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Author |
Bhatnagar, Y.V. |
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Title |
Ranging and Habitat Use by Himalayan Ibex (Capra ibex sibirica) in Pin Valley National Park |
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Book Whole |
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1997 |
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ibex; India; predator; prey; potected-area; parks; reserves; Pin-valley; browse; protected; area; 1850 |
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Ph.D. thesis |
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Saurashtra University |
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Place of Publication: Rajkot, India |
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SLN @ rana @ 301 |
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135 |
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Author |
Fox, J.L.; Nurbu, C.; Chundawat, R.S. |
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Title |
The Mountain Ungulates of Ladakh India |
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Journal Article |
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Year |
1991 |
Publication |
Biological Conservation |
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58 |
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167-190 |
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Keywords |
ungulates; predator; prey; Ladakh; India; browse; 1900 |
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Document Type: English |
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SLN @ rana @ 180 |
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298 |
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Author |
Fox, J.L.; Nurbu, C.; Chundawat, R.S. |
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Title |
Tibetian Argali (Ovis ammon hodgsoni) |
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Journal Article |
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Year |
1991 |
Publication |
Mammalia |
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48-51 |
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argali; predator; prey; Tibet; browse; 1910 |
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SLN @ rana @ 181 |
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299 |
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Author |
Kuznetsnov, G.U.; Matyushkin, E.N. |
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Title |
The snow leopard hunts |
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Journal Article |
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Year |
1980 |
Publication |
Int.Ped.Book of Snow Leopards |
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11 |
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44-48 |
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Russia; Ussr; Soviet-Union; Tien-Shan; hunting; behavior; predator; prey; browse; soviet; union; tien; shan; 3760 |
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Describes observations of a snow leopard hunting ibex in the western Tien Shan Mountains of USSR. The hunt was unsucceseful, but the account provides information on behavior of both the snow leoaprd and ibex in a predator prey relationship |
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SLN @ rana @ 56 |
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599 |
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Author |
Mishra, C.; Rawat, G.S. |
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Title |
Livestock grazing and Biodiversity Conservation: Comments on Saberwal |
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Journal Article |
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Year |
1998 |
Publication |
Conservation Biology |
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12 |
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25-32 |
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conservation; Saberwal; biodiversity; livestock; grazing; predator; prey; browse; 1950 |
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Document Type: English |
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SLN @ rana @ 341 |
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690 |
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Author |
Richard, C. |
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Title |
Sectoral Report in Vol II: Developing Strategies for Agriculture and Related Sectors in Ladakh |
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1999 |
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livestock; grazing; predator; prey; herders; herder; Ladakh; browse; 1970 |
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Submitted to the Leh Autonomous Hill Developement Council by IMOCD, Jan 1999
Title, Analytic: Rangelands and Livestock as a Niche Opportunity for Ladakh. |
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Call Number |
SLN @ rana @ 373 |
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815 |
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Author |
Schaller, G.B. |
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Title |
Wildlife of the Tibetan Steppe |
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Book Whole |
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Year |
1998 |
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Keywords |
Tibet; predator; prey; steppe; ungulates; browse; 1990 |
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University of Chicago Press |
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Chicago |
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SLN @ rana @ 344 |
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871 |
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Author |
Shah, K.B. |
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Title |
On a hunting pair of snow leopards in western Nepal |
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Year |
1989 |
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Journal of Bombay Natural Historical Society |
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86 |
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236-237 |
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hunting; Nepal; predator; snow leopard |
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Bombay Natural History Society |
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Bombay, India |
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Call Number |
SLN @ rana @ 991 |
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880 |
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Author |
The Snow Leopard Conservancy |
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Title |
Local People's Attitudes toward Wildlife Conservation in the Hemis National Park, with Special Reference to the Conservation of Large Predators |
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Report |
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2003 |
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7 |
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1-29 |
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Keywords |
local; local people; people; attitudes; attitude; wildlife; conservation; Hemis; national; national park; National-park; park; large; large predators; predators; predator; field; Jackson |
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Sonoma, California |
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SLC Field Series Document No 7. Prepared by R. Jackson, R. Wangchuk, and J. Dadul. Sonoma, California. |
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Call Number |
SLN @ rana @ 1012 |
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964 |
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Author |
Ale, S.; Brown, J. |
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Title |
The contingencies of group size and vigilance |
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Miscellaneous |
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Year |
2007 |
Publication |
Evolutionary Ecology Research, |
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9 |
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1263-1276 |
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Keywords |
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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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. |
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English |
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Call Number |
SLN @ rana @ 886 |
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53 |
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