midwestern state wildlife agencies to validate the disease model. The introduction of a single infected deer to the modeled landscape (93 km2) led to an outbreak of CWD in 100 out of 350 model simulations (29 %); prevalence never exceeded 1.47 % for repetitions where the outbreak ended. For the 100 simulations where disease persisted, the deer population declined by 87 % by year 50 following initial introduction of CWD. Mean (±SD) prevalence after 5, 10, 25, and 50 years was 1.1 % (±1.0 %), 3.4 % (±3.3 %), 46.5 % (±18.8 %), and 51.8 % (±18.1 %), respectively, which highly correlated (r = 0.99) with annual CWD prevalence reported in Wisconsin white-tailed deer populations for years 1–21 post initial detection. Combined with a global sensitivity analysis, the IBM indicated that prevalence of CWD at year 20 was most sensitive to harvest rate of yearling and adult female deer and least sensitive to prion shedding rate, prion half-life, and deer group numbers, indicating that deer population parameters were more influential than disease parameters on CWD dynamics. Our IBM serves as a tool to explore and better understand indirect and direct transmission of CWD within free-ranging cervid populations. Users of this model can adjust parameter values to explore how interactions among individual deer and between deer and their environment affect CWD dynamics. This IBM also serves as a framework for applying and assessing spatially and temporally explicit management scenarios.

Addressing the challenge of wildlife conservation in urban landscapes by increasing human tolerance for wildlife

Abstract Urbanization is a key driver of global environmental change and is adversely impacting wildlife populations. Human tolerance for wildlife is critical to wildlife conservation in urban areas. Using metropolitan Atlanta, Georgia, United States, as a case study, we investigated human tolerance for a range of different wildlife species. Almost half of the human–wildlife interactions that are reported to the state wildlife agency originate from metropolitan Atlanta, which is one of the fastest growing metropolises in the United States. We surveyed a representative sample of 1006 residents of metropolitan Atlanta in 2022. We found heterogeneity in respondents' tolerance for various species, although most respondents were intolerant of bobcats, coyotes, opossums and snakes. Respondents' tolerance for different species largely depended on their attitudes and emotions towards species, and their basic beliefs pertaining to wildlife and the relationships between humans and wildlife. We found some evidence that tolerance also depended on people's prior interactions with wildlife, their beliefs that they can mitigate conflicts with wildlife and their demographic characteristics. Our results suggest that communication that improves urban residents' attitudes towards wildlife and/or reinforces positive emotions towards wildlife may increase wildlife tolerance in urban areas. Read the free Plain Language Summary for this article on the Journal blog.

Exploring the relevance of the multidimensionality of wildlife recreationists to conservation behaviors: A case study in Virginia

AbstractWildlife recreationists' participation in conservation behaviors could provide key support to the conservation efforts of state fish and wildlife agencies. However, little is known about how identifying with multiple forms of wildlife recreation (i.e., hunters, anglers, birders, wildlife viewers) may influence participation in conservation behaviors, specifically for supporting state fish and wildlife agencies and their conservation goals. Using a mixed‐mode survey of Virginia wildlife recreationists, we explored the hypothesized relationship between individuals' participation in conservation behaviors and their identification with multiple forms of consumptive and nonconsumptive wildlife recreation. We found wildlife recreation identity is multidimensional, with many individuals identifying with consumptive and nonconsumptive identities simultaneously. Further, consumptive‐only recreationists (i.e., hunters and/or anglers) participated in conservation behaviors less often than nonconsumptive‐only recreationists (i.e., birders and/or wildlife viewers) and recreationists with both consumptive and nonconsumptive identities were less likely to support a state fish and wildlife agency in the future. Our findings underscore the importance of all types of wildlife recreationists, especially those with intersecting identities, as state fish and wildlife agencies work to advance conservation. Hence, developing multi‐faceted engagement strategies may enhance support for state fish and wildlife agencies among their growing wildlife recreation constituency.

The eco-munitionary subject: Conservation with and of firearms

The Pittman-Robertson Act of 1937 was a transformative piece of legislation for wildlife management and conservation in the United States, incentivizing the creation of state wildlife agencies and establishing funding mechanisms for these agencies. The legislation directs an excise tax on firearms, ammunition, and archery equipment to a fund to support wildlife restoration projects by state wildlife agencies. In 2021 alone, this generated more than $1 billion in project funds. Although commonly framed as a user pays model of conservation whereby hunters fund wildlife management, most of the excise taxes collected on firearms and ammunition are now associated with non-hunting uses. Despite this disconnect, many firearms industry groups continue to support and promote their relationship to Pittman-Robertson. Here, we examine the role of Pittman-Robertson in shaping the relationship between firearms and conservation and seek to understand how this relationship is reproduced. We examine this shifting relationship through an analysis of amendments to Pittman-Robertson since its creation and a discourse analysis of contemporary materials from web sites of firearms, hunting, shooting, and conservation organizations. Drawing on the concept of environmentality and diverse ecologies, we argue that Pittman-Robertson has contributed to the production of, and been re-shaped by, a distinct environmental actor: the eco-munitionary subject.

Drivers of support for citizen science across state wildlife management agencies in the United States.

Citizen science (CS) is gaining recognition as a valuable approach to meet data needs for environmental projects while fostering collaboration between scientists and members of the public. Despite increasing implementation of CS by natural resource entities, organizations' motivations for engaging in CS remain poorly understood. We examined the utility of the theory of planned behavior (TPB) and social exchange theory (SET) in identifying factors influencing support of CS by scientific organizations. To test predictions of the TPB and SET theories, we surveyed (quantitative, web based) state wildlife agency staff in the United States on their perceptions of organizational engagement in CS. We divided questions that measured TPB items into individual and organizational components to address the influence of personal- and organization-level decision-making on staff perceptions and attitudes. We used structural equation modeling to identify key constructs that influence staff support of CS in state wildlife agencies. The survey yielded 627 responses across 44 states. Both TPB and SET constructs accurately predicted staff support of CS; however, measures from SET (e.g., public engagement benefits and costs of CS to scientific credibility) were most influential (i.e., TPB constructs had less impact). Our findings indicate that organizational support for CS is primarily influenced by assessment of trade-offs among perceived costs and benefits. Indicators of support for CS were further elucidated by including measures from the TPB model. Based on our results, we suggest that natural resource entities give careful consideration to CS project design, develop thorough communication and data management plans, and practice iterative evaluation of CS project productivity.

Assessing White-Tailed Deer Impacts to Tree Seedling Growth using Citizen Science Data in Minnesota, USA

Abstract White-tailed deer (Odocoileus virginianus Zimmerman) present numerous challenges for maintaining the health of forests in the US Lake States. Although many sources of data exist that provide coarse estimates of deer-browse impacts on plant survival and abundance (e.g., national forest inventories) or examine areas where deer are excluded (e.g., exclosures), few studies exist that use detailed tree seedling measurements across diverse stand conditions and forest types. This study evaluated four years of citizen science data collected in the Assessing Vegetation Impacts from Deer (AVID) program in Minnesota, USA. Results showed that average annual height growth of seedlings for nine browse-palatable species was 1.9 cm. For four of these tree species, annual height growth was not significantly different from zero. These results point to the challenges for the growth and survival of browse-palatable tree species in Minnesota under current deer population levels. Engaging the public through a citizen science project such as AVID showcases the importance of evaluating browse impacts on trees from white-tailed deer while simultaneously providing information to managers and decision makers about this important conservation concern. Study Implications: Citizen scientists can collect data on important conservation issues with ecological implications. This study showcases data provided by volunteers in Minnesota’s Assessing Vegetation Impacts from Deer (AVID) program. These results showed that the growth of nine browse-palatable species grew minimally over a four-year span. Citizen science data like these can be used by state wildlife agencies to better understand forest-wildlife interactions and establish wildlife population harvest goals. Measurements of deer browse can also assist researchers by reducing the costs of data collection and providing a geographically diverse data set with detailed measurements of deer impacts to forest vegetation.

The Relationship between Wildlife Recreationists' Familiarity with State Fish and Wildlife Agencies, Recreation Identity, and Future Financial Contributions

AbstractNorth American fish and wildlife management has long been supported by the financial contributions of anglers and hunters to state fish and wildlife agencies; however, stagnation in angling participation and declines in hunting participation threaten the stability of this user‐pay support system. While engaging recreationists beyond those with consumptive interests may assist in addressing limitations of the current user‐pay benefit approach, anecdotal evidence suggests differences in recreationists' familiarity with agencies, and perceived benefits of financial contributions may dissuade certain wildlife recreationists from providing agency support. Using focus groups (n = 83) and a survey (n = 1,016) of Virginia residents, we explored how recreationists' familiarity with an agency differed among three categories of wildlife recreationists (i.e., recreation groups)—consumptive (anglers and hunters), nonconsumptive (birders and other wildlife viewers), and multi‐recreationists (those who participate in both consumptive and nonconsumptive activities)—relative to non‐wildlife recreationists (those who do not participate in fish and wildlife recreation). We further examined whether familiarity with an agency and recreation group influenced the future likelihood of financial contributions across voluntary (not required for access or use of natural resources) and user‐pay (required for access or use of natural resources) funding mechanisms. We found that consumptive recreationists and multi‐recreationists had greater familiarity with the agency than nonconsumptive recreationists. Approximately 40% of nonconsumptive recreationists were likely to support the agency through either user‐pay or voluntary mechanisms, while approximately 80% of consumptive recreationists preferred user‐pay mechanisms. Further, all recreationists expected tangible outcomes from their contributions and transparency about how their contributions would benefit their activities (e.g., newsletters detailing angling access funded by their support). We recommend that agencies build familiarity among wildlife recreationists, especially within their nonconsumptive constituency, and demonstrate how current funding mechanisms benefit and are derived from multiple recreation groups.

A call to action: Standardizing white-tailed deer harvest data in the Midwestern United States and implications for quantitative analysis and disease management

Recreational hunting has been the dominant game management and conservation mechanism in the United States for the past century. However, there are numerous modern-day issues that reduce the viability and efficacy of hunting-based management, such as fewer hunters, overabundant wildlife populations, limited access, and emerging infectious diseases in wildlife. Quantifying the drivers of recreational harvest by hunters could inform potential management actions to address these issues, but this is seldom comprehensively accomplished because data collection practices limit some analytical applications (e.g., differing spatial scales of harvest regulations and harvest data). Additionally, managing large-scale issues, such as infectious diseases, requires collaborations across management agencies, which is challenging or impossible if data are not standardized. Here we discuss modern issues with the prevailing wildlife management framework in the United States from an analytical point of view with a case study of white-tailed deer (Odocoileus virginianus) in the Midwest. We have four aims: (1) describe the interrelated processes that comprise hunting and suggest improvements to current data collections systems, (2) summarize data collection systems employed by state wildlife management agencies in the Midwestern United States and discuss potential for large-scale data standardization, (3) assess how aims 1 and 2 influence managing infectious diseases in hunted wildlife, and (4) suggest actionable steps to help guide data collection standards and management practices. To achieve these goals, Wisconsin Department of Natural Resources disseminated a questionnaire to state wildlife agencies (Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Missouri, Ohio, Wisconsin), and we report and compare their harvest management structures, data collection practices, and responses to chronic wasting disease. We hope our “call to action” encourages re-evaluation, coordination, and improvement of harvest and management data collection practices with the goal of improving the analytical potential of these data. A deeper understanding of the strengths and deficiencies of our current management systems in relation to harvest and management data collection methods could benefit the future development of comprehensive and collaborative management and research initiatives (e.g., adaptive management) for wildlife and their diseases.

The wild life of ticks: Using passive surveillance to determine the distribution and wildlife host range of ticks and the exotic Haemaphysalis longicornis, 2010–2021

BackgroundWe conducted a large-scale, passive regional survey of ticks associated with wildlife of the eastern United States. Our primary goals were to better assess the current geographical distribution of exotic Haemaphysalis longicornis and to identify potential wild mammalian and avian host species. However, this large-scale survey also provided valuable information regarding the distribution and host associations for many other important tick species that utilize wildlife as hosts.MethodsTicks were opportunistically collected by cooperating state and federal wildlife agencies. All ticks were placed in the supplied vials and host information was recorded, including host species, age, sex, examination date, location (at least county and state), and estimated tick burden. All ticks were identified to species using morphology, and suspect H. longicornis were confirmed through molecular techniques.ResultsIn total, 1940 hosts were examined from across 369 counties from 23 states in the eastern USA. From these submissions, 20,626 ticks were collected and identified belonging to 11 different species. Our passive surveillance efforts detected exotic H. longicornis from nine host species from eight states. Notably, some of the earliest detections of H. longicornis in the USA were collected from wildlife through this passive surveillance network. In addition, numerous new county reports were generated for Amblyomma americanum, Amblyomma maculatum, Dermacentor albipictus, Dermacentor variabilis, and Ixodes scapularis.ConclusionsThis study provided data on ticks collected from animals from 23 different states in the eastern USA between 2010 and 2021, with the primary goal of better characterizing the distribution and host associations of the exotic tick H. longicornis; however, new distribution data on tick species of veterinary or medical importance were also obtained. Collectively, our passive surveillance has detected numerous new county reports for H. longicornis as well as I. scapularis. Our study utilizing passive wildlife surveillance for ticks across the eastern USA is an effective method for surveying a diversity of wildlife host species, allowing us to better collect data on current tick distributions relevant to human and animal health.

Non‐resident college student hunting license regulations in the United States

AbstractA decades‐long decline in hunting participation jeopardizes state wildlife agency funding amid growing conservation and management challenges. College students are being recognized by states and non‐governmental organizations as an important population for hunter recruitment and retention, fueling a proliferation of learn‐to‐hunt programs on college campuses. Nearly 3,000,000 students attend college in a state where they are not a resident and may face constraints to hunting. We analyzed hunting license residency statutes in each state to determine whether non‐resident college students were addressed in statutes or policies, catalog statutory provisions that may exclude populations of students from hunting, and document how students' residency status affects the price of a deer and small game license. Nationwide, 29 states have statutes allowing non‐resident college students to hunt at a resident rate. Among these states, we identified a patchwork of statutory requirements for non‐resident students to be eligible for resident‐rate licenses, including waiting periods, age restrictions, credit restrictions, and unclear or onerous purchasing procedures. Non‐resident college students fell into a gray area of licensing policy in the 21 states without statutes addressing this group. In these states, students often needed to pay non‐resident hunting license rates. Hunting licenses were substantially more expensive for non‐resident college students in states without statutes addressing students, and license sales data from Montana, USA, indicated that high license prices are a constraint for student hunters. With college students becoming a focal point for hunter recruitment efforts, we identify statutory constraints to recruiting and retaining hunters on college campuses and help improve the effectiveness of learn‐to‐hunt programs on college campuses.

Informing Surveillance through the Characterization of Outbreak Potential of Chronic Wasting Disease in White-Tailed Deer

Understanding the role that an environmental prion reservoir plays in the outbreak dynamics of chronic wasting disease (CWD) in free ranging white-tailed deer (Odocoileus virginianus) is critical for the allocation of disease surveillance resources by state and provincial wildlife agencies. We hypothesized that demographic, ecological, and epidemiological configurations naturally attenuate epidemic risk despite the introduction of infectious prions into a susceptible population of deer, but the magnitude of infectious prions in the environmental prion reservoir complicate outbreak expectations. We developed a Susceptible-Latent-Exposed-Infective (SLEI) compartment model to represent the dynamics of CWD epidemics in free-ranging white-tailed deer, then used the basic reproductive ratio (R0) to pinpoint counties under which pathogenic introduction (transport of infectious bodily fluids, tissues, and carcasses through natural or anthropogenic means) naturally produced (or failed to produce) an epidemic. We found that the outlook for an epidemic hinged on transmission rates, the magnitude of environmental contamination, and system type (density-, frequency-, or density/frequency-dependent). CWD can persistently infect individuals living in a contaminated environment even if direct transmission is insufficient to sustain circulation. Theoretical results show that transmission of CWD cannot be exclusively density dependent, and must behave as either a mix between frequency and density dependent, or strictly frequency dependent. While the compartment model is a simplistic representation of reality and did not contain many complicating biological considerations, it was immediately useful in hypothesis generation, motivating the collection of additional data for use in more biologically detailed models, and in the allocation of finite surveillance resources to place emphasis on data collection in areas where an introduction of infectious prions is comparatively more likely to result in an epidemic.

Echoes of 1937: Recovering America's Wildlife Act would bring wildlife conservation funding full circle

AbstractWildlife populations face significant threats, including habitat loss and climate change. However, the United States has faced major biodiversity crises in the past. In 1937, in response to dwindling wildlife populations, Congress passed the Federal Aid in Wildlife Restoration Act, known as “Pittman‐Robertson” (PR). The law helped restore wildlife populations by establishing a federal role in funding state wildlife agencies enabling states to develop the infrastructure and expertise for effective wildlife conservation. Now, the 117th Congress is considering the Recovering America's Wildlife Act (RAWA). RAWA would provide state, tribal, and territorial wildlife agencies the funding to implement their State Wildlife Action Plans for the conservation of nongame wildlife. Herein, we explore the relationship between PR and RAWA while tracing the historical roots of PR and discussing its successes and limitations. We also demonstrate how RAWA builds upon PR and could become a generational conservation accomplishment.

A comparison of mixed‐mode survey designs for collecting deer and fall turkey harvest data in North Dakota

AbstractAchieving state wildlife agency biological goals for deer (Odocoileus spp.) and turkey (Meleagris gallopavo) rely on high quality data collection via hunter harvest surveys. Concomitantly, better information is needed to optimize harvest survey methods. From 2017 to 2019, we surveyed North Dakota, USA, deer and fall turkey hunters using a self‐administered mail survey as a control and 3 mixed‐mode, internet/mail surveys to evaluate the efficacy of alternative survey designs for estimating harvest of game populations and informing future management. We measured response rates across segments of North Dakota deer and fall turkey hunters, and across mixed‐mode treatments that could easily be implemented with existing wildlife agency resources. We also determined whether early survey respondents were more likely to harvest deer or turkey. Finally, we estimated the effects of demographic factors that may be associated with hunters returning survey treatment modes to further North Dakota Game and Fish Department's ability to tailor surveys to certain hunter groups. We found that internet‐mail and mail‐internet treatments resulted in significantly higher response rates than a traditional mail‐only survey mode. We also found that hunters who successfully harvested an animal were more likely to return questionnaires shortly after the initial wave of surveying. Finally, we found that older, nonresident, and urban hunters were more likely to return questionnaires. Our research demonstrates potential use of tailored mixed‐mode surveys to increase response rates.

Myths, Wishful Thinking, and Accountability in Predator Conservation and Management in the United States

Large predators are thought of as ecological keystone species, posterchildren of conservation campaigns, and sought-after targets of tourists and photographers. At the same time, predators kill livestock and huntable animals, and occasionally people, triggering fears and antipathy among those living alongside them. Until the 1960’s government-sponsored eradication and persecution campaigns in the United States prioritized interests of livestock producers and recreational hunters, leading to eradication of wolves and bears over much of their range. Without large predators, subsidized by changes in agricultural practices and milder winters, ungulate populations erupted, triggering negative ecological impacts, economic damage, and human health crises (such as tick-borne diseases). Shifting societal preferences have ushered in more predator-friendly, but controversial wildlife policies, from passively allowing range expansion to purposeful reintroductions (such as release of wolves in Yellowstone National Park). Attempts to restore wolves or mountain lions in the U.S. and protecting coyotes appear to enjoy strong public support, but many state wildlife agencies charged with managing wildlife, and recreational hunters continue to oppose such efforts, because they perceive predators as competitors for huntable animals. There may be compelling reasons for restoring predators or allowing them to recolonize their former ranges. But if range expansion or intentional releases of large predators do not result in ecosystem recovery, reduced deer populations, or Lyme disease reductions, conservationists who have put their reputation on the line and assured decision makers and the public of the important functional role of large predators may lose public standing and trust. Exaggerated predictions by ranchers and recreational hunters of greatly reduced ungulate populations and rampant livestock killing by large carnivores may lead to poaching and illegal killing threatening recovery of predator populations. How the return of large carnivores may affect vegetation and successional change, ungulate population size, other biota, livestock and human attitudes in different landscapes has not been appropriately assessed. Societal support and acceptance of living alongside predators as they expand their range and increase in abundance requires development and monitoring of social, ecological and economic indicators to assess how return of large predators affects human and animal and plant livelihoods.

Using statistical population reconstruction to estimate demographics of wild turkey populations

AbstractAlthough the wild turkey (Meleagris gallopavo; hereafter, turkey) is one of the most popular game species in the United States, there is no consensus on how best to monitor turkey populations. Harvest data are readily available to state wildlife agencies but are often not coupled with other datasets (e.g., hunter effort) for demographic assessments. We described the utility of statistical population reconstruction (SPR) to unite disparate datasets and effectively monitor status and trends of key turkey demographic rates at spatial scales relevant to wildlife managers. We demonstrated SPR model development and associated assumptions, model selection, and model evaluation using male‐only models for turkeys in 2 regions of Missouri, USA, and compared model output to harvest‐based and non‐harvest‐based indices. Use of SPR led to a more comprehensive assessment of population dynamics than did indices alone. Moreover, inference based solely on indices would likely have led to different interpretations of which factors govern turkey population dynamics and ultimately which management practices should be implemented. Disparity of model output between regions demonstrates importance of auxiliary data in SPR model utility. As such, we encourage well‐planned and executed auxiliary studies to improve precision of demographic rates when using SPR models. Statistical population reconstruction provides a viable, useful tool to assess demographics of turkey populations and on which to base management decisions.