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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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Author |
Aryal, A. |
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Title |
Final Report On Demography and Causes of Mortality of Blue Sheep (Pseudois nayaur) in Dhorpatan Hunting Reserve in Nepal |
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Report |
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2009 |
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1-53 |
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Report; mortality; blue; blue sheep; blue-sheep; sheep; Pseudois; pseudois nayaur; Pseudois-nayaur; nayaur; Dhorpatan; hunting; reserve; Nepal; biodiversity; research; training; snow; snow leopard; snow-leopard; leopard; conservation; program; population; Population-Density; density; densities; change; Sex; study; area; High; poaching; Pressure; reducing; number; predators; predator; poison; wolf; wolves; canis; Canis-lupus; lupus; wild; wild boar; prey; prey species; prey-species; species; scats; scat; value; fox; cover; deer; diet; leopards; pika; snow leopards; snow-leopards; soil; Relationship |
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A total of 206 individual Blue sheep Pseudois nayaur were estimated in Barse and Phagune blocks of Dhorpatan Hunting Reserve (DHR) and population density was 1.8 Blue sheep/sq.km. There was not significant change in population density from last 4 decades. An average 7 animals/herd (SD-5.5) were classified from twenty nine herds, sheep per herds varying from 1 to 37. Blue sheep has classified into sex ratio on an average 75 male/100females was recorded in study area. The sex ratio was slightly lower but not significantly different from the previous study. Population of Blue sheep was seen stable or not decrease even there was high poaching pressure, the reason may be reducing the number of predators by poison and poaching which has
supported to increase blue sheep population. Because of reducing the predators Wolf Canis lupus, Wild boar population was increasing drastically in high rate and we can observed wild boar above the tree line of DHR. The frequency of occurrence of different prey species in scats of different predators shows that, excluding zero values, the frequencies of different prey species were no significantly different (ö2= 10.3, df = 49, p > 0.05). Most of the scats samples (74%) of Snow leopard, Wolf, Common Leopard, Red fox's cover one prey species while two and three species were present in 18% and 8%, respectively. Barking deer Muntiacus muntjak was the most frequent (18%) of total diet composition of common leopards. Pika Ochotona roylei was the most frequent (28%), and Blue sheep was in second position for diet of snow leopards which cover 21% of total diet composition. 13% of diet covered non-food item such as soil, stones, and vegetable. Pika was most frequent on Wolf and Red fox diet which covered 32% and 30% respectively. There was good positive relationship between the scat density and Blue sheep consumption rate, increasing the scat density, increasing the Blue sheep consumption rate. Blue sheep preference by different predators such as Snow leopard, Common leopard, Wolf and Red fox were 20%, 6%, 13% and 2% of total prey species respectively. |
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The Biodiversity Research and Training Forum (BRTF) Nepal. Email: savefauna@yahoo.com
Submitted to Snow Leopard Conservation Grants Program, USA. |
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SLN @ rana @ 1064 |
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104 |
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Bhatia, S., Suryawanshi, K., Redpath, S. M., Mishra, C |
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Understanding people's responses toward predators in the Indian Himalaya |
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2020 |
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Animal Conservation |
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1-8 |
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human-wildlife conflict; human attitudes to wildlife; value orientation; carnivores; tolerance; human-wildlife relationships; risk perception; Himalaya |
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Research on human–wildlife interactions has largely focused on the magnitude of wildlife‐caused damage, and the patterns and correlates of human attitudes and behaviors. We assessed the role of five pathways through which various correlates potentially influence human responses toward wild animals, namely, value orientation, social interactions (i.e. social cohesion and support), dependence on resources such as agriculture and livestock, risk perception and nature of interaction with the wild animal. We specifically evaluated their influence on people's responses toward two large carnivores, the snow leopard Panthera uncia and the wolf Canis lupus in an agropastoral landscape in the Indian Trans‐Himalaya. We found that the nature of the interaction (location, impact and length of time since an encounter or depredation event), and risk perception (cognitive and affective evaluation of the threat posed by the animal) had a significant influence on attitudes and behaviors toward the snow leopard. For wolves, risk perception and social interactions (the relationship of people with local institutions and inter‐community dynamics) were significant. Our findings underscore the importance of interventions that reduce people's threat perceptions from carnivores, improve their connection with nature and strengthen the conservation capacity of local institutions especially in the context of wolves. |
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1630 |
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Fedosenko A.K. |
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Relationship between the predators and wild ungulates in North Tien Shan and Jungar Alatau |
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1979 |
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72-74 |
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Kazakhstan; predators-preys relationship; snow leopard; preys.; 6670; Russian |
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Ibex is a main prey for snow leopards. The role of marmots and snow cocks in snow leopard's consumption is negligent. It can prey on morals in the fir-wood. A case of snow leopard's attacking a dog is also known. |
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Full text available in RussianJournal Title: Ecologic fundamentals of protection and sustainable use of predatory mammals. |
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SLN @ rana @ 645 |
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270 |
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Ferretti, F., Lovari, S., Minder, I., Pellizzi, B. |
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Recovery of the snow leopard in Sagarmatha (Mt.Everest) National Park: effects on main prey |
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2014 |
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European Journal of Wildlife Research |
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60 |
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559-562 |
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Predator–prey relationships . Small populations . Snow leopard . Himalayan tahr |
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Consequences of predation may be particularly
heavy on small populations of herbivores, especially if they
are threatened with extinction. Over the 2006–2010 period, we
documented the effects of the spontaneous return of the endangered
snow leopard on the population of the vulnerable
Himalayan tahr. The study area was an area of central
Himalaya where this cat disappeared c. 40 years before, because
of persecution by man. Snow leopards occurred mainly
in areas close to the core area of tahr distribution. Tahr was the
staple (56.3 %) of snow leopards. After the arrival of this cat,
tahr decreased by more than 2/3 from 2003 to 2010 (mainly
through predation on kids). Subsequently, the density of snow
leopards decreased by 60%from2007 to 2010. The main prey
of snow leopards in Asia (bharal, marmots) were absent in our
study area, forcing snow leopards to specialize on tahr. The
restoration of a complete prey spectrum should be favoured
through reintroductions, to conserve large carnivores and to
reduce exploitation of small populations of herbivores, especially
if threatened. |
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SLN @ rakhee @ |
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1408 |
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Fox, J.L. |
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Conflict between predators and people in Ladakh |
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Journal Article |
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1997 |
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Cat News |
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17 |
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18 |
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asia; India; behavior; endangered; threatened-species; mammals; management; predation; public relations; reserves; refuges; parks; wildlife; human-relationships; livestock; sheep; goats; prey; International-Snow-Leopard-Trust; protected-area; Hemis; browse; Islt; International; snow; leopard; trust; public; Relations; Human; relationships; protected; 640 |
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During a six-week period in Hemis National Park, Ladakh, India, snow leopards killed 10 sheep and goats and one leopard gained access to a livestock pen and killed many of the animals inside. Dholes also killed sheep and goats, and a wolf killed a young horse. Residents routinely remove snow leopard cubs from their dens to limit future damage by this species. How to deal with the plight of the people living in the area while still protecting the endangered species are major concerns of the International Snow Leopard Trust, which manages Hemis National Park. lgh. |
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AUTHOR ADDRESS: Dep. Ecol./Zool., IBG Univ. Tromso, Tromso, Norway, ORIGINAL SOURCE: Snow Leopard News, Autumn 1997
Document Type: English
Call Number: WR99-007446 |
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SLN @ rana @ 309 |
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310 |
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Guerrero, D. |
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Animal behavior concerns & solutions: snow leopard (Uncia uncia) evaluation, zoo |
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1998 |
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Anim.Keepers' Forum |
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25 |
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2 |
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56-58 |
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aggressive-behavior; behavior; captive-animal-care; diets; endangered; threatened-species; genetics; handling-methods; intraspecies-relationships; social-behavior; husbandry; zoos; snow leopard; aggressive; captive; Animal; care; threatened; species; handling; methods; intraspecies; relationships; social; browse; 1310 |
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The author offers advice on how a captive-raised snow leopard cub could be acclimated to humans so it could be used as a zoo “ambassador”. The cub had negative experiences with humans and lacked socialization with other animals and conspecifics. Methods of avoiding and redirecting the cub's aggressive behavior are suggested. lgh. |
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Ark Anim., Inc., P.O. Box 1154, Escondido, CA 92033-1154. e-mail: arkabc@arkanimals.com
Document Type: English |
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SLN @ rana @ 338 |
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358 |
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Jackson, P. |
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Title |
Villagers save predatory snow leopard |
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1998 |
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Cat News |
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28 |
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12 |
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conservation education; damage; damage by wildlife; endangered; threatened species; mammals; management; wildlife; human relationships; relocation; goats; livestock; Pakistan; herders; prey; panthera uncia; browse; conservation; education; threatened; species; Human; relationships; panthera; uncia; 570 |
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A short report is presented on the capture and relocation of a snow leopard in northern Pakistan. Villagers discovered the leopard attacking their goats and captured it. WWF-Gilgit relocated the leopard to a remote area. slj. |
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AUTHOR ADDRESS: 1172 Bougy, Switzerland. tel/fax: +41 (021) 808-6012; e-mail: pjackson@iprolink.ch
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SLN @ rana @ 336 |
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430 |
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Jackson, R. |
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Pakistan's Community-based Trophy Hunting Programs and Their Relationship to Snow Leopard Conservation |
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2004 |
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Pakistan; community-based; hunting; programs; program; Relationship; snow; snow leopard; snow-leopard; leopard; conservation; network |
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In June-July 2004, the Snow Leopard Conservancy (SLC) recently conducted field visits to three important snow leopard sites in Pakistan's Northern Areas: Hushey and Skoyo villages in Baltistan and the Khunjerab Village Organization (KVO) in Gojal. The purpose was to launch environmentally appropriate small-scale, village-based conservation and depredation alleviation initiatives aimed at protecting snow leopards, prey species, their habitats and associated mountain biodiversity, while benefiting humans at the same time. |
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For consideration by The Snow Leopard Network (SLN) Committee on Position Statements |
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SLN @ rana @ 1024 |
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472 |
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Jackson, R.M.; Ahlborn, G.; Gurung, M.; Ale, S. |
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Reducing livestock depredation losses in the Nepalese Himalaya |
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1996 |
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Proc.Vertebr.Pest Conf |
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17 |
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241-247 |
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damage; damage-by-wildlife; endangered; threatened species; livestock; mammals; management; predator-control; public-relations; wildlife; livestock-relationships; Nepal; asia; herders; conservation; Manang; Khangshar; depredation; conflict; predator; prey; browse; public; threatened; species; control; Relations; 700 |
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The authors investigated livestock depredation patterns of snow leopards on the northern slopes of the Himalayans near the villages of Manang and Khangshar, Nepal. Information is discussed on the relationships among livestock loss, endangered species management, public relations/conservation issues, and cooperative efforts among institutions involved in the decision making process. A plan is devised for alleviating livestock loss and protecting endangered species in the area. pcp |
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Full Text at URL: ADDRESS: Mountain Inst., Main & Dogwood St., Franklin, WV 26807//“Proceedings Seventeenth Vertebrate Pest Conference-March 5-7, 1996, Rohnert Park, California”; Timm, Robert M.; Crabb, A. Charles, editorsDocument Type: English |
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SLN @ rana @ 271 |
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480 |
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