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Author |
Ferretti, F., Lovari, S. |
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Title |
Predation may counteract climatic change as a driving force for movements of mountain ungulates |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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2016 |
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Behavioural-Processes |
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129 |
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101-104 |
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Climate change, Environmental change, Interspecific interactions, Large cats, Predator-prey interactions |
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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. |
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SLN @ rakhee @ |
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1441 |
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Author |
Abramov V.K. |
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Title |
Ecological basis of the conservation of large predators in USSR |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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1974 |
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Vol.I. |
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7-8 |
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Keywords |
Ussr; large predators; conservation problems; snow leopard.; 5850; Russian |
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Problems of conservation of large predators (Felis tigris L., Panthera pardus L., Felis uncia Schreb., Acinonyx jubatus Schreb., Hyaena h¢…†n… L., Cuon alpinus Pall., Ursus maritimus Phipps, U.tibetanus Cuv.) inhabiting territory of USSR are discussed. |
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Full text available in RussianJournal Title: Proceedings of 1st International Congress on mammals. |
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Call Number |
SLN @ rana @ 564 |
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31 |
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Author |
Aizin B.M. |
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Title |
Siberian ibex Capra sibirica Pall |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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1969 |
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98-105 |
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Kyrgyzsatn; Siberian ibex; distribution; life history; diet; predators; snow leopard.; 5890; Russian |
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It describes status of ibex in Kyrgyzstan, its distribution, behavioral patterns, enemies and competitors, etc. The enemies of ibex are snow leopard and wolf. All year round snow leopard preys on ibex its main food object and, therefore, should there be ibexes, snow leopards would be somewhere around. In winter, a considerable number of ibex dies from wolves. Sometimes dogs prey on ibex, too. Golden eagles and bearded vultures prey on young ibexes. However, poachers remain the most dangerous enemy. |
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Full text available in RussianJournal Title: Game species of Kyrgyzstan. |
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Call Number |
SLN @ rana @ 568 |
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44 |
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Author |
Ale, S.; Whelan, C. |
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Title |
Reappraisal of the role of big, fierce predators |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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2008 |
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Biodiversity Conservation |
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685-690 |
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Keywords |
Biodiversity ú Conservation ú Costs of predation ú Indirect effects ú Non-lethal effects ú Predators ú Top-down control; big; predators; predator |
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Abstract |
The suggestion in the early 20th century that top predators were a necessary component of ecosystems because they hold herbivore populations in check and promote biodiversity was at Wrst accepted and then largely rejected. With the advent of Evolutionary Ecology and a more full appreciation of direct and indirect effects of top predators, this role of top predators is again gaining acceptance. The previous views were predicated upon lethal effects of predators but largely overlooked their non-lethal effects. We suggest that
conceptual advances coupled with an increased use of experiments have convincingly demonstrated that prey experience costs that transcend the obvious cost of death. Prey species use adaptive behaviours to avoid predators, and these behaviours are not cost-free. With predation risk, prey species greatly restrict their use of available habitats and consumption of available food resources. Effects of top predators consequently cascade down to the trophic levels below them. Top predators, the biggies, are thus both the targets of and the means for conservation at the landscape scale. |
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Call Number |
SLN @ rana @ 885 |
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52 |
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Author |
Ale, S.; Brown, J. |
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Title |
The contingencies of group size and vigilance |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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2007 |
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Evolutionary Ecology Research, |
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9 |
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1263-1276 |
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attraction effect,contingency,dilution effect,fitness,group-size effect,many-eyes effect,predation risk,vigilance behaviour; predation; decline; potential; predators; predator; feeding; Animals; Animal; use; food; effects; Relationship; behaviour; methods; game; Interactions; interaction; factor; value; Energy |
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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. |
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SLN @ rana @ 886 |
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53 |
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Anonymous |
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Title |
International Specialists Discuss China's Threatened Cats |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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1992 |
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China; Iucn; habitat; predator; prey; livestock; herders; conflict; hunting; poaching; trapping; bones; medicine; trade; development; Slims; Cites; protected-areas; parks; preserves; reserves; refuge; browse; protected; areas; 3990 |
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Full text at URL |
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SLN @ rana @ 186 |
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80 |
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Anonymous |
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Title |
Livestock Predation Control Workshop |
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1999 |
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Lahul-Spiti; Ladakh; Hemis; parks; reserves; refuge; protected-area; argali; abix; blue-sheep; wolves; distribution; status; population; poaching; hunting; trade; skins; livestock; pelts; coat; fur; bones; medicine; prey-depletion; herders; habitat; habitat-degradation; tourism; Tmi; Islt; predator; prey; conflict; compensation; trekking; blue; sheep; browse; protected; area; depletion; degradation; international snow leopard trust; 3940 |
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Full Text at URLDate of Meeting: Ladakh (1999 Oct 6- Oct 10 ) |
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SLN @ rana @ 359 |
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86 |
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Author |
Baidavletov R.J. |
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Title |
Large predators of the Kazakhstan Altai and their importance for hunting industry |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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2002 |
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79-81 |
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Kazakhstan; Altai; large predators; snow leopard; distribution; number; preys.; 6110; Russian |
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Fauna of large predatory mammals in the Kazakhstan Altai is represented by five species: wolf, bear, glutton, lynx, and snow leopard. Snow leopard inhabits the Sarymsakty and Tarbagai ridges and South Altai. This species is observed to regularly penetrate into the Kutun and Kurchum ridges. Its habitat covers an area of 1,800 sq. km, its population being 14-16 animals. The population density is 0.7 1.0 animals per 100 sq. km. A hunting area of a female animal with two cubs is 45 85 sq. km; a male 120 sq. km. Snow leopard main preys on ibex (41.1 percent), roe-deer (31.0 percent), and moral (13.8 percent); in summer on gray marmot (28.6 percent). Snow leopard is also known to prey on hares, birds, argali, and elks. |
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Full text available in RussianJournal Title: Zoological studies in Kazakhstan. |
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SLN @ rana @ 590 |
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107 |
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Bhatnagar, Y.V.; Stakrey, R.W.; Jackson, R. |
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A Survey of Depredation and Related Wildlife-Human Conflicts in Hemis National Park, Ladakh (India) |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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2000 |
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Snow Line |
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xvi |
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3 |
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Jammu; Kashmir; Ladakh; conflicts; herders; livestock; predator; prey; grazing; ungulates; economics; Hemis; browse; 4430 |
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Islt |
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Seattle |
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Full Text at URLJournal Title: Snowline |
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SLN @ rana @ 431 |
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136 |
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Chundawat, R.S.; Rawat G.S. |
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Food Habits of Snow Leopard in Ladakh, India |
Type ![sorted by Type field, descending order (down)](img/sort_desc.gif) |
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1990 |
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India; Ladakh; behavior; predator; prey; livestock; blue-sheep; ibex; ungulates; marmots; parks; refuge; protected-area; reserves; diet; habitat; scat; kills; blue; sheep; browse; protected; area; 970 |
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The snow leopard has remained little studied in the past, and most of the information available is either in the form of natural history or anecdotal notes. The inaccessibility of the terrain and its secretive habits make this one of the more difficult animals to study in the wild. In the past decade, several ecological surveys were conducted in India, Nepal, China and Mongolia, which gave us information on the status and distribution of snow leopard (Jackson, Mallon, Fox, Schaller, Chundawat) A detailed study in Nepal through light on its secretive habits ( Jackson and Ahlborn, 1989). Even then little is known about its feeding habits. The present paper discusses this aspect from a study which was part of a detailed study conducted on the ecology of snow leopard in India from October 1987 to Feburary 1990. |
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full text available at URL |
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SLN @ rana @ 305 |
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223 |
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