Wildlife law and policy

In his seminal book Game Management (1933: 128–129), Aldo Leopold set the stage for a marriage between landscape ecology and wildlife management: The game must usually be able to reach each of the essential types each day. The maximum population of any given piece of land depends, therefore, not only on its environmental types or composition, but also on the interspersion of these types in relation to the cruising radius of the species. Composition and interspersion are thus the two principal determinants of potential abundance on game range … Management of game range is largely a matter of determining the environmental requirements and cruising radius of the possible species of game, and then manipulating the composition and interspersion of types on the land, so as to increase the density of its game population. Although Leopold did not explicitly mention landscape ecology, he definitely introduced a landscape ecological perspective to wildlife management, at a time in history when ivory-billed woodpeckers ( Campephilus principalis ) still roamed swamp forests in Louisiana. Thirty years later radiotelemetry was made generally available, opening up a new era in wildlife biology. Now wildlife managers could see for themselves how the wildlife was moving around in the landscape. Some 70 years since Leopold's book, and 40 years since radiotelemetry was introduced, what is the state of the art? Have wildlife managers grasped the concepts of landscape ecology? Have landscape ecologists found wildlife management an interesting arena in which to play out their scientific endeavors?

Predator control to enhance avian reproductive success is a controversial issue in wildlife management, yet rarely is the effectiveness of this tool evaluated with respect to the impact it has on predator populations. Understanding predator demographic responses to intense predator reduction efforts has important applied implications, and provides data to answer to public scrutiny. Medium-sized, generalist mammals (i.e., meso-mammalian) are important nest predators of the declining gamebird, the northern bobwhite, and may limit bobwhite populations. To evaluate the effectiveness of intensive predator control on influencing meso-mammal populations, we monitored 4 primary meso-mammal nest predators of bobwhites. These species include raccoon, Virginia opossum, nine-banded armadillo, and bobcat. We used scent stations to monitor predators on 4 study sites (1,300-1,400 ha each) in northern Florida and southern Georgia during 2000-2006. Baseline data were collected in 2000 for all study sites. During 2001-2003, 2 sites received intensive meso-mammal predator reduction during the 7-month bobwhite breeding season, whereas the other two sites served as controls with no reduction occurring. After 3 years, the treatments were reversed. Using predator detection at scent stations, we modeled the probability that predators used 25-ha patches across the study sites via a community occupancy model. We examined the probability of patch use between years to determine the effectiveness of predator reduction and the resilience of predator populations to management. We removed a total of 5,161 meso-mammals from our study areas. Our results show meso-mammal predator control, as done on our study area, was sufficiently intensive enough to reduce predator use across target sites, but continued reduction would be needed to reduce predator patch use between years. Our findings demonstrate that a predator community can be reduced at the local scale; however, the predators remain on the greater landscape thereby minimizing potential for negative impacts on ecosystem integrity.

Involving communities in sustainable wildlife management in tropical forests can ensure food security and livelihoods of millions of forest dwellers that depend on wild meat, and also safeguard hunted species. Mathematical models have been developed to assess hunting sustainability; but these require empirical information on reproductive parameters of the prey species, often challenging to obtain. Here, we suggest that if local people can accurately identify the reproductive status of hunted animals in the field, these data could fill the existing knowledge gap regarding species' life‐history traits and enable better assessments of hunting impacts. We first tested whether local people in 15 rural communities in three Amazonian sites could accurately diagnose, before and after training, the pregnancy status of hunted pacas Cuniculus paca, which we use as our model. We then applied the results from these tests to correct reproductive status data of hunted specimens, voluntarily collected over 17 years (2002–2018) as part of a citizen-science project in one of our study sites. We ran generalized additive models to contrast these corrected reproductive rates with those obtained from the direct analysis of genitalia by researchers, and with indices describing game extraction levels (catch‐per‐unit‐effort, CPUE, and age structure of hunted individuals). Before training, interviewees correctly diagnosed pregnancy in 72.5% of tests, but after training, interviewees accurately diagnosed pregnancy in 88.2% of tests, with high improvements especially for earlier pregnancy stages. Monthly pregnancy rates determined by hunters and by researchers were similar. Reported annual pregnancy rates were negatively correlated with CPUE, and positively correlated with the percentage of immatures in the hunted population, in accordance with an expected density‐dependent response to variations in hunting levels. Synthesis and applications. We show that the voluntary diagnosis of game species' reproductive status by local people is a feasible method to obtain accurate life‐history parameters for hunted tropical species, and to assess hunting effects on game populations. Given that almost half of the protected areas in the world are co‐managed by local people, our results confirm the potential of integrating local communities in citizen-science initiatives to ensure faster, low‐cost and more accurate data collection for wildlife management.

: Hunting in tropical forests is typically most intense near human settlements, and this creates gradients of decreasing animal densities toward those settlements. Within the context of this spatial pattern, we evaluated the status of game in the hunting grounds of an indigenous community in eastern Ecuador. We constructed a spatially explicit model of hunter‐prey interactions that mimicked the hunting in the village and included realistic animal‐dispersal rules. We compared predictions from the model with distributions of animal harvest rates and catch per unit effort of 12 game species. Six species were overharvested in part or all of the area, and two other species were probably being overharvested, although high dispersal rates complicated the interpretation. We then compared our method with methods that have been used previously. We argue that because our method provides information about the spatial extent of overharvesting, it could be particularly useful in informing decision makers about where to establish no‐take areas and could therefore aid in improving the sustainability of hunting in tropical forests.

Wildlife managers could play a greater role in ensuring that Indigenous wildlife harvesting is sustainable and helping to address community health and employment challenges facing Indigenous Australians in remote and rural areas. Wildlife managers need to listen more to what Indigenous people say they want from their country and for their people, such as increased game to supplement their diet and security for totemic species, to maintain culture. In pre-colonial Australia, adherence to customary law maintained wildlife species Indigenous Australians wanted. Today the long-term sustainability of Indigenous wildlife harvesting is threatened. Where Indigenous communities lack leadership and other social problems exist, their capacity to apply customary land-and sea-management practices and to operate cultural constraints on wildlife use is reduced. The Indigenous right to hunt should coexist with responsible management. Improved wildlife management that combines science and traditional knowledge has implications for Indigenous people worldwide. Western science can support Indigenous passion for caring for the land. It can draw on traditional Indigenous practice and, through reciprocal learning, help reinstate Indigenous law and culture in communities. In Australia, wildlife managers could be more engaged in supporting Indigenous Australians in activities such as surveying populations and estimating sustainable yields, identifying refuge areas, maximising habitat diversity, controlling weeds and feral animals, and exchanging information across regions. Although support for Indigenous land and wildlife management has risen in recent years, it remains a minor component of current Australian Government resource allocation for addressing Indigenous need. Wildlife management could be a stronger focus in education, training and employment programs. Proactive wildlife management conforms to both the western concept of conserving biodiversity and Indigenous wildlife management; it can support sustainable harvesting, provide employment and income, create learning and training opportunities and improve Indigenous health. If greater expenditure were directed to Indigenous wildlife management, wildlife managers, especially Indigenous wildlife managers, could become more engaged in cultural initiatives across traditional and scientific practices and so contribute to programs that address the health and motivational challenges facing Indigenous communities.

ascotraceR: An R Package Resource to Simulate the Spatiotemporal Spread of Ascochyta Blight in a Chickpea Field Over a Growing Season.

Advances in ecological science and increasing public environmental awareness have resulted in changes in the management of renewable natural resources. To achieve sustainable use of wildlife, managers need reliable data on populations, habitats, and the complexities of ecological interactions. The National Game Management Database (NGMD) was first mandated by the Hungarian Game Management and Hunting Law in 1996. In this paper, the authors summarize the origins, characteristics, development, and results leading to the final establishment of and uses for the NGMD. Goals of the NGMD are to store data on game populations and game management, provide input to spatial analyses and mapping, and to facilitate decision-making and planning efforts of game management administration. It contains information on the populations of game species, data from annual game management reports, trophy-scoring data, maximum allowed and minimum huntable population size, and maps and long-term game management plans for each GMU and the 24 game management regions. In Hungary, the NGMD was the first operating database in wildlife management and nature conservation providing full GIS capabilities, supporting geographical analyses.

Although monitoring population trends is an essential component of game species management, wildlife managers rarely have complete counts of abundance. Often, they rely on population models to monitor population trends. As imperfect representations of real‐world populations, models must be rigorously evaluated to be applied appropriately. Previous research has evaluated population models for white‐tailed deer (Odocoileus virginianus); however, the precision and reliability of these models when tested against empirical measures of variability and bias largely is untested. We were able to statistically evaluate the Pennsylvania sex‐age‐kill (PASAK) population model using realistic error measured using data from 1,131 radiocollared white‐tailed deer in Pennsylvania from 2002 to 2008. We used these data and harvest data (number killed, age‐sex structure, etc.) to estimate precision of abundance estimates, identify the most efficient harvest data collection with respect to precision of parameter estimates, and evaluate PASAK model robustness to violation of assumptions. Median coefficient of variation (CV) estimates by Wildlife Management Unit, 13.2% in the most recent year, were slightly above benchmarks recommended for managing game species populations. Doubling reporting rates by hunters or doubling the number of deer checked by personnel in the field reduced median CVs to recommended levels. The PASAK model was robust to errors in estimates for adult male harvest rates but was sensitive to errors in subadult male harvest rates, especially in populations with lower harvest rates. In particular, an error in subadult (1.5‐yr‐old) male harvest rates resulted in the opposite error in subadult male, adult female, and juvenile population estimates. Also, evidence of a greater harvest probability for subadult female deer when compared with adult (≥2.5‐yr‐old) female deer resulted in a 9.5% underestimate of the population using the PASAK model. Because obtaining appropriate sample sizes, by management unit, to estimate harvest rate parameters each year may be too expensive, assumptions of constant annual harvest rates may be necessary. However, if changes in harvest regulations or hunter behavior influence subadult male harvest rates, the PASAK model could provide an unreliable index to population changes. © 2012 The Wildlife Society.

The conflict between predators and humans for resources such as game species or livestock is an ancient issue, and it is especially sharp in the case of medium-large wild canids. In order to manage this conflict, lethal control methods are often used, which can sometimes be illegal, such as poisoning. As an alternative, conditioned food aversion (CFA) is a non-lethal method to reduce predation in which animals learn to avoid a given food due to the adverse effects caused by the ingestion of an undetectable chemical compound added to this food. The present study aimed to test thiram as a CFA agent in penned dogs as a first approach to use this substance for reducing the predation conflict associated with wild canids. Thiram, with or without an additional odor cue, produced CFA in penned dogs for more than 2 months. Moreover, thiram seemed to be undetectable and safe after the third ingestion of a 40-60 mg kg-1 dose. Desirable adverse effects, such as vomits, appeared around 1h after exposure. These characteristics make thiram optimal for its use in predation reduction through CFA. However, individual variability could prevent CFA acquisition by some animals. Thiram has the potential to be used as a CFA agent in wildlife management and conservation to reduce predation by wild canids. Since thiram produced CFA without the problems of detectability and toxicity caused by other substances, it may be an alternative to lethal control methods used to reduce predation on game, livestock and endangered species. © 2019 Society of Chemical Industry.

Introduction: In recent times, conflicts involving wildlife have increased in importance and magnitude. Conservation conflicts occur when two or more parties with strongly held opinions clash over conservation objectives, and when one party is perceived to assert its interest at the expense of another. Conservation conflicts usually emerge from “wildlife impacts”, defined as circumstances where people, consciously or unconsciously, negatively impact wildlife, or alternatively where wildlife negatively impacts the well-being or livelihoods of people or biodiversity. In Europe, the most frequent and intense conservation conflict associated with the management of mammals is likely that involving predators. For example, large carnivores depredate on livestock and game species, but at the same time these are flagship-species for European nature conservation. Therefore, conflicts about how these species should be managed emerge frequently. The management of overabundant ungulates that negatively impact natural vegetation as well as that of small mammals that damage crops also lead to frequent clashes between stakeholders in Europe. The global conservation status of most conflictive European mammals is rather good. However, some of their populations are threatened, at least partially by illegal killing and poaching. From this perspective, efforts are needed to mitigate conservation conflicts in these areas. In addition, promoting the investigation of conservation conflicts that incorporates multidisciplinary approaches is essential to increase the understanding of such conflicts and ultimately to mitigate them. Key words: Crop damage, hunting, large carnivores, livestock loss, overabundant ungulates, poaching, predator control, small mammals, wildlife management

The Public Trust Doctrine is the key normative premise for American wildlife management. Current interpretations suggest that natural resources, such as game species or all wildlife, are owned by the state and held in trust for the public. I argue that using the doctrine as a normative principle biases decisions in favour of consumptive uses of organisms, contrary to the field’s stated goals to employ an ecumenical normative foundation. I use the Red Cliffs Desert Reserve in Utah as a case study to illustrate how this bias manifests in practice. I also provide a new normative principle for wildlife managers.

In wildlife management it is crucial, especially for small game, to determine the real periodic populations’ growth, i.e. the changes in populations densities during one reproductive period (from reproduction to hunting season). This particularly refers to the area of R. Macedonia, where the grey partridge was and still is the main and the most numerous species of small game per total hunting, and also the most attractive game offered in hunting tourism, so that the hunting grounds managers, in their desire for quick profits, usually do not take care about the pesmissible shooting that would correspond to the real situation of its population in the field, which might lead to catastrophic consequences.Therefore, researches were conducted during the period 2007–2014 in experimental hunting ground of Faculty of Forestry from Skopje, which covers 450 ha of typical biotope for grey partridge. Data were collected through complete censuses which were conducted at least three times per week. Spring density (Sed), respectively a number of breeding pairs, was determined during period 15 February – 15 March, while an autumn density (Aed) was estimated after harvesting of the most of crops and the completion of the morphological development of the raised youth, i.e. from 10 September to 10 October every year.Real periodic population growth (Rpg) was calculated as a difference between two censuses (the autumn and spring density during the same year), but it ignores adult individuals’ mortality which could occur: Rpg=Aed/Sed Coefficient of real periodic growth per unit of breeding stock (Crpg) was calculated as: Crpg= Rpg/Sed The average value of the spring ecological density, that is, the number of breeding pairs per 100 ha in the micropopulation of grey partridges in the hunting ground Trubarevo, in the period 2007-2014, amounted to 8.89 (4.89 - 11.78), while the average real periodic growth per the same area amounted to 23.81 (7.11 - 34.44). The coefficient of the real periodic growth has been determined at 1.41, and varied within a wide range from 0.53 - 2.98 (CV = 52.47%).

trialspecies,therelativemeritsofdifferentapproachesto ensure the long-term persistence of those species remain highly contentious. Most would agree, however, that both establishing protected areas and exercising some form of restraint on extraction of forest resources are among the most effective of all viable conservation measures. Deforestation, wildfires, logging, and hunting are among the leading drivers of species losses in tropical forests, and de facto or de jure protection from these threats can be conferred by either effective enforcement of regulations or physical remoteness. Attempts to assess conservation success of protected areasatlargescaleshaverestedprimarilyonconventional use of remote sensing to quantify spatial or temporal differences in rates of change in land cover due to deforestation and wildfires, rather than on empirical demographic or community-level metrics (Gaston et al. 2008). Q2 However, the former approaches fail to detect most types of subcanopy anthropogenic disturbances that also result, directly or indirectly, in species losses (Peres et al. 2006). Moreover, the effects of habitat loss and degradation on population extirpations and declines are nonlinear, so vegetation cover alone is rarely a robust proxy for the viability of terrestrial biotas. Remotesensing data show vast tracts of apparently intact tropical forests, but in reality levels of hunting and other forms of extraction in these areas are often unsustainable (Peres & Lake 2003). Fundamental questions yet to be answered include whether ostensibly intact protected areas retain full complements of forest species and how the extent of cryptic patterns of disturbance is related to human population density in both protected and unprotected areas. I considered the global to regional emergence of sustainable-use reserves, emphasizing the world’s largest tropical forest region, Amazonia. Sustainable-use reserves often have intermediate levels of disturbance, so I examined the degree of use of natural resources by resident communities and used human population density as a proxy for level of extraction. In both protected and unprotected areas, I also estimated responses of game vertebrate assemblages to hunting on the basis of the relative biomassextractedfromasubsetoftheforestfauna.Iused analysesofcovariance(ANCOVA)toexaminetheassociationbetweenhumandensityandgamebiomassharvested across different reserve categories. Finally, I considered the long-term capacity of sustainable-use forest reserves to maintain populations of all resident species.

Forage use and availability for white tailed deer Odocoileus virginianus thomasi (Artiodactyla: Cervidae) in an experimental unit of Campeche, Mexico. In Campeche state, 122 Wildlife Conservation and Management Units have been recently conformed. In these units, eventhough the white tailed deer Odocoileus virginianus thomasi is a game species, no studies on its diet have been undertaken. The objectives of this work were to estimate the botanical composition of the diet and its seasonal change, to determine forage availability, carrying capacity and stocking rate of O. virginianus thomasi. The study was conducted in the experimental unit of Colegio de Postgraduados in Campeche, Mexico, from October 2010 to May 2012. The diet was determined through microhistological analyses of the white tailed deer feces by the use of reference material. Forage availability was determined through the Adelaide's method; the stocking rate, using the grazing pressure factor; and carrying capacity considering forage availability and 35% of utilization efficiency. In this experimental unit, the deer diet included 40 species belonging to 15 families. The highest species richness ocurred during the rainy season with 29 species. However, deers preferred shrubs during all seasons, and herbaceous species during the rainy season. The diet composition, forage availability, carrying capacity and stocking rate varied throughout the year. Carrying capacity ranged from 0.04 to 1.08deer/ha. Additional studies are required to detail about the composition of the diet, habitat availability and use throughout its geographical range, and to detail on nutritional and health aspects.

By 2050, nearly 70% of the global population will live in cities (UN, 2018), increasing the demand for urban green spaces. Urban areas are facing increasing risks from climate change, including heatwaves, flooding, wildfires, and growing social inequality, which challenges urban planning and design. Urban forests form the backbone of green infrastructure supporting resilient, equitable, and sustainable cities. Importantly, their cost-effective benefits advance sustainable development, climate action, and biodiversity conservation. Urban forests include all woody and understorey vegetation within and around dense settlements, from cultivated trees in streets, parks, and gardens to self-sustaining stands in remnant and peri-urban woodlands (FAO, 2016). As essential nature-based solutions (Cohen-Shacham et al., 2016), urban forests provide multiple ecosystem services. They help cool urban temperatures, reduce air pollution, enhance soil infiltration, slow stormwater runoff, buffer extreme weather, and support human health (Livesley et al., 2016). They contribute significantly to climate adaptation and moderately to mitigation by reducing the energy demand for cooling (McPhearson et al., 2023). Urban forests also enhance biodiversity by providing habitats and climate refugia at multiple scales (Alvey, 2006). Trade-offs in urban forest benefits, costs, and the impacts of policy interventions, such as those related to measurement, outcomes, or implementation, remain complex (Vogt et al., 2015), but the loss of canopy reduces air quality, biodiversity, and resilience to floods, droughts, pests, and extreme heat (Nowak, 2018). Canopy loss impairs recreation and impacts physical and mental health (Carrus et al., 2015). Because urban forests are inherently dynamic systems, the death or removal of large and mature trees should be anticipated through proactive planning for their replacement, including careful consideration of which species are selected and why. Unequal access drives social-environmental injustice and health inequities, which can be addressed through greenspace expansion, equitable distribution, and better management (Esperon-Rodriguez et al., 2025). Urban forests are increasingly at risk due to significant stewardship gaps. Despite the existence of international management standards, ongoing tree losses result from pests introduced through trade, climate and pollution stress, inadequate legal protections, rapid urban densification, and insufficient maintenance (Esperon-Rodriguez et al., 2022; Paap et al., 2017; Vogt et al., 2015). Planting alone cannot offset accelerated mature tree losses or replace the vital functions these trees provide over their shortened lifespans in urban environments. Closing the stewardship gap demands urgent investment, robust funding, and stronger policy to sustain diverse and resilient urban forests. Urban forests are among the most effective, equitable nature-based solutions available. When protected and resourced, they cool neighborhoods, manage stormwater, store carbon, support biodiversity, and improve health, especially in underserved communities. Yet mature tree loss outpaces replacement amid increasing climate and biological stresses. We urge COP30 policymakers to treat urban forests as essential and critical city infrastructure: safeguard mature trees, set and finance SMART canopy, diversity and access targets, mainstream urban forests in climate and biodiversity plans, and fund long-term operations, monitoring, nursery capacity, and biosecurity. Implementing this visionary action delivers cooler, healthier, more biodiverse, and more equitable cities now and for future generations. MER and MGT led the initiative and drafted the letter. All authors provided feedback, edited, and agreed with the content of the letter. All authors, except MER and MGT, are listed alphabetically. MER received funding from Western Sydney University's Research Theme Program. KDP was supported by the Research Foundation Flanders (FWO, grant 12A0L25N). RMM was supported by a Discovery Early Career Researcher Award (project DE200100649), funded by the Australian Research Council of the Australian Government. JCS received funding from the Danish National Research Foundation (grant DNRF173) and EARTHKEEPER (Global South Biodiversity Leadership Initiative). CS's contribution was funded by the National Research Foundation of South Africa (grant no 84379). We declare no conflict of interest. There are no data associated with the article.