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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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Anonymous |
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A snow leopard conservation plan for Mongolia |
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Report |
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2000 |
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1-8 |
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awareness; behaviour; biodiversity; conservation plan; decline; density; ecology; fund-raising; funding; habitat degradation; Himalayan; management; Mongolia; montane; pastoralists; pelt; predator; snow-leopard-conservation-plan; snow leopard; trade; Wwf |
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The snow leopard faces multiple threats in the Himalayan region, from habitat degradation, loss of prey, the trade in pelts, parts and live animals, and conflict with humans, primarily pastoralists. Consequently, the populations are considered to be in decline and the species is listed as Endangered in the IUCN's Red List. As a 'flagship' and 'umbrella' species the snow leopard can be a unifying biological feature to raise awareness of its plight and the need for conservation, which will benefit other facets of Himalayan biodiversity as well. Some studies of snow leopards have been conducted in the Himalayan region. But, because of its elusive nature and preference for remote and inaccessible habitat, knowledge of the ecology and behaviour of this mystical montane predator is scant. The available information, however, suggests that snow leopards occur at low densities and large areas of habitat are required to conserve a viable population. Thus, many researchers and conservationists have advocated landscape-scale approaches to conservation within a regional context, rather than focusing on individual protected areas.This regional strategy for WWF's snow leopard conservation program is built on such an approach. The following were identified as important regional issues: 1) international trade in snow leopards and parts; 2) the human-snow leopard conflict; 3) the need for a landscape approach to conservation to provide large spatial areas that can support demographically and ecologically viable snow leopard metapopulations; 4) research on snow leopard ecology to develop long-term, science-based conservation management plans; and 5) regional coordination and dialog. While the issues are regional, the WWF's in the region have developed 5-year strategic actions and activities, using the regional strategies as a touchstone, which will be implemented at national levels. The WWF's will develop proposals based on these strategic actions, with estimated budgets, for use by the network for funding and fund-raising. WWF also recognizes the need to collaborate and coordinate within the network and with other organizations in the region to achieve conservation goals in an efficient manner, and will form a working group to coordinate activities and monitor progress. |
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Publication date unknown but must be at least from 2000. |
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Call Number |
SLN @ rana @ 995 |
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92 |
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Author |
Heiz A.V. |
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Title |
Snow leopard in Kyrgyzstan and its protection |
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Miscellaneous |
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Year |
1983 |
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3 |
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92-93 |
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Kyrgyzstan; snow leopard; number; decline; mountain ungulates; livestock; hunting; propaganda; protection.; 6870; Russian |
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In the year 1970, the quantity of snow leopards in Kyrgyzstan was defined as 1,300 animals, while in the years to follow 1,600 animals were recorded. A snow leopard population has significantly decreased since recently because of intense extermination of snow leopard's prey ungulates, particularly ibex. In some areas of the Kyrgyz ridge livestock is growing in number thus affecting snow leopard population. It is extremely rare that snow leopard would attack livestock. Snow leopards can be caught under special license. Educational and awareness work among shepherds and hunters residing in the mountainous area of the country needs to be improved. |
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Full text available in RussianJournal Title: Rare mammal species of the USSR and their protection. |
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Call Number |
SLN @ rana @ 665 |
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380 |
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Author |
Kashkarov R. |
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Title |
About mammals fauna (Carnivora and Artiodactyla) of Pskem Rivers basin |
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Miscellaneous |
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2002 |
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N 1-4. |
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150-158 |
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Uzbekistan; Pskem River basin; Bostandyk region; fauna; rare species; Carnivora; Artiodactyla; number; decline; snow leopard.; 7120; Russian |
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The article is based on the results of Transboundary project GEF expedition to the upper part of Pskem Rivers basin, July 27-Septeber 7, 2002. The past and present distribution and status of Carnivora and Artiodactyla is described using the gathered data and literature. There is a cadastre list with the place of the records for every species. For the most rare species a map-scheme is given/ |
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Full text available in RussianJournal Title: Selevinia. The zoological journal of Kazakhstan. |
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SLN @ rana @ 690 |
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523 |
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Author |
Khan, A. |
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Title |
Snow Leopard Occurrence in Mankial Valley, Swat: Final report |
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Report |
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2004 |
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1-17 |
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snow; snow leopard; snow-leopard; leopard; valley; Report; project; International; international snow leopard trust; International-Snow-Leopard-Trust; trust; program; ecosystem; habitat; species; plants; plant; Animals; Animal; birds; research; action; study; survey; Support; Islt; community; Organization; surveys; winter; information; local; sign; pugmarks; feces; scrapes; scrape; prey; prey species; prey-species; recent; population; markhor; hunting; Culture; Pressure; areas; area; feeding; livestock; burning; decline |
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Mankial is a sub-valley of the Swat Kohistan. Temperate ecosystem of the valley is intact to a greater extent, which provides habitat to a variety of species of plants, animals and birds. Snow leopard is reported from the valley. To confirm its occurrence, the HUJRA (Holistic Understanding for Justified Research and Action), conducted the study titled “Snow Leopard Survey in Mankial Valley, district Swat, NWFP”. The author provided technical support, while ISLT (The International Snow Leopard Trust) funded the project under its small grants program. The World Wide Fund for Nature-Pakistan (WWF-Pakistan) and the Mankial Community Organization (MCO) facilitated surveys under the project. Surveys revealed that Snow leopard visits parts of the Mankial valley in winter months. Information from the local community shows that Snow leopard remains in the Serai (an off-shoot of the Mankial Valley) from early winter to early spring. Intensive surveys of the prime snow leopard winter habitat in the valley found several snow leopard signs including pugmarks, feces, and scrapes. The study also found occurrence of prey species through indirect evidence though. However, information from the local community confirmed that in the recent past there was a good population of markhor in the valley, which is now reduced to less than 50, mostly due to hunting and habitat disturbance. Hunting is part of the local culture and lifestyle. During winter months hunting pressure is low, as most of the local community migrates to warmer plain areas than Mankial Valley. However, those who live in the area lop oak branches for feeding their livestock and cut trees for burning, in addition to hunting prey species of snow leopard. This has resulted in stunted oak vegetation in most of the lower reaches of the valley and decline of the markhor population. |
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Project funded by International Snow Leopard Trust Small Grants Program, 2003. |
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Call Number |
SLN @ rana @ 1069 |
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530 |
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Author |
Kydyraliev A.K. |
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Title |
Some animal species' habitat alteration in the Central Tien Shan |
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Miscellaneous |
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1970 |
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Part 1. |
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46-48 |
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Kyrgyzstan; tien shan; human influence; water conservation activity; decline; range; number; birds; mammals; game species; moral; argali; snow leopard.; 7540; Russian |
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Irrigation and drainage activity in Tien Shan led some bird species to disappear. Number of species to build their nests in tree holes has dropped. Mongolian sandpiper and black-bellied sand grouse disappeared in the steppe areas. Great bustard, formerly nesting in this area, can now be rarely seen only in migration. The direct anthropogenic influence resulted in shrinkage of game animal and bird populations such as moral, goitered gazelle, argali, snow leopard, and stone marten. |
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Full text available in RussianJournal Title: Influence of anthropogenic factors on the formation of zoogeographic complexes. The fifth inter-school zoogeographic conference. |
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Call Number |
SLN @ rana @ 732 |
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605 |
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Author |
Plyaskin V.E. |
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Rare Felidae species in the Chatkal valley of the West Tien Shan |
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Miscellaneous |
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1982 |
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41-42 |
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Kyrgyzstan; Besh-Aral nature reserve; Cats; snow leopard; Lynx; manul; species range; diet; decline; illegal hunting.; 7910; Russian |
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In 1981, rare Felidae species such as snow leopard, Turkistan lynx, and manul (one encounter recorded) were found in the Besh-Aral nature reserve (the Chatkal valley). Illegal hunting and high concentration of people in some places is emphasized to impact the animal populations. |
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Full text available in RussianJournal Title: Protection and reproduction of fauna. |
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SLN @ rana @ 769 |
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775 |
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Sokov A.I. |
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Title |
Environmental prerequisites for protection and sustainable use of predatory mammals in Tajikistan |
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1986 |
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Vol. 3. |
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27-29 |
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Tajikistan; Red Data book; rare species; carnivores; large predators; brown bear; hyena; tiger; leopard; Lynx; snow leopard; decline; protection; sustainable use.; 8220; Russian |
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In Tajikistan it is necessary to preserve big predators listed in the Red Book, such as Uncia uncia, Ursus arctos isabellinus, Hyaena hyaena, Felis lynx isabellina, Panthera pardus ciscaucasica. An anthropogenic influence has resulted in the species' habitat shrinkage, deficit of food, disturbance of trophic interactions. It is necessary to restore a tiger population in the Tigrovaya Balka nature reserve, and resolve the issue of protection and sustainable use of commercial predatory species. |
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Full text available in RussianJournal Title: Proceedings of IV Congress of all-Union mammalists' society. |
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SLN @ rana @ 800 |
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913 |
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Sokov A.I. |
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Snow leopard |
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1997 |
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151-152 |
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Tajikistan; Red Data book; snow leopard; decline; protection; distribution; number; life-history; protected measures.; 8230; Russian |
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Snow leopard distributed in Pamir, Mountain Badakhshan (2500-5500 masl). Its number assessed as 250-350 individuals. There were recorded 450 snow leopards in 1950s-1960s. |
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Full text available in RussianJournal Title: Red Data Book of Tajikistan. |
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SLN @ rana @ 801 |
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914 |
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Suryawanshi, K.R. |
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Towards snow leopard prey recovery: understanding the resource use strategies and demographic responses of bharal Pseudois nayaur to livestock grazing and removal; Final project report |
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2009 |
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1-43 |
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project; snow; snow leopard; snow-leopard; leopard; network; conservation; program; prey; recovery; resource; use; strategy; demographic; Response; bharal; Pseudois; pseudois nayaur; Pseudois-nayaur; nayaur; livestock; grazing; Report; decline; wild; populations; population; Himalayan; region; Competition; threats; threat; uncia; Uncia uncia; Uncia-uncia; study; diet; winter; Test; browse; nutrition; areas; area; young; Female; times; High; Adult; mortality; species; predators; predator; endangered; trans-himalaya; transhimalaya |
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Decline of wild prey populations in the Himalayan region, largely due to competition with livestock, has been identified as one of the main threats to the snow leopard Uncia uncia. Studies show that bharal Pseudois nayaur diet is dominated by graminoids during summer, but the proportion of graminoids declines in winter. We explore the causes for the decline of graminoids from bharal winter diet and resulting implications for bharal conservation. We test the predictions generated by two alternative hypotheses, (H1) low graminoid availability caused by livestock grazing during winter causes bharal to include browse in their diet, and, (H2) bharal include browse, with relatively higher nutrition, to compensate for the poor quality of graminoids during winter. Graminoid availability was highest in areas without livestock grazing, followed by areas with moderate and intense livestock grazing. Graminoid quality in winter was relatively lower than that of browse, but the difference was not statistically significant. Bharal diet was dominated by graminoids in areas with highest graminoid availability. Graminoid contribution to bharal diet declined monotonically with a decline in graminoid availability. Bharal young to female ratio was three times higher in areas with high graminoid availability than areas with low graminoid availability. No starvation-related adult mortalities were observed in any of the areas. Composition of bharal winter diet was governed predominantly by the availability of graminoids in the rangelands. Since livestock grazing reduces graminoid availability, creation of livestock free areas is necessary for conservation of grazing species such as the bharal and its predators such as the endangered snow leopard in the Trans-Himalaya. |
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Project funded by Snow Leopard Network's Snow Leopard Conservation Grant Program, 2008. Nature Conservation Foundation, Mysore. Post-graduate Program in Wildlife Biology and Conservation, National Centre for Biological Sciences, Wildlife Conservation Society -India program, Bangalore, India. |
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SLN @ rana @ 1077 |
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952 |
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