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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 |
Publication |
Evolutionary Ecology Research, |
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9 |
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1263-1276 |
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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 |
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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 |
Kogan M.I. |
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Title |
The Kazakh SSR. The Kyrgyz SSR. The Uzbek and Tajik SSR. The Turkmen SSR |
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Miscellaneous |
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Year |
1931 |
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47, 51-52,55-57, 59, 61-62. |
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Central Asia; game species; fur-trade; snow leopard.; 7160; Russian |
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It describes geographical, soil, climatic and hydrological features of Kazakhstan, Kyrgyzstan, Uzbekistan, and Tajikistan. Types of economic activities including fur-trade are described, too. Game preserves are classified, and list of game fauna species inhabiting these republics is given. Snow leopard lives in rocky mountains and is hunted very rarely. |
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Full text available in RussianJournal Title: Soviet Asia as a fur-trade region. |
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Call Number |
SLN @ rana @ 694 |
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540 |
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Author |
Kolosov A.M. |
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Title |
Central Asia |
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Miscellaneous |
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1975 |
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93-104 |
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Central Asia; mountain system; species composition; distribution; number; habitats; rare species; endemics; game species; mammals; snow leopard.; 7190; Russian |
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It describes a mammal species composition in the mountain ecosystems of Central Asia Kopetdag, Hissaro-Alai and Pamir, Tien Shan, and Tarbagatai ridge. Data on distribution and population number is presented. |
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Full text available in RussianJournal Title: Protection and enrichment of the USSR fauna. |
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Call Number |
SLN @ rana @ 697 |
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546 |
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Author |
Stockley, G. |
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Title |
Stalking in the Himalayas and Northern India |
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1936 |
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Himalaya; India; hunting; big-game; browse; big game; big; game; 2010 |
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Herbert Jenkins |
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London |
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SLN @ rana @ 13 |
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939 |
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Author |
Stockley, G. |
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Title |
Big Game Shooting In the Indian Empire |
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1928 |
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hunting; big-game; India; browse; big; game; 2000 |
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Constable |
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London |
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SLN @ rana @ 12 |
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938 |
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Author |
Burrard, G. |
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Title |
Big Game Hunting in the Himalayas and Tibet |
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1925 |
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hunting; big-game; Tibet; Himalayas; browse; big; game; 1860 |
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H. Jenkinns |
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London |
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SLN @ rana @ 11 |
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203 |
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Author |
Chichikin Yu.N. |
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Title |
Ways to enrich game fauna of Kyrgyzstan |
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Miscellaneous |
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1968 |
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33-39 |
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Kyrgyzstan; game species; birds; mammals; snow leopard.; 6450; Russian |
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In Kyrgyzstan, there are 106 mammal and 111 bird species. 40 mammal and 70 bird species are game ones. Resources of some of them were undermined due to over-hunting. Moral, goitered gazelle, pheasant have disappeared; argali, roe deer, and wild boar have become not numerous. In order to protect game fauna and regulate hunting of wild animals, hunting was prohibited at lake Issyk-Kul (1948); hunting for moral, goitered gazelle, swan, bar-headed goose, pheasant, snow leopard, bear, and argali was prohibited too (1952, 1956 and 1958). |
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Full text available in RussianJournal Title: Love and protect nature of Kyrgyzstan. |
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Call Number |
SLN @ rana @ 623 |
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218 |
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Author |
Yanushevich A.I. |
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Title |
Status of hunting industry in Kyrgyzstan |
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Miscellaneous |
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1969 |
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Part. II. |
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110-113 |
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Kyrgyzstan; game species; fur-trade; snow leopard.; 8600; Russian |
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In Kyrgyz SSR, there are 26 fur animal species, including three acclimatized, six wild ungulate and 70 bird species. They all can serve as objects of commercial and sport hunting. 56 snow leopards, 120 wild boars, 96 roe-deers, 121 ibexes, and 14 argalis were caught 1962 1967. A majority of the animals were exported from the country. The Kyrgyz SSR is one of the main suppliers of snow leopards, hunting for which for the sake of its fur-skin is prohibited. |
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Full text available in RussianJournal Title: Proceedings of conference “Capacity and production of game preserves in the USSR”. |
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Call Number |
SLN @ rana @ 837 |
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1053 |
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Author |
Kydyraliev A.K. |
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Title |
Some animal species' habitat alteration in the Central Tien Shan |
Type |
Miscellaneous |
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1970 |
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Part 1. |
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46-48 |
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Keywords |
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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Mongolian Biosphere & Ecology Association |
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Title |
Mongolian Biosphere & Ecology Association Report March 2010 |
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Manuscript |
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2010 |
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Keywords |
nature; tourism; surveys; survey; snow; snow leopards; snow leopard; snow-leopards; snow-leopard; leopards; leopard; attack; domestic; Animals; Animal; illegal; illegal hunting; hunting; territory; province; 2010; hunt; 1990; movements; movement; pasture; desert; number; species; birds; river; mountain; hunters; hunter; recent; government; structure; management; national; central; people; Report; gobi; Gobi Desert; reproduction; Adult; meat; food; ibex; wild; wild sheep; sheep; marmot; nutrition; schools; population; use; local; big; big game; big-game; game; 310; mountains; wolves; wolf; Seasons; times; zones; global; Mongolia; 40; history; ecology |
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In accordance with order of the Ministry of Nature and Tourism,
zoologists of our association have made surveys in three ways such as
reasons why snow leopards attack domestic animals, “Snow leopard” trial
operation to count them and illegal hunting in territories of Khovd,
Gobi-Altai, Bayankhongor, Uvurkhangai and Umnugobi provinces from
September 2009 to January 2010. As result of these surveys it has made
the following conclusions in the followings: Reason to hunt them illegally: the principal reason is that
administrative units have been increased and territories of
administrative units have been diminished. There have been four
provinces in 1924 to 1926, 18 since 1965, 21 since 1990. Such situation
limits movements of herdsmen completely and pastures digressed much than
ever before. As result of such situation, 70% of pastures become desert.
Such digression caused not only heads of animals and also number of
species. Guarantee is that birds such as owls, cuckoo, willow grouse in
banks of Uyert river, Burkhanbuudai mountain, located in Biger soum,
Gobi-Altai province, which are not hunted by hunters, are disappearing
in the recent two decades. For that reason we consider it is urgently
necessary for the government to convert administrative unit structures
into four provinces. This would influence herdsmen moving across
hundreds km and pastures could depart from digression.
Second reason: cooperative movement won. The issues related to management and strengthening of national
cooperatives, considered by Central Committee of Mongolian People's
Revolutionary Party in the meeting in March 1953 was the start of
cooperatives' movement. Consideration by Yu. Tsedenbal, chairman of
Ministers Council, chairman of the MPRP, on report “Result of to unify
popular units and some important issues to maintain entity management of
agricultural cooperatives” in the fourth meeting by the Central
Committee of Mongolian People's Revolutionary Party /MPRP/ on December
16-17, 1959, proclaimed complete victory of cooperative. At the end of
1959, it could unify 767 small cooperative into 389 ones, unify 99.3 %
of herdsmen and socialize 73.3 % of animals. The remaining of animals
amount 6 million 163 thousands animals, and equals to 26.7% of total
animals. This concerned number of animals related to the article
mentioned that every family should have not more that 50 animals in
Khangai zone and not more 75 animals in Gobi desert. It shows that such
number could not satisfy needs of family if such number is divided into
five main animals in separating with reproduction animals and adult
animals. So herdsmen started hunt hoofed animals secretly and illegally
in order to satisfy their meat needs. Those animals included main food
of snow leopard such as ibex, wild sheep, and marmot. Third reason is that the state used to hunt ibex, which are main
nutrition of snow leopards, every year. The administrative unit of the
soum pursued policy to hunt ibex in order to provide meat needs of
secondary schools and hospitals. That's why this affected decrease of
ibex population. Preciously from 1986 to 1990 the permissions to hunt
one thousands of wild sheep and two thousands of ibexes were hunt for
domestic alimentary use every year. Not less than 10 local hunters of every soum used to take part in big
game of ibexes. Also they hunted many ibexes, chose 3-10 best ibexes and
hid them in the mountains for their consummation during hunting.
Fourth reason: hunting of wolves. Until 1990 the state used to give
prizes to hunter, who killed a wolf in any seasons of the year. Firstly
it offered a sheep for the wolf hunter and later it gave 25 tugrugs /15
USD/. Every year, wolf hunting was organized several times especially
picking wolf-cubs influenced spread and population of wolves. So snow
leopard came to the places where wolves survived before and attack
domestic animals. Such situation continued until 1990. Now population of
ibexes has decreased than before 1990 since the state stopped hunting
wolves, population of wolves increased in mountainous zones. We didn't
consider it had been right since it was natural event. However
population of ibexes decreased. Fifth reason: Global warming. In recent five years it has had a drought
and natural disaster from excessive snow in the places where it has
never had such natural disasters before. But Mongolia has 40 million
heads of domestic animals it has never increased like such quantity in
its history before. We consider it is not incorrect that decrease of
domestic animals could give opportunities to raise population of wild
animals. Our next survey is to make attempt to fix heads of snow leopards
correctly with low costs. |
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Call Number |
SLN @ rana @ 1100 |
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705 |
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