Wildlife Reintroduction Research Articles

Applying Reiss’ expectancy theory to locals’ perceptions of a potential red wolf reintroduction to Ozark National Forest, AR

ABSTRACT Although perceptions of risk related to wildlife have been well-studied, little research has evaluated the root causes of these perceived risks. Using a semi-structured instrument, we interviewed 20 interested parties who reside and/or recreate near Ozark National Forest, Arkansas, to explore perceptions of a potential red wolf (Canis rufus) reintroduction to the region. We employed Reiss’ (1991) expectancy theory to identify cause and effect relationships between previous conditioning events interested parties had experienced (i.e. sensitivities) and perceived risks related to the reintroduction (i.e. expectancies). We found respondents drew parallels to previous events including the red wolf reintroduction to North Carolina, other wildlife reintroductions in Arkansas, gray wolf (Canis lupus) reintroductions in Yellowstone National Park, and conflicts with other wildlife in Arkansas, where distrust for wildlife agencies underpinned these experiences. Based on our findings, we recommend agencies preemptively build trust and practice clear and frequent communication among interested parties when reintroductions are being considered.

Biological response to Przewalski’s horse reintroduction in native desert grasslands: a case study on the spatial analysis of ticks

BackgroundReintroduction represents an effective strategy for the conservation of endangered wildlife, yet it might inadvertently impact the native ecosystems. This investigation assesses the impact of reintroducing endangered Przewalski's horses into the desert grassland ecosystem of the Kalamaili Nature Reserve (KNR), particularly its effect on the spatial distribution of ticks. In a 25 km2 core area of Przewalski's horse distribution, we set up 441 tick sampling sites across diverse habitats, including water sources, donkey trails, and grasslands, recording horse feces and characteristics to analyze the occurrence rate of ticks. Additionally, we gathered the data of 669 fresh feces of horses. To evaluate the spatial dynamics between these feces and ticks, we used methods such as Fixed Kernel Estimation (FKE), Moran’s I spatial autocorrelation index, and Generalized Linear Models (GLM).ResultsThe dominant species of ticks collected in the core area were adult Hyalomma asiaticum (91.36%). Their occurrence rate was higher near donkey trails (65.99%) and water sources (55.81%), particularly in areas with the fresh feces of Przewalski's horses. The ticks’ three risk areas, as defined by FKE, showed significant overlap and positive correlation with the distribution of Przewalski's horses, with respective overlap rates being 90.25% in high risk, 33.79% in medium risk, and 23.09% in low risk areas. Moran's I analysis revealed a clustering trend of the fresh feces of Przewalski's horses in these areas. The GLM confirmed a positive correlation between the distribution of H. asiaticum and the presence of horse fresh feces, alongside a negative correlation with the proximity to water sources and donkey trails.ConclusionsThis study reveals the strong spatial correlation between Przewalski's horses and H. asiaticum in desert grasslands, underlining the need to consider interspecific interactions in wildlife reintroductions. The findings are crucial for shaping effective strategies of wildlife conservation and maintaining ecological balance.

Assessing ecological and socio‐political factors in site selection for ocelot reintroduction in Texas

AbstractWildlife reintroduction site selection requires the consideration of not only a species' ecology but also socio‐political factors that may impact conservation efforts. These socio‐political dimensions may be especially important for endangered carnivore reintroductions on private lands in the United States, where landowner support for the reintroduction is a necessity given landowner concerns about ecological and legal impacts of carnivore restoration. We designed an assessment to identify potential sites for reintroduction of the federally endangered ocelot (Leopardus pardalis pardalis) in Texas, a state where over 97% of lands are privately owned. We incorporated International Union for Conservation of Nature recommendations into a geospatial analysis evaluating potential reintroduction sites based on site size, ecological and life history requirements of ocelots, potential natural and anthropogenic threats, and the socio‐political context of each site. We identified the five highest‐ranking sites that had species‐specific suitable landscape structure of woody cover, fine‐scale vegetative cover, minimal natural and anthropogenic threats, and that present land ownership patterns that are logistically feasible for conservation planners to navigate. Our assessment provided information for ocelot conservation planning and established a framework for incorporating private land data into large‐scale assessments of wildlife reintroduction sites on private lands.

Bison and bighorns: Assessing the potential impacts of reintroducing a large herbivore to a mountainous landscape.

The reintroduction of wildlife can have significant ecological impacts by altering the flow of energy in food webs. Recently, plains bison were reintroduced to part of Banff National Park after a 150-year absence. The large herbivore's reintroduction was expected to have far-reaching effects on the ecosystem due to its significant energy requirements and interactions with habitat and other sympatric species. This study explores the impacts of bison reintroduction on the movement and resource use of another large-bodied grazer, the Rocky Mountain bighorn sheep. Between 2018 and 2021, we collected data from GPS collars fit on 39 bighorn sheep and 11 bison. We analyzed home range patterns, resource selection, and interactions to investigate the potential for interspecific competition, facilitation, and resource complementarity. At the population level, bison and bighorn sheep exhibited low levels of spatial overlap and there was strong evidence of resource separation in all seasons. Interactions between species did not appear to affect sheep movement rates; however, we did see differences in forage selection patterns for sheep with overlapping home ranges with bison. Collectively, results did not support the potential for competition or facilitation between bison and bighorn sheep and instead provided the strongest evidence of complementarity.

Positive but un-sustained wildlife community responses to reserve expansion and mammal reintroductions in South Africa

The creation and expansion of protected areas, coupled with wildlife reintroductions, are increasingly used as conservation measures to combat wildlife declines worldwide. Although these types of restoration efforts are expected be beneficial to wildlife populations, variable species management and interactions among species within complex food webs have the potential to lead to unintended species-specific responses to reserve expansion which can counteract the anticipated positive effects. We used a multi-season camera trap study to investigate community-wide responses of wildlife to a reserve expansion and associated wildlife releases in South Africa. We analyzed the camera trap data using community occupancy and N-mixture models to assess how the occupancy and intensity of use of individual species changed in the four seasons following reserve expansion. We found species-specific responses to reserve expansion, although responses were generally positive in occupancy and intensity of use but un-sustained. The apex predator, the lion (Panthera leo) and the majority of managed herbivores exhibited sustained or delayed positive responses, whereas most subordinate predators and unmanaged herbivores had short-lived, fluctuating, or neutral responses. Interactive effects of top-down suppression, competitive pressure, and increased space and food resources likely resulted in the temporally-variable responses of most species. Although no species responded negatively to reserve expansion and mammal reintroductions, the lack of sustained positive responses for most species indicates the complexities of implementing conservation actions to benefit multiple wildlife species. Our results highlight the importance of monitoring the entire wildlife community following management actions such as reserve expansion or wildlife reintroductions.

Should individual animals be given names in wildlife reintroductions?

AbstractIndividual animals are often given names by humans. For example, names are attributed to domestic animals to acknowledge their closeness to people, some research studies use names to identify differences between individuals in a study group, or zoos often use names to tell stories that attract public or media attention.Publicly naming individual animals can provide opportunities in conservation, but there are also risks. In this perspective we exemplify such opportunities and risks in the context of wildlife reintroductions. We draw on examples and observations from our experience researching Eurasian beaverCastor fiberreintroduction in England, to encourage careful thinking before publicly attributing a name to an individual in reintroduction projects.Naming individuals in reintroduction can: be a low‐cost engagement tool; help people relate to unfamiliar reintroduced species; encourage local ownership of reintroduction projects; enable an effective tool for communicating information about the species and ways to coexist; or support creative or cultural expression.Yet naming individuals in reintroduction could: risk misrepresentation of natural species characteristics; make it challenging to normalise the sense that the reintroduced species is a wild animal; unintentionally imply that humans have ownership or power over the animal; cause distraction from establishing viable populations due to focus on the individual; or result in human investment in individual animals, which may have influence on reintroduction outcomes if that animal later comes to harm or dies (naturally or otherwise).Synthesis and Applications. We argue there is more to the act of naming individuals than may first appear. If considering doing so, we call for careful thought about whether it is appropriate and how to go about it. While we intentionally refrain from concluding whether ‘to name or not to name’, we call for careful, informative, message framing that takes advantage of the opportunities and is prepared for future circumstances, when naming of individuals does take place.Read the freePlain Language Summaryfor this article on the Journal blog.

Eurasian beavers in Central Italy: perceptions in the local community

According to the IUCN guidelines, wildlife reintroduction should consider any impacts on humans within feasibility assessments. Eurasian beavers Castor fiber are recovering across their native range, due to protection laws and reintroductions. In Central Italy, a self-sustaining, naturalised population of Eurasian beavers has been identified in the last five years. A questionnaire to measure whether and how citizens in the local area perceive the presence of the beaver was administered to 1114 respondents. We observed a comprehensive awareness of the presence of the beaver in Italy and a high ability to distinguish it from non-native coypus Myocastor coypus (92.3%). We also recorded a general high knowledge of issues related to the presence of the beaver (i.e., potential effects on indigenous biodiversity). The majority (65.5%) of the surveyed population was in favour of reintroducing the beaver in Central Italy, and only 1.2% was firmly against it. The majority of interviewed people was against the removal of beavers from Central Italy (65.8%), whereas only 3.7% was in favor, citing fears of perceived impacts on the river, crops, and fish populations.

Stakeholder perspectives on the prospect of lynx Lynx lynx reintroduction in Scotland

Abstract Conservation translocations are complex and challenging, but are frequently employed to tackle biodiversity decline. Large predator translocations can be particularly emotive and contentious, in part because they present actual or perceived risks to the safety and livelihoods of people. Understanding the social feasibility of conservation translocations is imperative, and provides opportunities to identify and address these risks. In Britain, the Eurasian lynx Lynx lynx is the most frequently raised prospect for large carnivore reintroduction. We used Q‐Methodology to explore stakeholder perspectives on the prospect of lynx reintroduction to Scotland. We identified five perspectives: Lynx for Change was supportive of lynx reintroduction, feeling that lynx could facilitate ecosystem restoration. Lynx for Economy was also supportive, anticipating economic benefits to local communities. No to Lynx was strongly opposed, perceiving that humans were fulfilling the roles of absent large carnivores. Scotland is not Ready supported the conversation but perceived prohibitive socio‐ecological barriers. We are not Convinced was not satisfied that an adequate case for biodiversity gain had been made, but was open to further exploration of the potential. There were important areas of divergence among the perspectives over the potential impacts on sheep farming and the degree to which environments should be managed by people or encouraged to self‐regulate. There was a consensus on a lack of trust between stakeholder groups, which was primarily rooted in participants' experiences of previous wildlife reintroductions and the contemporary management of recovering predators. However, there was also consensus that, should lynx reintroduction continue to be explored, a participatory, cross‐sectoral approach could address these trust issues, help manage existing and emergent conflicts, and build knowledge collaboratively. We provide a foundation for future dialogue between stakeholders over the prospective reintroduction of the lynx to Scotland and recommend a stakeholder‐focused participatory process as the next step. Our findings have wider relevance for wildlife reintroductions, species recovery and conservation conflicts elsewhere. Read the free Plain Language Summary for this article on the Journal blog.

Learning to live with reintroduced species: beaver management groups are an adaptive process

In anthropogenic landscapes, wildlife reintroductions are likely to result in interactions between people and reintroduced species. People living in the vicinity may have little familiarity with the reintroduced species or associated management, so will need to learn to live with the species in a new state of “Renewed Coexistence.” In England, Eurasian beavers (Castor fiber) are being reintroduced and U.K. Government agencies are currently considering their national approach to reintroduction and management. Early indications are this will include requirement for “Beaver Management Groups” (BMGs) to engage with local stakeholders. This policy paper reports on qualitative research that captured lessons from the governance of two existing BMGs in Devon (south‐west England), drawing on both a prior study and new interview data. Through the analysis, we identified that BMGs are not a fixed structure, but an adaptive process. This consists of three stages (Formation, Functioning, and Future?), influenced by resource availability and national policy direction. We argue that, where they are used, Species‐specific Management Groups could provide a “front line” for the integration of reintroduced species into modern landscapes, but their role or remit could be scaled back over time and integrated into existing structures or partnerships to reduce pressure on limited resources, as knowledge of reintroduced species (such as beaver) grows and its presence becomes “normalized.” There must be sufficient flexibility in forthcoming policy to minimize constraint on the adaptive nature of BMGs and similar groups for other reintroduced species, if they are to facilitate a sustainable coexistence.

Providing baseline data for conservation-Heart rate monitoring in captive scimitar-horned oryx.

Heart rate biologging has been successfully used to study wildlife responses to natural and human-caused stressors (e.g., hunting, landscape of fear). Although rarely deployed to inform conservation, heart rate biologging may be particularly valuable for assessing success in wildlife reintroductions. We conducted a case study for testing and validating the use of subcutaneous heart rate monitors in eight captive scimitar-horned oryx (Oryx dammah), a once-extinct species that is currently being restored to the wild. We evaluated biologger safety and accuracy while collecting long-term baseline data and assessing factors explaining variation in heart rate. None of the biologgers were rejected after implantation, with successful data capture for 16-21months. Heart rate detection accuracy was high (83%-99%) for six of the individuals with left lateral placement of the biologgers. We excluded data from two individuals with a right lateral placement because accuracies were below 60%. Average heart rate for the six scimitar-horned oryx was 60.3 ± 12.7bpm, and varied by about 12bpm between individuals, with a minimum of 31bpm and a maximum of 188bpm across individuals. Scimitar-horned oryx displayed distinct circadian rhythms in heart rate and activity. Heart rate and activity were low early in the morning and peaked near dusk. Circadian rhythm in heart rate and activity were relatively unchanged across season, but hourly averages for heart rate and activity were higher in spring and summer, respectively. Variation in hourly heart rate averages was best explained by a combination of activity, hour, astronomical season, ambient temperature, and an interaction term for hour and season. Increases in activity appeared to result in the largest changes in heart rate. We concluded that biologgers are safe and accurate and can be deployed in free-ranging and reintroduced scimitar-horned oryx. In addition to current monitoring practices of reintroduced scimitar-horned oryx, the resulting biologging data could significantly aid in 1) evaluating care and management action prior to release, 2) characterizing different animal personalities and how these might affect reintroduction outcomes for individual animals, and 3) identifying stressors after release to determine their timing, duration, and impact on released animals. Heart rate monitoring in released scimitar-horned oryx may also aid in advancing our knowledge about how desert ungulates adapt to extreme environmental variation in their habitats (e.g., heat, drought).

An integrated modeling approach for considering wildlife reintroduction in the face of climate uncertainty: A case for the North Cascades grizzly bear

As Earth faces a crisis of biodiversity loss, reintroduction of imperiled species has become an important tool toward mitigating extirpation. Current habitat quality for a reintroduced species may change dramatically under future climate scenarios, undermining or supporting species conservation efforts. Models designed to understand such change must consider the niche plasticity of a species to assess the costs and benefits of reintroduction. We integrated spatially-explicit individual-based population models with a dynamic vegetation model, using combinations of global climate models and greenhouse gas scenarios to better understand potential future carrying capacity for grizzly bears in the North Cascades Ecosystem (NCE). We estimated the ecosystem could support a grizzly bear population under several climate change scenarios through the 2080s, with the amount of high quality habitat increasing across all models, scenarios, and time periods, as compared to current conditions. Projected future habitat quality remained consistent or increased slightly along the eastern portion of the ecosystem, and increased along its central and western portions, for a net increase in high quality habitat through time. At the most plausible female home range size of 280 km2, we estimated carrying capacity would increase from a baseline of 139 female bears to 241–289 female bears. Estimated changes in habitat over time could increase grizzly bear density to 20–22 bears/1000 km2 (males and females) from the previous estimate of 17 bears/1000 km2. Species with broad ecological niches (i.e., generalists), such as grizzly bears, may be especially good candidates for reintroduction efforts in some ecosystems. Our integrated model structure provides an innovative tool for advancing reintroduction initiatives while considering some long-term risks for species.

Drivers of habitat quality for a reintroduced elk herd

Understanding spatiotemporal variation in habitat quality is essential for guiding wildlife reintroduction and restoration programs. The habitat productivity hypothesis posits that home range size is inversely related to habitat quality. Thus, home range size may be used as a proxy for habitat quality and can identify important land cover features for a recovering species. We sought to quantify variation in home range size across the biological cycle (seasons) for a reintroduced elk (Cervus canadensis) population in southwestern Virginia, USA and quantify habitat quality by linking home range sizes to the land cover types they contain using linear mixed-effects models. We found mean home range size was largest during late gestation for female elk. Additionally, throughout the year, smaller home ranges were associated with larger proportions of non-forested habitats whereas forested habitats were generally the opposite. However, both presumed poor- and high-quality habitats influenced female elk space use. Our approach revealed spatial variation in habitat quality for a recovering elk herd, demonstrated the importance of non-forested habitats to elk, can guide decisions regarding the location of future elk reintroduction programs, and serve as a model for evaluating habitat quality associated with wildlife reintroductions.

Human Dimensions of the Reintroduction of Brazilian Birds

People's acceptability for wildlife, stakeholders' engagement and involvement are acknowledged as key factors for the success of wildlife reintroduction projects. We analyzed the main National Action Plans (NAPs) (the Brazilian management participatory instrument for the conservation of endangered species) for eight bird species and conducted an online questionnaire with researchers and practitioners involved in those species reintroduction programs. The assessment of the main Brazilian bird's reintroduction programs showed that, in general, efforts have been made to integrate local people into it. Nevertheless, the actions were disconnected, isolated and fragmented. A formal protocol, designed, discussed and approved by experts aiming to address the human dimensions (HD) of human-bird interactions (HBI), preferably to be used in each stage of the reintroduction programs, was not found. Actions considered related to human dimensions are mainly under the umbrella of environmental education interventions or campaigns, more directed to children and youth; correspond to activities performed by locals with the birds and/or captive birds facilities; or, fostering artcraft production or bird watching activities. The weak or sometimes absent human dimensions approach to this important conservation tool may indicate either the novelty for Brazilian researchers and managers of the science of human dimensions within the field of wildlife management or the lack of dialogue between natural and social sciences when wildlife conservation is at stake. Reintroductions are expensive, sensitive, and labor-intensive processes. It becomes necessary due the conservation status of the species and its implementation follows a careful research of biological, ecological and socio-institutional regional background that identifies the drivers of species extinction and plans according to it. Understanding and predicting people's behaviors and its triggers are paramount to successful reintroduction projects. Thus, making use of well-planned HD studies in HBI may be the watershed between success or failure of reintroduction programs. This study was a pioneer initiative of its kind and it aimed to provide sound recommendations for managers, researchers and practitioners to acknowledge the relevance of HD and its core role in the reintroduction of endangered bird species.

Using microchip-reading antennas to passively monitor a mammal reintroduction in south-west Queensland

Microchip-reading devices provide an inexpensive and efficient means of passively detecting and monitoring wildlife reintroductions, particularly where intensive methods such as trapping and radio-tracking may be difficult or pose risk to animal welfare. We trialled the use of microchip-reading antennas for post-release monitoring of the survival of bilbies (Macrotis lagotis) for a reintroduction in south-west Queensland. The antennas detected 76% of the released captive-born bilbies (all microchipped) and 30% of the microchipped wild-born bilbies during the study period. Overall, the microchip-reading antennas greatly improved the rate of detection for bilbies in the enclosure compared to cage trapping alone. Of the 42 bilbies that were microchipped and had the potential to be recaptured in traps or detected on microchip readers, 33 were recorded from the combined approaches, with 20 bilbies recaptured in traps and 29 bilbies detected on the microchip readers. Antenna location/placement should be carefully considered in the context of the target species’ home range size as it may affect the probability of animals encountering the antenna. Here we demonstrate the ability to use these microchip-reading antennas to passively monitor post-release survival in a remote location, just one of many potential applications for these devices in wildlife management and conservation.

Support to Iberian lynx reintroduction and perceived impacts: Assessments before and after reintroduction

AbstractThe assessment of the human dimensions of wildlife reintroduction projects is essential for their success. To date, few longitudinal studies (if any) have compared attitudes and perceived impacts before and after human‐assisted large predator reintroduction. In this study, we evaluated public (n = 1582) and hunters' (n = 773) support and perceived benefits and concerns before and after the reintroduction of the Iberian lynx (Lynx pardinus) (2007–2008 and 2015–2016, respectively) in southern Spain through a telephone survey. Most respondents supported lynx reintroduction, although support was slightly lower among hunters. Furthermore, support remained very high some years after lynx release. Our findings also revealed that perceptions toward the majority of benefits and concerns did not change after lynx reintroduction, and that those supporting reintroduction perceived more benefits, while opponents were more concerned. This suggests that efforts should focus on those opponents to reintroduction to ensure recognition of the benefits associated with predator restoration, including new tourism opportunists and predator's ecological values. Our research also points at the need of studying more in depth the views of those who oppose to predator reintroduction and of decision‐makers (e.g., landowners or game managers) when poaching is still a risk for restored populations even if the social context is favorable, as in our case‐study.

The Roles of Risk Perceptions and Social Trust in Willingness to Pay for Wildlife Reintroduction

Economic valuation can aid decision-makers in justifying the costs of conservation programs like wildlife reintroductions. Factors like stakeholder trust and confidence in conservation professionals for their ability to manage risks may play important roles in determining how local residents support and value the conservation of reintroduced species. This study analyzed data collected from a household survey of residents near an elk restoration zone in East Tennessee and found their willingness to pay (WTP) for reintroduced elk conservation to be $45.53 per household. Moreover, WTP was positively related with trust and confidence in agency professionals, and negatively related with perceived risks associated with elk. WTP also varied according to resident dependence on land for income and demographic characteristics. Results shed light on the economic benefit of wildlife reintroduction programs and the importance of social-psychological factors such as risk perception, trust and confidence in enhancing support for conservation programs.

Risk perception, trust and support for wildlife reintroduction and conservation

SummaryWildlife reintroduction projects often face resistance from local residents who see potential conflicts with the species or lack trust or confidence in the agencies and professionals involved in reintroduction. Yet the linkages between trust, confidence, risk perceptions, attitudes towards the species and local support for its reintroduction are not well known. The Dual-Mode Model of Cooperation and Cognitive Hierarchy Model were theoretical frameworks used to shed light on these linkages by exploring the potential roles trust and confidence play as mediators between risk perceptions and attitudes towards, and support for, reintroduced elk in Tennessee (USA). A mail survey of 1005 residents living in the five-county area surrounding the North Cumberland Elk Restoration Zone assessed resident attitudes and risk perceptions towards the reintroduced elk, trust towards the managing wildlife agency and support for continued conservation efforts. A structural equation model revealed that trust and confidence play positive roles in mitigating risk perceptions and improving support for the reintroduction of elk. The findings confirm the roles public trust and confidence play in wildlife reintroductions and should help agencies work towards building local trust and confidence, minimizing risks, improving attitudes and increasing the chances for successful outcomes for the species and people.

Coming Home Again: Inherent Tribal Sovereignty, the Tribal Wildlife Grant Program, and their Potential for Endemic Wildlife Reintroduction

Despite centuries of federal and state policies that have resulted in extinction or endangerment for multitudes of wildlife species with cultural, ecological, and historical significance to indigenous nations throughout the United States, many tribes have begun to attempt wildlife reintroduction in and near Indian Country, with or without federal or state support, and sometimes in spite of strident opposition. Recent efforts, including the reintroduction of bison to the Fort Peck and Wind River Reservations, the Nez Perce and Yurok Tribes’ release of California condors, and the Confederated Tribes of the Colville Reservation’s reintroduction of pronghorn antelope, have shown early signs of success. Tribes attempting to reintroduce endangered, threatened, or extirpated species have used a variety of legal and other tools to further their efforts, sometimes in combinations that reflect unique values or particular history connecting the tribe to the reintroduced species. The focus of this Article is an option that has received relatively little scholarly examination–the Tribal Wildlife Grant Program (“TWG” or “TWG Program”). The TWG Program presents a unique means by which tribes can establish, or reestablish, wildlife management frameworks largely free of federal oversight or intervention, allowing tribes to avoid certain complications of the federal-tribal legal relationship that have impeded many past tribal wildlife management efforts. The Program also allows tribes to choose when and how to partner with states, a significant improvement over other wildlife conservation and management frameworks that used a federalism structure. Finally, the Program provides a mechanism for actualizing inherent tribal sovereignty for tribes that are willing to establish positive laws in connection with their reintroduction efforts.

Archaeological mitogenomes illuminate the historical ecology of sea otters (Enhydra lutris) and the viability of reintroduction.

Genetic analyses are an important contribution to wildlife reintroductions, particularly in the modern context of extirpations and ecological destruction. To address the complex historical ecology of the sea otter (Enhydra lutris) and its failed 1970s reintroduction to coastal Oregon, we compared mitochondrial genomes of pre-extirpation Oregon sea otters to extant and historical populations across the range. We sequenced, to our knowledge, the first complete ancient mitogenomes from archaeological Oregon sea otter dentine and historical sea otter dental calculus. Archaeological Oregon sea otters (n = 20) represent 10 haplotypes, which cluster with haplotypes from Alaska, Washington and British Columbia, and exhibit a clear division from California haplotypes. Our results suggest that extant northern populations are appropriate for future reintroduction efforts. This project demonstrates the feasibility of mitogenome capture and sequencing from non-human dental calculus and the diverse applications of ancient DNA analyses to pressing ecological and conservation topics and the management of at-risk/extirpated species.

Improving engagement in managing reintroduction conflicts: learning from beaver reintroduction

Social factors hold implications for the success or failure of wildlife reintroductions. Potential conflict issues may prevent projects from proceeding or succeeding. The manner in which wildlife managers engage with affected people in conflict scenarios may prevent or contribute toward conflict escalation, so an understanding of how to improve engagement is required. We conducted interviews with individuals who reported conflicts with beavers (Castor fiber) within the case study of a reintroduction trial in England, called the ‘River Otter Beaver Trial’. Using a qualitative thematic analysis, we identified five themes to be considered when engaging with affected people in beaver reintroduction conflicts: (1) Proactive Engagement or a Fast Response; (2) Appropriate Communication; (3) Shared Decision-Making; (4) Sense that Humans are Responsible for Conflicts with Reintroduced Species; (5) A Need for Certainty. We conclude that engagement with affected individuals will likely be improved, with reduced conflict potential, where these themes are addressed.