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Author |
Xu, F.; Ming, M.; Yin, S.-jing; Munkhtsog, B. |
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Title |
Autumn Habitat Selection by Snow Leopard (Uncia uncia) in Beita Mountain, Xinjiang, China |
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Miscellaneous |
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Year |
2006 |
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Zoological Research |
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221-224 |
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habitat; Habitat selection; selection; snow; snow leopard; snow-leopard; leopard; uncia; Uncia uncia; Uncia-uncia; mountain; Xinjiang; China; Chinese; Altay; mountain system; system; 30; transects; transect; surveys; survey; study; area; analysis; primary; factor; 200; 600; Base; valley; Forest; region; south; grazing; status; topography |
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Habitat selection of Snow Leopard ( Unica unica) in Beita Mountain of the Altay Mountain system in northeast Xinjiang was conducted from September to October 2004. Six habitat features of 59 sites used by Snow Leopard and 30 random plots were measured by locating 15 transects surveys in the study area . Vanderploge and Scaviaps selectivity index was used to assess Snow Leopardps selection for the different habitat parameters. Principal Component Analysis was used as the primary factor . The results indicated that Snow Leopard preferred the altitude between 2000 – 2 200 m and avoided 2 600 – 3 000 m ; selected cliff base , ridgeline and avoided hillside and valley bottom ; utilized the shrub and rejected the forest ; selected the nongrazing area and avoided the slightly broken region ; preferred north orientation and rejected the south orientation. The results show that grazing status , vegetation type , topography and the ruggedness are the primary factors for the habitat selection of Snow Leopard. |
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Full text available in Chinese |
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SLN @ rana @ 872 |
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1039 |
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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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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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Kreuzberg-Mukhina, E.; Esipov A.V.; Bykova, E.A.; Vashetko, E.V.; Aromov, B. |
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Development of the national Action Plan for the conservation of Snow Leopard in Uzbekistan. Report: 1-51 |
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Report |
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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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Author |
Wahlberg, C.; Tarkkanen, A.; Blomqvist, L. |
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Further observations on the multiple ocular coloboma (MOC) in the snow leopard, Panthers uncia |
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1982 |
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International Pedigree Book of Snow Leopards |
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3 |
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139-144 |
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observations; multiple; Coloboma; snow; snow leopard; snow-leopard; leopard; uncia; International; pedigree; snow leopards; snow-leopards; leopards; Syndrome; eye; colobomatous; retinal; Retinal-Dysplasia; dysplasia; Case; zoo; factor |
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The first observation of the occurrence of multiple ocular coloboma (MOC) in a snow leopard was reported in the International Pedigree Book of Snow Leopards Volume I in 1978 (1). The lesions in this syndrome consist of coloboma of the upper eye lid and uveal coloboma of the globe. Even colobomatous retinal cysts and retinal dysplasia have been noted. The ethiology of in all ten cases of MOC in the snow leopards kept at the Helsinki Zoo were described and discussed in detail in Volume II of the International Pedigree Book of Snow Leopards (2,3). Three cases of MOC in the snow leopards kept at Henry Doorly Zoo, Omaha, Ne., have been described by Phillips (4), one case is known of in Amsterdam (van Bree, personal communication), and two cases in Zoo Zurich (Isenbugel and Weilenmann, pers. comm.) The ethiology of the defect is still not known although various theories ranging from genetic to exogenous factors have been presented. |
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Helsinki Zoo |
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Helsinki |
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Blomqvist, L. |
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SLN @ rana @ 982 |
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1000 |
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