Abstract: Background: Predation risk declines non-linearly with one's own vigilance and the vigilance of others in the group (the 'many-eyes' effect). Furthermore, as group size increases, the individual's risk of predation may decline through dilution with more potential victims, but may increase if larger groups attract more predators. These are known, respectively, as the dilution effect and the attraction effect.
Assumptions: Feeding animals use vigilance to trade-off food and safety. Net feeding rate declines linearly with vigilance.
Question: How do the many-eyes, dilution, and attraction effects interact to influence the relationship between group size and vigilance behaviour?
Mathematical methods: We use game theory and the fitness-generating function to determine the ESS level of vigilance of an individual within a group.
Predictions: Vigilance decreases with group size as a consequence of the many-eyes and dilution effects but increases with group size as a consequence of the attraction effect, when they act independent of each other. Their synergetic effects on vigilance depend upon the relative strengths of each and their interactions. Regardless, the influence of other factors on vigilance – such as encounter rate with predators, predator lethality, marginal value of energy, and value of vigilance – decline with group size.

Abstract: Temperature variations are expected to influence altitudinal movements of mountain herbivores and, in
turn, those of their predators, but relevant information is scarce. We evaluated monthly relationships
between temperature and altitude used by a large mountain-dwelling herbivore, the Himalayan tahr
Hemitragus jemlahicus, and its main predator, the snow leopard Panthera uncia, in an area of central
Himalaya for five consecutive years (2006–2010). In contrast to expectations, there was no significant
direct relationship between altitude of tahr sightings and temperature. The mean altitude of tahr sightings
decreased by c. 200 m throughout our study. As expected, snow leopard movements tracked those of tahr,
although the core area of the snow leopard did not move downwards. Tahr remained the staple of the
snow leopard diet: we suggest that the former did not move upwards in reaction to higher temperature
to avoid encounters with the latter. Avoidance of competition with the larger common leopard Panthera
pardus at lower altitudes could explain why snow leopards did not shift their core area downwards.
Apparently, interspecific interactions (predation; competition) influenced movements of Himalayan tahr
and snow leopards more than climatic variations.

Abstract: Phoo village in the Annapurna Conservation Area (ACA) in Nepal is located at 4,052 m als physically
in the central north of the country. Livestock keeping is the main activity of the people for making a
living amidst a conflict with snow leopard (Uncia uncia). Each year snow leopard kills a number of
livestock resulting significant economic losses for the poor people living in this remote area. Unless
the people – snow leopard conflict is well understood and appropriate conflict management activities
are implemented, the long run co-existence between people and snow leopard – especially the
existence of snow leopard in this part of the world -will be in question. This has now become an
utmost important as the aspiration of the people for economic development has risen significantly and
the area has been opened to tourism since spring 2002. In addition to this, the globalisation process has
directly and indirectly affected the traditional resource management practices and co-existence
strategies of many traditional societies including Phoo.
The livestock depredation for 3 years (2001 – 2004) by snow leopard was studied by interviewing the
herders to understand the responsible and specific bio-physical and socio-economic factors. The study
revealed that goats are most depredated species followed by sheep. Winter months (January – April)
and winter pastures are most vulnerable to snow leopard predation. Presence of bushes, forest and
boulders make good hides for snow leopard resulting into high depredation. The study also showed
that a lax animal guarding system was significantly responsible for high livestock depredation by snow
leopard.
The study showed that improvement in livestock guarding system should be adopted as the most
important activity. However despite the importance of livestock in the economy of Phoo it is still not
well understood why the herders neglect for proper livestock guarding. This requires further study.
Proper guarding system is required especially in winter season in winter pastures. It is also suggested
that there should be changes in the composition of livestock species by promoting more yaks and
discouraging or minimising goats. Yaks and large animals are less depredated and small animals like
goats and sheep are highly depredated by snow leopard. A trend was also observed in Phoo village
where there is an increase in the number of yaks and a decrease in the number of goats over last few
years. This could be a management response of the herders to livestock depredation. Other protective
measures of the livestock at the corrals have also been recommended including promotion of guard
dogs and other measures.
Since the area is opened for tourism, it is suggested that the tourism opportunity for the economic
development of the area should be grasped so that the heavy dependence on livestock raising would be
minimised. This will help minimise the number of human – snow leopard conflicts.

Abstract: Human-carnivore conflict is a common conservation and livelihood issue in mountain communities. This study was conducted to understand nature and extent of socio-ecological interaction between pastoralism and wildlife conservation in cold deserts of Karakoram Pamir Mountains (KPM) between China and Pakistan. Study revealed that livestock depredation is a burning issue in KPM with varying intensity from place to place, depending upon wild prey abundance, herd size, herding practices, predator type and age. Snow leopard, wolf and lynx were the major predators, while Brown bear despite its presence was reported being less fatal to livestock. Snow leopard killed highest number of animals (88.7% n=1440) mostly sheep and goats whereas, wolf killed more juvenile yaks. Lynx was found occasionally predating on young domestic crop. Highest number of kills was recorded from pastures during summer months (July-Aug) when animals were free grazing or were kept inside pens at night. Wild prey base being abysmally low, livestock seemed offering a considerable portion of diet to carnivores. Despite considerable losses from carnivores, more respondents in KNP (Pakistan) buffer zone had sympathies for predators compared to those in TNR (China) who were annoyed of the carnivores. Although people attributed escalating human-carnivore conflict to a higher level of protection to wild animals in Protected Areas (PA) but efforts are still needed to judiciously integrate conservation with local livelihood and development needs, otherwise herders may continue losing their livestock to predators and retaliatory killing of endangered carnivore species i.e., Snow leopard and Wolf may continue unabated and would further destabilize the fragile mountain ecosystem.

Abstract: Background: Large-scale changes in habitat conditions due to human modifications and climate change require management practices to consider how species communities can alter amidst these changes. Understanding species interactions across the gradient of space, anthropogenic pressure, and season provide the opportunity to anticipate possible dynamics in the changing scenarios. We studied the interspecific interactions of carnivore species in a high-altitude ecosystem over seasonal (summer and winter) and resource gradients (livestock grazing) to assess the impact of changing abiotic and biotic settings on coexistence.
Methods: The study was conducted in the Upper Bhagirathi basin, Western Himalaya, India. We analyzed around 4 years of camera trap monitoring data to understand seasonal spatial and temporal interactions of the snow leopard with common leopard and woolly wolf were assessed in the greater and trans-Himalayan habitats, respectively. We used two species occupancy models to assess spatial interactions, and circadian activity patterns were used to assess seasonal temporal overlap amongst carnivores. In addition, we examined scats to understand the commonalities in prey selection.
Results: The result showed that although snow leopard and wolves depend on the same limited prey species and show high temporal overlap, habitat heterogeneity and differential habitat use facilitate co-occurrence between these two predators. Snow leopard and common leopard were spatially independent in the summer. Conversely, the common leopard negatively influences the space use of snow leopard in the winter. Limited prey resources (lack of livestock), restricted space (due to snow cover), and similar activity patterns in winter might result in strong competition, causing these species to avoid each other on a spatial scale. The study showed that in addition to species traits and size, ecological settings also play a significant role in deciding the intensity of competition between large carnivores. Climate change and habitat shifts are predicted to increase the spatial overlap between snow leopard and co-predators in the future. In such scenarios, wolves and snow leopards may coexist in a topographically diverse environment, provided sufficient prey are available. However, shifts in tree line might lead to severe competition between common leopards and snow leopards, which could be detrimental to the latter. Further monitoring of resource use across abiotic and biotic environments may improve our understanding of how changing ecological conditions can affect resource partitioning between snow leopards and predators.