Deer Harvest Research Articles

Unwelcomed guests: Impact of deer harvest on corn and soybean wildlife damage

While wildlife damages are a relatively small part of crop insurance claims in the United States, reported damages from wildlife are growing and producers are concerned this issue is getting worse. Wildlife agencies advocate for hunting as a control to wildlife damages to crops but to our knowledge, no study has econometrically explored if hunting could reduce crop damage. Therefore, we analyze if county-level white-tailed deer (Odocoileus virginianus) harvest and other factors like habitat and field fragmentation are associated with corn and soybean acres being indemnified due to wildlife damages in Tennessee. We estimate a fractional probit model using crop insurance data to measure crop damages and a county-level white-tailed deer harvest dataset. We find a higher coverage level of a policy increases the likelihood of both corn and soybean acres being indemnified due to wildlife damage. We also find white-tailed deer harvest during the period post-harvest in the previous crop year (November through January) slightly decreases the likelihood of a claim being made due to wildlife damage for corn but was not found to mitigate losses to soybeans. The whitetail hunting season appears to align better with corn production to reduce crop losses than with soybeans. This study will be useful for wildlife and crop agencies in state and federal governments to develop policies to more effectively utilize hunting to reduce crop insurance claims from wildlife damages.

Use of rhodamine B as a biomarker in a simulated oral vaccine deployment against bovine tuberculosis in white-tailed deer.

Free-ranging white-tailed deer (Odocoileus virginianus) in northeastern lower Michigan, (United States) are a self-sustaining reservoir for bovine tuberculosis (bTB). Farm mitigation practices, baiting bans, and antlerless deer harvests have been ineffective in eliminating bTB in white-tailed deer and risks to cattle. The apparent prevalence has remained relatively constant in deer, prompting interest among wildlife researchers, managers, and veterinarians for an effective means of vaccinating deer against bTB. The commonly used human vaccine for bTB, Bacillus Calmette Guerin (BCG), is the primary candidate with oral delivery being the logical means for vaccinating deer. We developed vaccine delivery units and incorporated the biomarker Rhodamine B before delivering them to deer to assess the level of coverage achievable. Following deployment of Rhodamine B-laden vaccine delivery units on 17 agricultural study sites in Alpena County, MI in Mar/Apr 2016, we sampled deer to detect evidence of Rhodamine B consumption. We collected a total of 116 deer and sampled them for vibrissae/rumen marking and found 66.3% (n = 77) of the deer collected exhibited evidence of vaccine delivery unit consumption. Understanding the level of coverage we achieved with oral delivery of a biomarker in vaccine delivery units to deer enables natural resource professionals to forecast expectations of a next step toward further minimizing bTB in deer.

Survival, cause‐specific mortality, and population growth of white‐tailed deer in western Virginia

AbstractUnderstanding the role of recruitment in population dynamics of white‐tailed deer (Odocoileus virginianus) is important for management. In the central Appalachian Mountains, deer are part of a largely forested ecosystem that supports 3 carnivore species thought to be capable of influencing white‐tailed deer recruitment: black bears (Urus americanus), coyotes (Canis latrans), and bobcats (Lynx rufus). Yet little is known about predation, how other environmental factors influence recruitment, or the importance of neonate survival to white‐tailed deer population performance in the region. Our objectives were to identify causes of mortality for neonates, analyze effects of landscape attributes on survival of neonates, estimate survival rates for neonates and adult female white‐tailed deer, and to model population growth trends based on current vital rates and hypothetical harvest and neonate survival scenarios. During 2019–2020, we captured 57 neonate deer in Bath County, Virginia, USA, by monitoring 38 pregnant females equipped with global positioning system collars and vaginal implant transmitters and by conducting transect searches for recently born neonates. We observed 37 neonate mortalities and identified cause of death using field and genetic evidence. Mortalities included 28 predation events and 9 deaths from other causes (e.g., abandonment, malnutrition, disease). Black bears accounted for 48.6% of neonate mortalities, and 64.2% of predation events (n = 18), followed by bobcats (n = 5) and coyotes (n = 3). Annual survival for adult female deer was 0.871 and neonate survival to 12 weeks old was 0.310. Elevation was a significant predictor of neonate survival; mortality risk increased 20% for every 100‐m increase in elevation. Models of annual population growth using observed vital rates predicted an increasing population (λ = 1.10). A 10% increase in female harvest would still result in a potential population increase of 2% (λ = 1.02), but a 20% increase in harvest rate would result in a potential 7% decline (λ = 0.93). Neonate survival was higher near fertile valley bottoms and lower along forested ridges characterized by shallow, infertile soils and limited edge or early successional forests. While predation, largely influenced by black bears, was the leading cause of neonate mortality and contributed to low neonate survival, we observed little evidence of population decline, and suggest there is opportunity for a modest increase in harvest of female deer.

Abrupt height growth setbacks show overbrowsing of tree saplings, which can be reduced by raising deer harvest

Intensive ungulate browsing significantly impacts forests worldwide. However, it is usually not single browsing events that lead to sapling mortality, but the little-researched interactions of browsed saplings with their biotic and abiotic environment. (I) Our objective was to assess the impact of ungulate browsing on the growth of young saplings relative to other environmental factors by utilizing their height increment as a sensitive measure of vitality to indicate their status. (II) Furthermore, we aimed to identify factors affecting ungulate browsing at our study sites, assessed as browsing probabilities, and identify effective mitigation measures for browsing impact. We analyzed an extensive sapling dataset of 248 wildlife exclosures, which were erected in 2016 in beech dominated forests across Germany and assessed annually until 2020. (I) Browsing probability and light availability were the most influential parameters for selectively browsed, admixed tree species (e.g., sycamore maple). Height increment showed abrupt setbacks, which caused a permanent collapse of growth when browsing exceeded a certain level. However, light availability enhanced height increment. (II) An increase in deer harvest reduced the browsing probability of selectively browsed species considerably. We conclude that the growth-inhibiting effect of ungulate browsing is a multifactorial phenomenon, which can be mitigated by silvicultural management and efficient hunting strategies.

Weather conditions affecting white‐tailed deer harvest in Iowa

AbstractWeather conditions, such as temperature and precipitation, likely influence white‐tailed deer (Odocoileus virginianus) activity and hunter participation, both of which are major factors contributing to deer harvest. Because harvest is often used to manage white‐tailed deer population trends and guide management decisions, understanding how certain abiotic factors may bias such data is important. We examined the effects of weather on deer harvest during the Iowa, USA, firearms seasons from 2006–2021 using a generalized mixed‐effects linear model. Weather conditions during the hunting season were related to overall deer harvest. Specifically, deer harvest was positively correlated with snowfall on opening day and negatively correlated with average minimum temperature, average snow depth, rainfall on opening day, and number of rainfall and snowfall days. Abiotic factors have the ability to substantially influence deer harvest. Because many white‐tailed deer population models use harvest data, incorporating the effects of weather variability into such models may substantially improve population estimates. Our study provides a compelling case for considering hunting season weather conditions when interpreting harvest data as a population index for white‐tailed deer. The results of this study also demonstrate potential for retrospective modeling of past harvest rates and incorporating the effects of abiotic factors on harvest into future age‐based population models.

Success is dependent on effort: Unraveling characteristics of successful deer and elk hunters

AbstractThe pursuit of ungulates as game animals, whether for recreation, cultural tradition, or meat, is a dominant activity on public and private lands in North America and much of the world. Strategic regulation of hunting is key for managing game population abundance, age and sex structure, and distribution, with harvest rates a function of both hunter success and participation. Hunter satisfaction is often linked to success and ultimately with hunter recruitment and retention, a growing concern for wildlife agencies. Yet knowledge is lacking about what hunter characteristics or behaviors are linked with success, and how these may differ among common hunt types. We used survey and spatial data from hunters (n = 416) during a 6‐year observational study in northeastern Oregon, USA to characterize hunter traits associated with success for 3 hunt types for antlered males: rifle deer (Odocoileus spp.), archery elk (Cervus canadensis), and rifle elk. We modeled the success for rifle deer and rifle elk hunters using logistic regression models in a Bayesian hierarchical approach. Annual success rates were highly variable, ranging from 4 to 76% for rifle deer and 20 to 56% for rifle elk hunters, and from 0 to 14% for archery elk. Age distributions of hunters were similar across hunt types ( = 47.2 years), and male hunters were ~8 times as common as females (n = 370 vs. n = 46, respectively). Success rates for men and women, however, were comparable within hunt types. Successful hunters spent more hours per day outside camp ( = 7.4 vs. 6.4 for unsuccessful hunters) and expended a slightly larger percentage of their hunting effort on foot ( = 87.8%) than did unsuccessful hunters ( = 84.6%). The best model predicting success of rifle deer hunters was based on hours per day spent outside camp during the hunting hours, with each additional hour increasing odds of success by 26%. For rifle elk hunters, the best model included time outside camp and a binary covariate for scouting. The odds of success increased by 418% for hunters who scouted versus those who did not, and by 18% with each additional hour per day spent hunting outside of camp. Summed model weights indicated that hours per day outside camp and scouting were most informative, and that use of an all‐terrain vehicle, age, and experience were unrelated to hunter success. Both models performed reasonably well (correct classification rates of 0.74 and 0.70 for rifle deer and rifle elk models, respectively). Our study augmented the relatively limited published information about behavioral factors associated with successful harvest of deer and elk, and we recommend additional research to better unravel the nexus of success and hunter characteristics and behavior to help sustain recreational hunting and big game populations.

Impact of deer management cooperative implementation on white‐tailed deer harvest behaviors

AbstractSince the early 1980s, Quality Deer Management (QDM) has been used widely to manage populations of white‐tailed deer (Odocoileus virginianus) in the United States. Since 2000, QDM has been a catalyst behind a suite of deer management cooperatives (DMCs) forming across the United States. Although QDM has grown in popularity among North American deer hunters, large‐scale implementation of multi‐landowner DMCs relies on voluntary changes to implement structured hunter harvest behavior to achieve management goals. Therefore, a national review of how DMCs influence harvest behavior of hunters and if the DMC model works to accomplish deer management goals is warranted. We assessed if DMCs change the harvest behavior of their members, and if factors such as state, motivations, and length of membership influence change in hunter behavior. Results from our survey of 459 DMC members across 5 U.S. states found that DMC members' harvest behavior changed after joining their DMC. Deer management cooperative members reported they were more likely to harvest does, less likely to harvest yearling males, and more likely to pass on the harvest of a 3.5 year old (or younger) males after joining the DMC. When analyzed at the state level, Texas and Georgia saw the largest gains in perceived hunt quality (2.5 point gain on 1–7 scale) and QDM implementation. Motivations for joining the DMC had little impact, but length of membership influenced hunt behavior with more tenured members (>5 years of membership) being more likely to follow QDM practices. Our results suggest that DMCs serve stakeholders by increasing perceived hunt quality, assisting agency personnel with non‐regulatory avenues to address management goals, and developing a community engaged with local wildlife management. Deer management cooperatives occupy the critical nexus of agency needs and private landowner deer management objectives, often at scales larger than a single private landowner, that are necessary for effectively managing wild deer populations. Although DMCs may not be widely implemented, they may address a myriad of management objectives that public and private stakeholders desire.

Examining landowners' preferences for a chronic wasting disease management program

AbstractPrivate landowners are key partners in chronic wasting disease (CWD) management, especially in landscapes where there is limited public ownership. In this study, we evaluated landowners' preferences for alternative hypothetical CWD management programs using a stated choice experiment. We were particularly interested in understanding preferences for the use of financial incentives to motivate white‐tailed deer harvest and facilitate hunter access to private lands as potential CWD management tools. We used latent class analysis to characterize preference heterogeneity among landowners stemming from patterns of choice. We compared means and distributions of auxiliary variables related to landowners' perceived risks, trust, attitudes toward management, and sociodemographics across latent classes stemming from choice model results. The pooled model demonstrated that reducing deer population density, providing payments to landowners for CWD‐positive deer taken from their property, the form of incentives for public access, and banning recreational deer feeding had a small positive effect on respondents' choice of CWD management program. However, providing financial payments to hunters for harvesting CWD‐positive deer and the use of targeted culling had the opposite effect on choice. Latent class models revealed that a majority of respondents exhibited a pattern of preference where all forms of incentives exerted a negative effect on choice, but smaller subsets of landowners positively evaluate the use of some incentives. Post‐hoc contrasts revealed relationships between patterns of preferences and trust, risk, and attitudes toward CWD management with small to medium effects. Results demonstrated limited support for the use of financial incentives as a tool to manage access and harvest in the southeast Minnesota CWD management zone.

Experience of the prefecture with hunting management influences the effectiveness of wildlife policy

AbstractOverabundant ungulate populations have impacted forestry and agricultural systems, as well as natural ecosystems, worldwide. To effectively control the sika deer (Cervus nippon) and wild boar (Sus scrofa) populations, which are currently under limited hunting pressure in Japan, we evaluated the prefectures' past management experiences with 2 wildlife laws: a prefecture‐determined management system for relaxing hunting regulations implemented in 2000 and municipality‐determined damage control system for subsidized culling implemented in 2008. Time series data (1990–2014) of sika deer and wild boar harvest per hunter for each prefecture were grouped using dynamic time warping clustering analyses. All groups of both ungulates demonstrated significant increases in harvest per hunter after implementing both laws. The prefectures with the most experience in deer management could control sika deer populations through management planning, culling supported by subsidies, and enforcement of antlerless deer harvest. The strategies are likely ineffective for controlling wild boar populations because of the lack of effective selective harvesting and limited survey methods for population monitoring. Our findings suggest that prefectures' experience in hunting management influences the success of population reduction actions for sika deer.

Adult white‐tailed deer survival in hunted populations on public and private lands

AbstractEstimates of sex‐ and age‐specific survival are important for guiding population management decisions for white‐tailed deer (Odocoileus virginianus). However, differences in deer survival between public and private lands can exist and, if unaccounted for, may affect wildlife agencies' ability to effectively manage statewide and local deer populations. From 2014 to 2016, we radiocollared and monitored survival of 79 adult white‐tailed deer (141 deer‐years; 62 male, 79 female) on 2 public and 2 private properties in Alabama, USA. We assessed the effects of sex, age, and landownership type (i.e., public or private) on adult white‐tailed deer harvest and survival patterns using an information‐theoretic approach. Hunter harvest accounted for 77% of observed mortalities (n = 23/30), but harvest and survival rates varied by sex and age. Harvest and survival were similar between public and private property despite more restrictive hunting regulations for antlered deer on public areas. Similar harvest rates were likely due to self‐imposed, quality deer management (QDM) harvest strategies on private land that emulated the effects of a state‐mandated antler point restriction (APR) on public land. Our findings indicate survival rates of adult white‐tailed deer may be applicable across landownership types where state‐mandated harvest regulations with respect to males are more restrictive on public than private property, due to the popularity of QDM by private‐land deer hunters. However, where regulations are similar across landownership types (e.g., no state‐mandated APR), differences in harvest and survival rates may exist.

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 effectiveness of antler point restrictions to achieve management goals

Stakeholder input is part of the decision-making process in wildlife management but reaching a decision that satisfies everyone may be impractical when stakeholders are divided on a particular issue or regulation. Antler point restrictions for white-tailed deer (Odocoileus virginianus) are intended to protect yearling males from harvest by hunters. Still, stakeholders debate the value of using antler restrictions to achieve harvest goals. In 2013, Michigan implemented antler point restrictions in 12 counties in the northwest area of the state. Using a series of piecewise regressions and annual harvest data from 23 counties in Michigan, we tested the hypotheses that antler point restrictions caused a change in the age structure of harvested male deer (H1), antlerless harvest (H2), and hunter numbers (H3). We found support for H1, but we did not find support for the other hypotheses. Based on our results, antler point restrictions would be a useful tool where the management goal is to advance the age structure of the male segment of the white-tailed deer harvest. However, we found no evidence that implementing antler point restrictions would help managers increase the antlerless harvest or recruit more hunters to the area. Therefore, managers might consider using antler point restrictions to reduce the harvest of yearling males, but these regulations are unlikely to have notable or lasting impacts on antlerless harvest or hunter numbers.

Fallow Deer (Dama dama) Population and Harvest Changes in Europe since the Early 1980s

Fallow deer is one of the most common and widespread cervid species in Europe. To make informed management decisions on any scale, it is essential to have long-term data on the abundance of populations and their harvest. We provide missing information on the changes and status of fallow deer populations in Europe and analyse the relationships between population and harvest changes using a numerical approach. To conduct our analyses, we collected national statistical data on population sizes and hunting bags for all European countries for four periods: 1984, the mid-2000s, mid-2010s, and early 2020s. The fallow deer population increased five-fold from 1984 to the early 2020s and the harvest increased six-fold in the same period. Although the correlations between the population growth rate and harvest growth rate are not strong, removing outliers strengthened the correlation. This indicates that the hunting effort increases as the population increases. Overall, the lack of some data shows that consistent, reliable data collection (monitoring programs) is needed to efficiently manage the increasing fallow deer populations as a renewable natural resource and mitigate the potential negative impacts in a holistic and responsible manner.

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.

Balancing carnivore conservation and sustainable hunting of a key prey species: A case study on the Florida panther and white‐tailed deer

Abstract Large carnivore restoration programs are often promoted as capable of providing ecosystem services. However, these programs rarely measure effects of successful restoration on other economically and ecologically important species. In South Florida, while the endangered Florida panther Puma concolor coryi population has increased in recent years due to conservation efforts, the population of its main prey, the white‐tailed deer Odocoileus virginianus, has declined in some regions. The extent to which panther predation has affected deer populations has been difficult to assess because several other factors have changed during this period, including hydrology and hunting regulations. We collected known‐fate survival data on 241 GPS‐collared adult deer (156 females and 85 males) from 2015 to 2018 in the Florida Panther National Wildlife Refuge and the Big Cypress National Preserve in Florida, USA, to assess effects of panther predation on the deer population, while also evaluating the impacts of hunting and hydrology. Predation was the primary cause of death (110 of 134 mortalities), and 87% of predation events were attributed to panthers, a much greater rate than reported by studies conducted before the panther genetic restoration effort initiated in 1995. One deer was legally harvested, and two were likely killed by poachers. Increasing water depth decreased female survival but had little impact on male survival, and drowning was never a cause of mortality. Females had greater survival probability than males, except during fawning season. From 2015 to 2018, annual survival rates increased from 0.61 (0.52–0.70) to 0.86 (0.79–0.91) for females, and from 0.45 (95% CI: 0.33–0.58) to 0.79 (0.69–0.86) for males. Synthesis and applications. High predation rates, coupled with previous evidence of low recruitment of deer in South Florida, suggest that it will be challenging to meet society's competing demands for large predator restoration and sustainable deer harvest. Deer hunting in the area must remain tightly controlled, for now, if it is to be sustainable, and managers should seek to mitigate effects of high waters and improve deer habitat quality to increase deer population viability. Future work should closely monitor the deer population to assess if management actions can increase vital rates and abundance in the context of high predation rates.

Potential Futures for Coastal Wolves and Their Ecosystem Services in Alaska, With Implications for Management of a Social-Ecological System

Carnivores across much of the world are declining, leading to loss of biodiversity as well as the ecosystem services carnivores provide. In 2020, the Alexander Archipelago (AA) wolf was petitioned for protection under the U.S. Endangered Species Act (ESA) for the third time in 30 years. Concerns included habitat alteration from industrial timber harvest and subsequent declines in prey (deer), human-caused mortality, climate change, and genetic inbreeding. However, the underlying biogeography and ecology of these wolves continues to suggest resiliency across the subspecies’ range, even though local populations may go extinct. If local wolf populations go extinct, it will result in loss of their ecosystem services (e.g., interactions of wolves with their prey, which prevents over-browsing and protects carbon sequestration in soils and trees), which will likely have major consequences for the local social-ecological system. Here, we updated a model we constructed for the last ESA listing process (2015) to examine the dynamics of wolf and deer populations on Prince of Wales Island (the primary geographic focus of all three petitions) in response to future environmental and management scenarios developed with stakeholders. Further, we considered how changes in deer abundance impact predation services (prevention of over-browsing by deer). We found that wolf populations generally persisted over 30 years, but dropped below an effective population size of 50 wolves in 10–98% of years simulated. Low wolf abundance resulted in higher deer abundance, which increased hunting opportunity, but also browsing damages (e.g., 19% of areas would be over-browsed if wolf harvest caps are removed, and >30% of areas would be over-browsed if wolves go extinct). Human harvest of wildlife was a key regulator of abundance and ecosystem services within the coastal rainforest social-ecological system; wolf abundance was most affected by wolf harvest regulations; and deer harvest restrictions increased wolf and deer abundances, but also greatly increased browsing impacts (>70% of areas heavily browsed if hunting ceased). Our findings support an integrated approach to management of this social-ecological system, such that social and ecological sciences are both used to monitor important components of the system (e.g., measuring public sentiment and likelihood of poaching, alongside wolf and deer numbers). Integration and adaptive approaches are needed to ensure that the many ecosystem services humans depend on are valued, conserved, and restored, including the cryptic predation services wolves have historically provided to the timber industry via reduced browsing pressure by deer.

Exploring Public Support for Large-Scale Commercial Axis Deer Harvests in Maui, Hawaii

Commercial harvests have been effectively employed to manage wildlife populations across the world. Although commercial harvesting of the nonnative, invasive axis deer (Axis axis) in Maui, Hawaii, occurs at small scales and only on private lands, there is potential for large-scale implementation to be used as a population management tool. To investigate local stakeholder interest in a hypothetical, large-scale commercial harvest of axis deer, we used an online survey of individuals and businesses in Maui to analyze their attitudes towards axis deer populations and management, their experiences with axis deer, and potential to utilize axis deer venison and products, as relevant. We found evidence of public support for commercial harvesting to be employed as one of the many tools available to manage axis deer populations. Additionally, we documented support on both the supply-side and demand-side for axis deer-derived products that may be available if large-scale commercialized harvesting were implemented. We leverage these results to contribute to conversations about commercial wildlife harvesting in the United States by challenging assumptions that the practice is inconsistent with the public’s perceptions of the North American Model of Wildlife Conservation and suggesting policies and programs that would ease axis deer commercial harvest growing pains.

Bayesian modelling reveals differences in long-term trends in the harvest of native and introduced species by recreational hunters in Australia

Context Little is known about wildlife harvesting by licensed recreational hunters in Australia, where both native and introduced species are hunted. It is important to understand harvest trends to assess sustainability for native species and implications for population control of introduced species. Aim The aim of this study was to analyse trends in hunter participation, activity and efficiency, and wildlife harvest, including effects of climate, in Victoria, Australia, for three game species groups: introduced deer, native waterfowl (ducks) and one native grassland species, stubble quail (Coturnix pectoralis). Methods Telephone surveys of a random sample of licenced Victorian hunters were performed annually from 2009 to 2019. Hunters were asked to quantify their hunting effort and the number of animals harvested. The respondents’ answers were analysed to estimate measures of hunter success, activity and efficiency. Bayesian modelling was applied to these data, accounting for changes over time, differences between survey periods for all licence types, and random effects for over-dispersion. The effect of climate on game bird hunter activity and harvest was estimated, as measured by the El Niño-Southern Oscillation (ENSO). Results Over 11 years, annual deer harvest (all species) increased exponentially, at a mean annual rate of 17% (95% credible interval: 14–21%), and the number of deer hunters increased at 8% (5–11%). In contrast, for ducks and stubble quail, hunter numbers remained relatively unchanged, with no evidence of consistent change to total harvests over time, unrelated to changes in environmental conditions or regulations. The annual duck harvest was influenced by ENSO and hunting regulations. The annual stubble quail harvest exhibited ‘boom-and-bust’ dynamics, with an exceptionally large harvest immediately after a La Niña season. Conclusions Long-term monitoring of harvest trends in south-eastern Australia revealed stark differences between introduced deer and native birds: harvest of deer increased rapidly whereas equivalent rates for game birds were either stable or declining. Seasonal effects had a strong influence on game bird harvest. Environmental and regulatory conditions were influential for harvest outcomes for ducks and stubble quail. Implications This study filled a key knowledge gap around managing harvesting of game species, but increased scrutiny is warranted in this field.

Effects of Antler Point Restrictions on Deer Harvest in New York

ABSTRACTManaging game species can require balancing multiple social and conservation goals. For many game species, including white‐tailed deer (Odocoileus virginianus), harvest is the primary tool for management of population abundance. Hunter interest in harvesting older male deer has encouraged managers to find ways to protect younger deer and recruit them into older age classes. Antler point restrictions (APRs) that protect some yearling antlered deer from harvest can be implemented to increase the availability of older, larger‐antlered deer for hunters. The New York State Department of Environmental Conservation (DEC) implemented mandatory APRs in 2 adjacent areas of the state, one beginning in 2005 and the other in 2012. We predicted that APRs would decrease the proportion of yearling antlered deer in the harvest. We also predicted that APRs might result in an increase in the harvest of antlerless deer and harvest success on Deer Management Permits (DMPs), which are permits issued by the DEC that allow harvest of antlerless deer and are used to manage deer population size. We collected harvest information during 2003–2016 from the 2 areas with APRs and from adjacent areas that did not have APRs. The proportion of yearlings in the harvest was initially 51% and 58% in the 2005 and 2012 APR areas, respectively, and declined to 13% and 19% respectively after 5 years. Antler point restrictions did not affect the harvest of antlerless deer or DMP success. Although APRs successfully reduced the proportion of yearlings in the antlered harvest, we also observed a smaller decline (from 62% to 45%) over the same time period in the proportion of yearlings in the harvest in areas adjacent to the 2005 APR. © 2021 The Wildlife Society.

Assessing Lead Exposure in Free-Ranging Gray Wolves (Canis lupus) in Minnesota, USA

The gray wolf (Canis lupus) is both an apex predator and a scavenger in Minnesota, US. Monitoring the health of Minnesota's gray wolf population is an important component of wolf management. Concern regarding whether wolves are being exposed to lead through scavenging viscera of hunter-harvested cervids left on the landscape, led to our study to determine lead-exposure rates. In fall 2012, livers from 147 hunter-harvested wolves (89 females, 58 males) were screened for lead and 20 other elements by inductively coupled plasma-atomic emission spectroscopy. Ten wolves (6.8%) were exposed to lead; only one had high enough exposure (6.14 ppm) to suggest lead toxicosis. Lead exposure varied by time of harvest, with nearly all lead-exposed wolves taken in the late hunting and trapping season (from 24 November 2012 to 31 January 2013), compared with the earlier hunting-only season (3-18 November 2012). Further, eight of 10 lead-exposed wolves were taken from deer-permit areas that harvested >1 deer/km2; only two of 10 were taken where deer harvest was less. This suggests the availability of viscera on the landscape may influence exposure risk of lead to wolves. More research is needed to determine baseline levels for toxic concentrations of lead in gray wolves and to determine clinical signs of lead poisoning in wild canids.