Eavesdropping in solitary large carnivores: Black bears advance and vocalize toward cougar playbacks

Ethology ◽  
2017 ◽  
Vol 123 (9) ◽  
pp. 593-599 ◽  
Author(s):  
Justin P. Suraci ◽  
Michael Clinchy ◽  
Devin J. Roberts ◽  
Liana Y. Zanette
Keyword(s):  
Black Bears ◽  
Large Carnivores

scholarly journals The ecology and behaviour of pumas (Puma concolor) in northern California, U.S.A.

2021 ◽  
Author(s):  
◽  
Maximilian L. Allen
Keyword(s):  
Real Time ◽  
Feeding Ecology ◽  
Reproductive Strategy ◽  
Puma Concolor ◽  
Black Bears ◽  
Specific Interactions ◽  
Ecological Communities ◽  
Large Carnivores ◽  
Sexual Variation ◽  
Integral Role

<p>Large carnivores are important components of many ecosystems and play an integral role in determining the composition and structure of ecological communities. The influences of pumas (Puma concolor) on other species, including prey and competitors, vary across their range and among individuals. I used novel methodologies, including intensive real-time GPS investigations of potential kill sites using ARGOS satellite collars, and motion-triggered video cameras to study the intra- and inter-specific interactions of pumas and understand their influences on ecological communities. Results from my dissertation support previous findings that pumas play an integral role in shaping their respective ecosystem, but that pumas are also influenced substantially by their local environment. Overall, my dissertation highlights the importance of understanding intra- and inter-specific interactions of large carnivores when attempting to understand their influences on ecological communities. I tested whether pumas exhibited sexual variation in their use of communication behaviours at community scrape areas, and what factors influenced their mating strategies. I found that males more frequently exhibited and spent longer durations on ‘producing’ behaviours (scraping and body rubbing), while females more frequently exhibited and spent longer durations on ‘consuming’ behaviours (olfactory investigation and flehmen response behaviours). This suggests that male reproductive strategy is based on advertisement for possible mates, while female reproductive strategy is based on assessment of potential mates. Pumas also exhibited sexual variation in their patterns of visitation. Males were regular visitors, while females were irregular visitors whose visitation cycles were apparently correlated with oestrus. Mate selection by females was complex and based on multiple cues, the two most important of which were the visitation rate and mass of males. The frequency of male visits and the display of some behaviours were influenced most by visits from female pumas, but were also influenced by visits from competing males. I used real-time and fine-scale GPS location data to find prey killed by individual pumas, and analysed seasonal patterns to understand local influences on puma behaviour and feeding ecology. I found that black-tailed deer (Odocoileus hemionus columbianus) were the main prey of pumas, constituting 98.6% of their diet by mass, and that the elevations at which pumas killed black-tailed deer correlated significantly with seasonal elevations used by black-tailed deer. I found pumas had relatively high ungulate kill rates ( ̅ = 1.07 ungulates/week, and ̅ = 5.78 kg/day), and that kill rates in ungulates/week varied among seasons and were highest in summer and autumn. Importantly, the handling times of black-tailed deer >1 year old showed an inverse seasonal relationship with kill rates in ungulates/week, and the lower handling times may have been due to black bear kleptoparasitism. These findings suggest that puma feeding ecology can be strongly influenced by seasonal behaviour of their prey and dominant scavengers. Given the potential for large carnivores to influence scavengers, I studied the influences of both pumas and black bears on the scavenger community. I found that pumas and black bears were a source of limitation for scavengers, both on the species richness and sum feeding times of the scavenger community, as well as the occurrence, total feeding times, and mean feeding bout durations of scavenger species. However, pumas had some positive influences, for example they facilitated the acquisition of carrion by scavengers, and they apparently initiated a cascading pattern that led to an increase in the acquisition of carrion by small carnivores. In contrast, black bears, as dominant scavengers, monopolized carrion resources and substantially limited the acquisition of carrion by other scavengers, and in fact they had larger limitations for scavengers than pumas as top-level predators. The influences on carrion acquisition suggest that large carnivores have important influences on the scavenger community, and their influences could be a mechanism for the effects large carnivores have on community composition.</p>

scholarly journals The ecology and behaviour of pumas (Puma concolor) in northern California, U.S.A.

2021 ◽  
Author(s):  
◽  
Maximilian L. Allen
Keyword(s):  
Real Time ◽  
Feeding Ecology ◽  
Reproductive Strategy ◽  
Puma Concolor ◽  
Black Bears ◽  
Specific Interactions ◽  
Ecological Communities ◽  
Large Carnivores ◽  
Sexual Variation ◽  
Integral Role

<p>Large carnivores are important components of many ecosystems and play an integral role in determining the composition and structure of ecological communities. The influences of pumas (Puma concolor) on other species, including prey and competitors, vary across their range and among individuals. I used novel methodologies, including intensive real-time GPS investigations of potential kill sites using ARGOS satellite collars, and motion-triggered video cameras to study the intra- and inter-specific interactions of pumas and understand their influences on ecological communities. Results from my dissertation support previous findings that pumas play an integral role in shaping their respective ecosystem, but that pumas are also influenced substantially by their local environment. Overall, my dissertation highlights the importance of understanding intra- and inter-specific interactions of large carnivores when attempting to understand their influences on ecological communities. I tested whether pumas exhibited sexual variation in their use of communication behaviours at community scrape areas, and what factors influenced their mating strategies. I found that males more frequently exhibited and spent longer durations on ‘producing’ behaviours (scraping and body rubbing), while females more frequently exhibited and spent longer durations on ‘consuming’ behaviours (olfactory investigation and flehmen response behaviours). This suggests that male reproductive strategy is based on advertisement for possible mates, while female reproductive strategy is based on assessment of potential mates. Pumas also exhibited sexual variation in their patterns of visitation. Males were regular visitors, while females were irregular visitors whose visitation cycles were apparently correlated with oestrus. Mate selection by females was complex and based on multiple cues, the two most important of which were the visitation rate and mass of males. The frequency of male visits and the display of some behaviours were influenced most by visits from female pumas, but were also influenced by visits from competing males. I used real-time and fine-scale GPS location data to find prey killed by individual pumas, and analysed seasonal patterns to understand local influences on puma behaviour and feeding ecology. I found that black-tailed deer (Odocoileus hemionus columbianus) were the main prey of pumas, constituting 98.6% of their diet by mass, and that the elevations at which pumas killed black-tailed deer correlated significantly with seasonal elevations used by black-tailed deer. I found pumas had relatively high ungulate kill rates ( ̅ = 1.07 ungulates/week, and ̅ = 5.78 kg/day), and that kill rates in ungulates/week varied among seasons and were highest in summer and autumn. Importantly, the handling times of black-tailed deer >1 year old showed an inverse seasonal relationship with kill rates in ungulates/week, and the lower handling times may have been due to black bear kleptoparasitism. These findings suggest that puma feeding ecology can be strongly influenced by seasonal behaviour of their prey and dominant scavengers. Given the potential for large carnivores to influence scavengers, I studied the influences of both pumas and black bears on the scavenger community. I found that pumas and black bears were a source of limitation for scavengers, both on the species richness and sum feeding times of the scavenger community, as well as the occurrence, total feeding times, and mean feeding bout durations of scavenger species. However, pumas had some positive influences, for example they facilitated the acquisition of carrion by scavengers, and they apparently initiated a cascading pattern that led to an increase in the acquisition of carrion by small carnivores. In contrast, black bears, as dominant scavengers, monopolized carrion resources and substantially limited the acquisition of carrion by other scavengers, and in fact they had larger limitations for scavengers than pumas as top-level predators. The influences on carrion acquisition suggest that large carnivores have important influences on the scavenger community, and their influences could be a mechanism for the effects large carnivores have on community composition.</p>

scholarly journals Suitable habitat for recolonizing large carnivores in the midwestern USA

Oryx ◽  
2015 ◽  
Vol 50 (3) ◽  
pp. 555-564 ◽  
Author(s):  
Julia B. Smith ◽  
Clayton K. Nielsen ◽  
Eric C. Hellgren
Keyword(s):  
Puma Concolor ◽  
Black Bears ◽  
Suitable Habitat ◽  
Large Carnivores ◽  
Study Region ◽  
Potential Habitat ◽  
Ecosystem Effects ◽  
Multi Criteria Evaluation ◽  
Midwestern Usa ◽  
Combined Models

AbstractLarge carnivores are recolonizing parts of North America and Europe as a result of modern management and conservation policy. In the midwestern USA, black bears Ursus americanus, cougars Puma concolor and grey wolves Canis lupus have the potential to recolonize provided there is suitable habitat. Understanding where large carnivores may become re-established will prepare resource professionals for the inevitable ecosystem effects and potential human–carnivore conflicts associated with these species. We developed individual and combined models of suitable habitat for black bears, cougars and wolves in 18 midwestern states, using geospatial data, expert-opinion surveys, and multi-criteria evaluation. Large, contiguous areas of suitable habitat comprised 35, 21 and 13% of the study region for wolves, bears and cougars, respectively. Approximately 12% of the region was considered suitable for all three species. Arkansas, Minnesota, Texas and Wisconsin had the highest proportions (> 40%) of suitable habitat for black bears; Arkansas, Michigan, Missouri, Texas and Wisconsin had the highest proportions (≥ 20%) of suitable habitat for cougars; and only in four states in the study region was < 29% of land suitable wolf habitat. Models performed well when validated by comparing suitability values of independent sets of known carnivore locations to those of random locations. Contiguous areas of suitable habitat typically spanned multiple states, thus coordination across boundaries and among agencies will be vital to successful conservation of these species. Our models highlight differences in habitat requirements and geographical distribution of potential habitat among these carnivores, as well as areas vital to their persistence in the Midwest.

Waldpolitischer Jahresrückblick 2011

2012 ◽  
Vol 163 (5) ◽  
pp. 145-154 ◽  
Author(s):  
Willi Zimmermann
Keyword(s):  
Forest Policy ◽  
Federal Court ◽  
Annual Review ◽  
Court Decisions ◽  
Large Carnivores ◽  
Policy Issues ◽  
The Government ◽  
European Forest ◽  
Forest Legislation ◽  
Forest Act

Annual review of Swiss forest policy 2011 The revision of the Forest Act, the adoption of the Forest Programme 2020 by the Federal Council as well as the preparation of the second contribution period of the New System of Financial Equalisation and Division of Tasks between the Confederation and the Cantons (NFE) shaped, in addition to the routine business, the forest policy of 2011. The parliamentary initiatives on forest and forest policy issues remained of about the same amount as in previous years, while the Federal Court decisions on forest legislation have declined significantly. In various forest-related sectoral policies, the government and parliament made important decisions. In climate policy, the Parliament adopted the CO2 Law. However, this has not yet happened to the revision of the Spatial Planning Act. In nature and landscape policy, the administration has prepared the Swiss biodiversity strategy so far that the Federal Council could send it out for consultation. The revision of the Hunting Regulation, with changes in the management of large carnivores, is nearing adoption. At the international level, the Federal Council has submitted the European Landscape Convention to the Parliament for ratification, and the European forestry ministers have agreed to the preparation of a European Forest Convention.

scholarly journals Are Large Carnivores the Real Issue? Solutions for Improving Conflict Management through Stakeholder Participation

2021 ◽  
Vol 13 (8) ◽  
pp. 4482
Author(s):  
Valeria Salvatori ◽  
Estelle Balian ◽  
Juan Carlos Blanco ◽  
Xavier Carbonell ◽  
Paolo Ciucci ◽  
...  
Keyword(s):  
Stakeholder Participation ◽  
Agricultural Landscapes ◽  
Added Value ◽  
Practical Implementation ◽  
Large Carnivores ◽  
Societal Issues ◽  
Everyday Activities ◽  
Management Interventions ◽  
Species Expansion ◽  
General Scope

Social conflicts around large carnivores are increasing in Europe, often associated to the species expansion into human-modified and agricultural landscapes. Large carnivores can be seen as an added value by some but as a source of difficulties by others, depending on different values, attitudes, livelihoods, and everyday activities. Therefore, the effective involvement of the different interest groups is important to identify and shape tailored solutions that can potentially be implemented, complementing top-down approaches that might, on their own, result in lack of implementation and buy-in. To improve dialogue in conflictual situations, as part of a European project promoted by the European Parliament, we assessed the practical implementation of participatory processes in three sample areas in Europe where wolves and bears have recently been increasingly impacting human activities. Our results demonstrate that collaboration among different and generally contrasting groups is possible. Even in situations where large-carnivore impacts were seen as unsatisfactorily managed for many years, people were still willing and eager to be involved in alternative discussion processes hoping this would lead to concrete solutions. An important and common highlight among the three study areas was that all the management interventions agreed upon shared the general scope of improving the conditions of the groups most impacted by large carnivores. The process showed the importance of building trust and supporting dialogue for knowledge co-production and mitigation of conflicts between stakeholders and that controversial environmental issues have the potential to trigger a meaningful dialogue about broader societal issues. The direct involvement and support of competent authorities, as well as the upscaling of this process at larger administrative and social scales, remain important challenges.

scholarly journals Heterogeneous impacts of large carnivores on hunting lease prices

2021 ◽  
Vol 101 ◽  
pp. 105215
Author(s):  
Julian E. Lozano ◽  
Katarina Elofsson ◽  
Yves Surry
Keyword(s):  
Large Carnivores

scholarly journals Use of a spatially explicit individual-based model to predict population trajectories and habitat connectivity for a reintroduced ursid

Oryx ◽  
2021 ◽  
pp. 1-10
Author(s):  
Desiree Andersen ◽  
Yoonjung Yi ◽  
Amaël Borzée ◽  
Kyungmin Kim ◽  
Kwang-Seon Moon ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Radio Telemetry ◽  
Suitable Habitat ◽  
Large Carnivores ◽  
Environmental Interactions ◽  
Dispersal Capability ◽  
The Republic ◽  
Suitable Habitats ◽  
Mixed Modelling ◽  
Population Equilibrium

Abstract Reintroductions of large carnivore species present unique opportunities to model population dynamics as populations can be monitored from the beginning of a reintroduction. However, analysis of the population dynamics of such reintroduced populations is rare and may be limited in incorporating the complex movements and environmental interactions of large carnivores. Starting in 2004, Asiatic black bears Ursus thibetanus were reintroduced and tracked in the Republic of Korea, along with their descendants, using radio telemetry, yielding 33,924 tracking points over 12 years. Along with information about habitat use, landscape, and resource availability, we estimated the population equilibrium and dispersal capability of the reintroduced population. We used a mixed modelling approach to determine suitable habitat areas, population equilibria for three different resources-based scenarios, and least-cost pathways (i.e. corridors) for dispersal. Our population simulations provided a mean population equilibrium of 64 individuals at the original reintroduction site and a potential maximum of 1,438 individuals in the country. The simulation showed that the bear population will disperse to nearby mountainous areas, but a second reintroduction will be required to fully restore U. thibetanus. Northern suitable habitats are currently disconnected and natural re-population is unlikely to happen unless supported. Our methodologies and findings are also relevant for determining the outcome and trajectories of reintroduced populations of other large carnivores.

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