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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 |
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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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Author |
Alibekov L.A. |
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Title |
Fauna |
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Miscellaneous |
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Year |
1978 |
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192-195 |
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Uzbekistan; Jizak region; fauna; landscape; biotic factors; fishes; reptiles; birds; insects; mammals; snow leopard.; 5970; Russian |
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Represented is fauna of big salt-marsh valleys and pre-Kyzylkum area, a tier of low desert foothill valleys, tiers of lowland ridges, deeply cut hillside midlands, and cold highlands of the watershed ridge-top tier in the Jizak region of Uzbekistan. The highest tier of the Jizak region, a habitat of snow leopard, Menzbier's marmot, Siberian ibex, sometimes wild Tajik sheep coming from the East, bear ascending from lower elevations, and wolf in summer, has the most adverse living conditions. Central Asia argali and stone marten inhabit in central part of the North Nurata ridge. |
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Full text available in RussianJournal Title: Natural conditions and resources of the Jizak region. |
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Call Number |
SLN @ rana @ 576 |
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60 |
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Author |
Chichikin Yu.N., Y.A.I. |
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Title |
Issyk Kul nature reserve |
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Miscellaneous |
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1969 |
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475-480 |
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Kyrgyzstan; Issyk Kul nature reserve; Jety Oguz site; establishment; climate; physiographic factors; plants; Animals; snow leopard.; 6460; Russian |
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A description of the Issyk Kul nature reserve (Kyrgyzstan) is given and includes as follows: data of establishment, location, physic and geographic description, climate, flora and fauna. Snow leopard inhabited in Jety Oguz site of the nature reserve. |
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Full text available in RussianJournal Title: Protected areas of Soviet Union. |
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SLN @ rana @ 624 |
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219 |
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Author |
Chumakova A.V. |
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Title |
The Kyzylsu, Miraki, and Markakol nature reserves |
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Miscellaneous |
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1980 |
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153-155 |
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Central Asia; nature reserves; Kysylsu nature reserve; Miraki nature reserve; Markakol nature reserve; establishment; soil; climate; physiographic factors; researching; plants; Animals; snow leopard.; 6470; Russian |
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A description of the Kyzylsu, Miraki, and Markakol nature reserves is given and includes as follows: data of establishment, location, physic and geographic description, types of soils, climate, vegetation, altitude zones, and fauna. In the Kyzylsu nature reserve there are 28 mammal species; in Miraki 23, and in Mirkakol 39. Snow leopard can be found in all the three nature reserves. |
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Full text available in RussianJournal Title: Nature reserves of the USSR. |
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SLN @ rana @ 625 |
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220 |
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Author |
Esipov V.M. |
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Title |
Chatkal nature reserve |
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Miscellaneous |
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1969 |
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486-494 |
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Uzbekistan; Western Tien Shan; Chatkal nature reserve; establishment; soil; climate; physiographic factors; altitude zones; flora; fauna; snow leopard.; 6550; Russian |
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Presented is history of the Chatkal nature reserve's establishment, physic and geographic description, types of soils, climate, altitude zones, flora and fauna, historical monuments. Snow leopard is quiet rare species in nature reserve. Last years irbis's tracks and voice have been recorded in highly mountain sites of Maidantal part of Chatkal nature reserve. |
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Full text available in RussianJournal Title: Nature reserves of the USSR. |
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SLN @ rana @ 633 |
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262 |
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Jackson, R.; Roe, J.; Wangchuk, R.; Hunter, D. |
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Title |
Camera-Trapping of Snow Leopards |
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2005 |
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Cat News |
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42 |
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Spring |
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19-21 |
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camera trapping; snow; snow leopards; snow leopard; snow-leopards; snow-leopard; leopards; leopard; felids; tigers; tiger; techniques; surveys; survey; information; factor; marking; behavior; Ahlborn; Jackson; habitat; status; range; census; India; Hemis; High; national; national park; National-park; park; Ladakh; leh |
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Solitary felids like tigers and snow leopards are notoriously difficult to enumerate, and indirect techniques like pugmark surveys often produce ambiguous information that is difficult to interpret because many factors influence marking behavior and frequency (Ahlborn & Jackson 1988). Considering the snow leopard's rugged habitat, it is not surprising then that information on its current status and occupied range is very limited. We adapted the camera-trapping techniques pioneered by Ullas Karanth and his associates for counting Bengal tigers to the census taking of snow leopards in the Rumbak watershed of the India's Hemis High Altitude National Park (HNP), located in Ladakh near Leh (76ø 50' to 77ø 45' East; 33ø 15' to 34ø 20'North). |
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SLN @ rana @ 1017 |
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475 |
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Author |
Kitchener, S.L.; Meritt; Rosenthal, M. |
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Title |
Observations on the breeding and husbandry of snow leopards, Panthera uncia |
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1975 |
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Int.Zoo Yearbook |
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15 |
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212-217 |
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breeding; husbandry; behavior; captivity; zoos; zoo; browse; 3640; Adult; care; biology; growth; mortality; factor; young; snow; snow leopards; snow leopard; snow-leopards; snow-leopard; leopards; leopard; program; park |
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Describes adult care and breeding biology, and the care, growth, and mortality factors of young snow leopards in a successful breeding program in the Lincon Park Zoo, Chicago, Illinois. |
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SLN @ rana @ 31 |
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535 |
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Kolmstetter, C.; Munson, L.; Ramsay, E.C. |
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Title |
Degenerative spinal disease in large felids |
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2000 |
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J Zoo Wildl Med |
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31 |
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1 |
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15-19 |
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Age-Factors; Animal; Animals; zoo; Autopsy; veterinary; Carnivora; Female; Lions; Male; Age; factor; browse; 110 |
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Degenerative spinal disorders, including intervertebral disc disease and spondylosis, seldom occur in domestic cats. In contrast, a retrospective study of 13 lions (Panthera leo), 16 tigers (Panthera tigris), 4 leopards (Panthera pardis), 1 snow leopard (Panthera uncia), and 3 jaguars (Panthera onca) from the Knoxville Zoo that died or were euthanatized from 1976 to 1996 indicated that degenerative spinal disease is an important problem in large nondomestic felids. The medical record, radiographic data, and the necropsy report of each animal were examined for evidence of intervertebral disc disease or spondylosis. Eight (three lions, four tigers, and one leopard) animals were diagnosed with degenerative spinal disease. Clinical signs included progressively decreased activity, moderate to severe rear limb muscle atrophy, chronic intermittent rear limb paresis, and ataxia. The age at onset of clinical signs was 10-19 yr (median = 18 yr). Radiographic evaluation of the spinal column was useful in assessing the severity of spinal lesions, and results were correlated with necropsy findings. Lesions were frequently multifocal, included intervertebral disc mineralization or herniation with collapsed intervertebral disc spaces, and were most common in the lumbar area but also involved cervical and thoracic vertebrae. Marked spondylosis was present in the cats with intervertebral disc disease, presumably subsequent to vertebral instability. Six of the animals' spinal cords were examined histologically, and five had acute or chronic damage to the spinal cord secondary to disc protrusion. Spinal disease should be suspected in geriatric large felids with decreased appetite or activity. Radiographic evaluation of the spinal column is the most useful method to assess the type and severity of spinal lesions. |
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1042-7260 |
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Document Type: eng |
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SLN @ rana @ 384 |
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545 |
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Author |
Kovshar A.F. |
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Soils. Plants and animals. Vertical zones |
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Miscellaneous |
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1972 |
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21-41 |
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Kazakhstan; Aklu Jabagly nature reserve; establishment; soil; climate; physiographic factors; researching; plants; Animals; snow leopard.; 7340; Russian |
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A description of the Aksu Jabagly nature reserve is given and includes as follows: data of establishment, location, physic and geographic description, types of soils, climate, flora and fauna. In the nature reserve there are 238 birds, 42 mammals, 9 reptiles and 2 fishes. Snow leopard inhabited in the nature reserve. |
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Full text available in RussianJournal Title: Aksu Jabagly nature reserve. Guidebook for nature reserve. |
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SLN @ rana @ 712 |
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579 |
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Kreuzberg-Mukhina, E.; Esipov A.V.; Bykova, E.A.; Vashetko, E.V.; Aromov, B. |
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Title |
Development of the national Action Plan for the conservation of Snow Leopard in Uzbekistan. Report: 1-51 |
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2003 |
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1-51 |
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1-52 |
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development; national; action; plan; conservation; snow; snow leopard; snow-leopard; leopard; Uzbekistan; Report; Chatkal nature reserve; nature; reserve; Hissar nature reserve; Islt; project; strategy; biology; status; factor; conservation measures; conservation measure |
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This document is the final report on the ISLT Project “Development of national Action plan for the conservation of Snow Leopard in Uzbekistan” and a Conservation Strategy for the Snow leopard in Uzbekistan. It includes biology and current status, limiting factors, existing and necessary conservation measures. |
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Uzbekistan |
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Tashkent, Uzbekistan, Institute of Zoology, Chatkal nature reserve, Hissar nature reserve. Final Report on the ISLT project. |
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SLN @ rana @ 969 |
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594 |
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