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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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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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Author |
Fedosenko A.K. |
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Title |
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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Fox, J.L. |
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Conflict between predators and people in Ladakh |
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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
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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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Title |
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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Namgail, T.; Fox, J.; Bhatnagar, Y.V. |
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Habitat segregation between sympatric Tibetan argali Ovis ammon hodgsoni and blue sheep Pseudois nayaur in the Indian Trans-Himalaya |
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2004 |
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Journal of Zoology |
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262 |
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57-63 |
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argali; Ovis ammon hodgsoni; blue sheep; pseudois nayaur; Habitat selection; resource partitioning; niche relationship; 5200 |
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Tibetan argali Ovis ammon hodgsoni and blue sheep Pseudois nayaur have almost completely overlapping distributions encompassing most of the Tibetan plateau and its margins. Such a sympatric distribution of related species with similar ecological requirements implies that there is some degree of resource partitioning. This may be accomplished on the basis of habitat and/or diet separation. This study evaluated such ecological separation on the basis of physical habitat partitioning by these two sympatric ungulates in Hemis High Altitude National Park, Ladakh, India, in an area where the argali established a small new population in 1978. Such separation was tested for
on the basis of expected difference between the species in their proximity to cliffs, associated with species-specific anti-predator behaviour. Tibetan argali selected habitats away from cliffs while blue sheep selected habitats close to cliffs. Blue sheep also selected steep slopes whereas argali selected gentle slopes. The two species did not differ
in their use of habitats in terms of elevation. They did, however, differ in their use of plant communities; blue sheep selected sub-shrub and grass-dominated communities whilst argali selected forb-dominated communities. We suggest that the two species coexist in this site as a result of the differential use of habitat associated with their
species-specific anti-predator strategies. |
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Full text available at URL |
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SLN @ rana @ 505 |
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710 |
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Pollock, R.V.; Carmichael, L.E. |
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Use of modified live feline panleukopenia virus vaccine to immunize dogs against canine parvovirus |
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1983 |
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Am J Vet Res |
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44 |
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2 |
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169-175 |
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Animal; Antibodies; Viral; biosynthesis; Dog; Diseases; microbiology; prevention; control; Dogs; Dose; Response; Relationship; Immunologic; Parvoviridae; immunology; Parvovirus; Feline; growth; development; Support; Non-U.S.Gov't; Vaccines; Attenuated; Virus; veterinary; Replication; browse; 350 |
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Modified live feline panleukopenia virus (FPLV) vaccine protected dogs against canine parvovirus (CPV) infection. However, unlike the long- lived (greater than or equal to 20-month) immunity engendered by CPV infection, the response of dogs to living FPLV was variable. Doses of FPLV (snow leopard strain) in excess of 10(5.7) TCID50 were necessary for uniform immunization; smaller inocula resulted in decreased success rates. The duration of immunity, as measured by the persistence of hemagglutination-inhibiting antibody, was related to the magnitude of the initial response to vaccination; dogs with vigorous initial responses resisted oronasal CPV challenge exposure 6 months after vaccination, and hemagglutination-inhibiting antibodies persisted in such dogs for greater than 1 year. Limited replication of FPLV in dogs was demonstrated, but unlike CPV, the feline virus did not spread to contact dogs or cats. Adverse reactions were not associated with living FPLV vaccination, and FPLV did not interfere with simultaneous response to attenuated canine distemper virus. |
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0002-9645 |
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Document Type: eng |
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SLN @ rana @ 69 |
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784 |
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