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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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Year |
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 |
Brunstein, L. |
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Title |
Handrearing Snow Leopards in the Cheyenne Mountain Zoo |
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1978 |
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Int.Ped.Book of Snow Leopards |
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1 |
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44-49 |
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hand-rearing; hand; rearing; cubs; bottle; feeding; diet; browse; 3580 |
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SLN @ rana @ 43 |
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200 |
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Author |
Burgener, N.; Gusset, M.; Schmid, H. |
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Title |
Frustrated appetitive foraging behavior, stereotypic pacing, and fecal glucocorticoid levels in snow leopards (Uncia uncia) in the Zurich Zoo |
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Miscellaneous |
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2008 |
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Journal of Applied Animal Welfare Science |
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11 |
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74-83 |
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behavior; captive; fecal; feeding strategy; physiological; snow leopard; zoo |
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This study hypothesized that permanently frustrated, appetitive-foraging behavior caused the stereotypic pacing regularly observed in captive carnivores. Using 2 adult female snow leopards (Uncia uncia), solitarily housed in the Zurich Zoo, the study tested this hypothesis experimentally with a novel feeding method: electronically controlled, time-regulated feeding boxes. The expected result of employing this active foraging device as a successful coping strategy was reduced behavioral and physiological measures of stress, compared with a control-feeding regime without feeding boxes. The study assessed this through behavioral observations and by evaluating glucocorticoid levels noninvasively from feces. Results indicated that the 2 snow leopards did not perform successful coping behavior through exercising active foraging behavior or through displaying the stereotypic pacing. The data support a possible explanation: The box-feeding method did not provide the 2 snow leopards with the external stimuli to satisfy their appetitive behavioral needs. Moreover, numerous other factors not necessarily or exclusively related to appetitive behavior could have caused and influenced the stereotypic pacing. |
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SLN @ rana @ 915 |
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202 |
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Author |
Fox, J.L.; Chundawat, R.S. |
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Title |
Observations of snow leopard stalking, killing and feeding behavior |
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1988 |
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Mammalia |
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52 |
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1 |
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137-140 |
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India; stalking; killing; feeding; behavior; observations; browse; 850 |
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Full Text at URLDocument Type: English |
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SLN @ rana @ 99 |
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292 |
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Hongguang, H.; Yongfu, X. |
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Title |
Captive snow leopards in the Chongqing Zoo |
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1994 |
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191-193 |
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China; zoos; captivity; cage; food; feeding; diet; management; zoo; browse; 3390 |
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Islt |
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Usa |
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J.L.Fox; D.Jizeng |
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Full Text at URLTitle, Monographic: Seventh International Snow Leopard SymposiumPlace of Meeting: ChinaDate of Copyright: 1994 |
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Call Number |
SLN @ rana @ 228 |
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389 |
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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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Keywords |
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 |
Lilin, Z. |
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Title |
Captive rearing of a wild snow leopard cub in the Xining Zoo, China |
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1994 |
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177-182 |
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Keywords |
zoos; captivity; zoo; husbandry; rearing; distribution; diet; food; feeding; young; cubs; reproduction; breeding; mating; China; browse; 3700 |
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Islt |
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Usa |
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J.L.Fox; D.Jizeng |
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Full text at URLTitle, Monographic: Seventh International Snow Leopard SymposiumPlace of Meeting: ChinaDate of Copyright: 1994 |
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Call Number |
SLN @ rana @ 245 |
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619 |
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Author |
Marma B.B.and Yunchis V.V. |
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Title |
A contribution to biology of the Snow-leopard (Panthera uncia uncia) (by observations in captivity) |
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Miscellaneous |
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1968 |
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XLVII, issue 11. |
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1689-1694 |
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Lithuania; Kaunas zoological garden; breeding; blood characteristics; physiological characteristics; captivity; duration of pregnancy; birth; cubs; feeding; snow leopard.; 7610; Russian |
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The methods to obtain the progeny of the snow leopard (Panthera uncia uncia) in captivity were being elaborated in the zoological garden of Kaunas, Lithuanian SSR. The blood characteristics for snow leopards is given and compared to that for African lions and Sumatrian tigers. A series of internal, external and clinical indices is established. The rat lasts for 5-7 day, the duration of pregnancy equals 98 days. The duration of lactation varies from 3 to 4 months. Sexual maturity is attained on the 3rd-4th year. From 1960 to 1967 in zoological garden of the world about 29 snow leopards were born, 14 of them in the Kaunas zoological garden. |
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Full text available in RussianJournal Title: Zoological journal |
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SLN @ rana @ 739 |
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648 |
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Rana, B.S. |
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Distinguishing kills of two large mammalian predators in Spiti Valley Himachal Pradesh |
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1997 |
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J.Bombay Nat.Hist.Soc |
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94 |
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3 |
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553 |
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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 |
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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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Document Type: English |
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SLN @ rana @ 326 |
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804 |
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Seidensticker, J.; Lumpkin, S. |
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The adaptable leopard; unfortunately it's no match for modern man |
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1996 |
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Wildlife Conservation |
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99 |
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3 |
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52 |
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predator; prey; poaching; hunting; behavior; feeding; conflict; habitat; browse; 1130 |
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Abstract: Leopards' adaptability has become the species' vulnerability. The animals do not hesitate to eat rotting flesh and will come back repeatedly to their meal, if disturbed. People have taken advantage of this by lacing carcasses with poison. Leopards are moderate in size compared to other cats, are stealthy and can live in areas as diverse as rain forests and deserts. |
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Document Type: English |
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SLN @ rana @ 291 |
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876 |
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