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Author Shrestha, R.; Wegge, P. url 
  Title Wild sheep and livestock in Nepal Trans-Himalaya: coexistence or competition? Type Journal Article
  Year 2008 Publication (up) Environmental Conservation Abbreviated Journal  
  Volume 32 Issue 2 Pages 125-136  
  Keywords bharal; blue sheep; diet; food habits; mountain ungulates; Nepal; pastoralism; pseudois nayaur; rangeland management; resource partitioning  
  Abstract Excessive grazing by livestock is claimed to displace wild ungulates in the Trans-Himalaya. This study compares the seasonal diets and habitat use of sympatric wild naur Pseudois nayaur and domestic goat Capra hircus, sheep Ovis aries and free-ranging yak Bos grunniens in north Nepal and analyses their overlap both within and across seasons. Alpinemeadow and the legumes Oxytropis and Chesneya were critical resources for all animal groups. High overlap occurred cross-seasonally when smallstock (sheep and goats) in summer used the spring and autumn ranges of naur. Relatively high total ungulate biomass (3028 kg km-2) and low recruitment of naur (56 young per 100 adult females in autumn) suggested interspecific competition. The spatio-temporal heterogeneity in composition and phenology of food plants across the steep gradient of altitude, together with rotational grazing, appears to indirectly facilitate coexistence of naur and smallstock. However, owing to high crossseasonal (inter-seasonal) overlaps, competition is likely to occur between these two groups at high stocking densities. Within seasons, naur overlapped more with free-ranging yak than with smallstock. As their habitat use and diets were most similar in winter, when both fed extensively on the same species of shrubs, naur was most likely to compete with yak during that season.




 
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  Call Number SLN @ rana @ 936 Serial 890  
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Author Ale, S.; Brown, J. url 
  Title The contingencies of group size and vigilance Type Miscellaneous
  Year 2007 Publication (up) Evolutionary Ecology Research, Abbreviated Journal  
  Volume 9 Issue Pages 1263-1276  
  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  
  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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  Call Number SLN @ rana @ 886 Serial 53  
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Author Zhirjakov, V.A. url 
  Title On the ecology of the snow leopard in the Zailisky-Alatau (Northern Tien Shan) Type Journal Article
  Year 1990 Publication (up) Int Ped Book of Snow Leopards Abbreviated Journal  
  Volume 6 Issue Pages 25-30  
  Keywords Tien-Shan; ecology; China; browse; Kazakhstan; Russia; Soviet-Union; distribution; population; prey; behavior; food-habits; scat-analysis; 3240  
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  Notes Full text available at URL Approved no  
  Call Number SLN @ rana @ 168 Serial 1078  
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Author Rana, B.S. url 
  Title Distinguishing kills of two large mammalian predators in Spiti Valley Himachal Pradesh Type Journal Article
  Year 1997 Publication (up) J.Bombay Nat.Hist.Soc Abbreviated Journal  
  Volume 94 Issue 3 Pages 553  
  Keywords behavior; endangered; threatened species; foods; feeding; mammals; predation; wildlife; livestock relationships; snow leopard; Tibetan wolf; prey; livestock; India; panthera uncia; canis lupis; browse; threatened; species; relationships; tibetan; wolf; panthera; uncia; canis; lupis; 610  
  Abstract The author studied livestock killed by predators in the Spiti Valley, India, to determine what species had killed yaks, horses, donkeys, and other domestic animals. Eleven of the kills examined were made by snow leopards and six by the Tibetan wolf. Wolves were involved in surplus killings, while snow leopards kill as food is needed. lgh  
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  Notes Document Type: English Approved no  
  Call Number SLN @ rana @ 326 Serial 804  
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Author Shrestha, R.; Wegge, P. url 
  Title Determining the composition of herbivore diets in the Trans-Himalayan rangelands: A comparison of field methods Type Journal Article
  Year 2006 Publication (up) Journal of Rangeland Ecology and Management Abbreviated Journal  
  Volume 59 Issue 5 Pages 512-518  
  Keywords bite count; Bos grunniens; Capra hircus; diet; fecal analysis; feeding site examination; food habits; free ranging; Nepal; Ovis aries; trans-himalayan  
  Abstract In late summer, in a semi-arid mountain range in Nepal, we compared 3 field methods for determining the botanical composition of herbivore diets. Data were collected from the same animals belonging to 1 herd of domestic yak (Bos grunniens) and 2 herds of mixed smallstock, consisting of domestic goats (Capra hircus) and sheep (Ovis aries). Bite count, feeding site examination, and microhistological analysis of feces gave different estimates of forage categories and plant species in both animal groups. Because yaks grazed in other vegetation communities when not observed for bite-counts and feeding signs, the results from the latter methods could not be compared directly with that from fecal analysis. In smallstock, feeding site examination gave higher estimates of graminoids and lower estimates of shrubs than the other 2 methods, probably because all feeding signs on shrubs were not detected. Bite-counts and fecal analysis gave comparable results, except that forbs were underestimated by fecal analysis, presumably due to their more complete digestion. Owing to the difficulty in collecting samples that are representative of the entire grazing period and the problem of recording feeding signs correctly, both feeding site examination and bite-counts are unsuitable methods for studying the food habits of free ranging domestic and wild herbivores. Microhistological analysis of feces appears to be the most appropriate method, but correction factors are needed to adjust for differential digestion. The systematic use of photomicrographs improves the speed and accuracy of the fecal analysis.  
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  Call Number SLN @ rana @ 935 Serial 889  
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Author Lovari, S., Minder, I., Ferretti, F., Mucci, N., Randi, E., Pellizzi, B. url 
  Title Common and snow leopards share prey, but not habitats: competition avoidance by large predators Type Journal Article
  Year 2013 Publication (up) Journal of Zoology Abbreviated Journal  
  Volume 291 Issue Pages 127-135  
  Keywords coexistence; resource partitioning; food habits; Panthera uncia; Panthera pardus.  
  Abstract Resource exploitation and behavioural interference underlie competition among

carnivores. Competition is reduced by specializing on different prey and/or spatiotemporal

separation, usually leading to different food habits. We predicted that

two closely related species of large cats, the endangered snow leopard and the

near-threatened common leopard, living in sympatry, would coexist through

habitat separation and exploitation of different prey species. In central Himalaya,

we assessed (2006–2010) habitat and diet overlap between these carnivores. The

snow leopard used grassland and shrubland, whereas the common leopard

selected forest. Contrary to our prediction, snow leopard and common leopard

preyed upon similar wild (Himalayan tahr, musk deer) and domestic species (Bos

spp., dogs). Dietary overlap between snow leopard and common leopard was 69%

(yearly), 76% (colder months) and 60% (warmer months). Thus, habitat separation

should be the result of other factors, most likely avoidance of interspecific

aggression. Habitat separation may not always lead to the use of different prey.

Avoidance of interspecific aggression, rather than exploitation of different

resources, could allow the coexistence of potentially competing large predators.
 
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  Call Number SLN @ rakhee @ Serial 1402  
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Author Jumabay, K., Wegge, P., Mishra, C., Sharma, K url 
  Title Large carnivores and low diversity of optimal prey: a comparison of the diets of snow leopards Panthera uncia and wolves Canis lupus in Sarychat-Ertash Reserve in Kyrgyzstan Type Journal Article
  Year 2013 Publication (up) Oryx Abbreviated Journal  
  Volume Issue Pages 1-7  
  Keywords Canis lupus, Central Asia, food habits, intraguild competition, Panthera uncia, scat analysis  
  Abstract In the cold and arid mountains of Central Asia, where the diversity and abundance of wild ungulates

are generally low, resource partitioning among coexisting carnivores is probably less distinct than in prey-rich areas. Thus, similar-sized carnivores are likely to compete for food. We compared the summer diets of snow leopards Panthera uncia and wolves Canis lupus in Sarychat-Ertash Reserve in the Tien-Shan mountains of Kyrgyzstan, based on analysis of genetically confirmed scats. Abundances of

the principal prey species, argali Ovis ammon and Siberian ibex Capra sibirica, were estimated from field surveys. The diets consisted of few species, with high interspecific overlap (Pianka’s index50.91). Argali was the predominant prey, with .50% frequency of occurrence in both snow leopard and wolf scats. This was followed by Siberian ibex and marmots Marmota baibacina. Being largely unavailable, remains of livestock were not detected in any of the scats. In the snow leopard diet, proportions of argali and ibex were in

line with the relative availabilities of these animals in the Reserve. This was in contrast to the diet of wolf, where argali occurred according to availability and ibex was significantly underrepresented. The high diet overlap indicates that the two predators might compete for food when the diversity of profitable, large prey is low. Competition may be more intense in winter, when marmots are not available. Hunting of argali and ibex outside the Reserve may be unsustainable and therefore reduce their abundances over time. This will

affect both predators negatively and intensify competition for food. Reduction in ibex populations will directly affect the snow leopard, and the wolf is likely to be indirectly affected as a result of increased snow leopard predation of argali.
 
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  Notes Approved no  
  Call Number SLN @ rakhee @ Serial 1397  
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