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Author |
BOURDELLE E |
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Title |
La distribution geographique des equides actuels. |
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Year |
1949 |
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Abbreviated Journal |
3.Intern Zool Kongr |
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1948 |
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383-387 |
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Paris |
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from Professor Hans Klingels Equine Reference List |
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no |
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962 |
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Author |
Blaine G, |
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Title |
Notes on the zebras and some antelopes of Angola |
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Journal Article |
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Year |
1922 |
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Proc Zool Soc Lond |
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317 |
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1-8 |
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from Professor Hans Klingels Equine Reference List |
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no |
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946 |
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Author |
Leadbeater, E. |
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Title |
What evolves in the evolution of social learning? |
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Journal Article |
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Year |
2015 |
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Journal of Zoology |
Abbreviated Journal |
J Zool |
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Volume |
295 |
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1 |
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4-11 |
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Keywords |
social learning; associative learning; social information use |
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Abstract |
Social learning is fundamental to social life across the animal kingdom, but we still know little about how natural selection has shaped social learning abilities on a proximate level. Sometimes, complex social learning phenomena can be entirely explained by Pavlovian processes that have little to do with the evolution of sociality. This implies that the ability to learn socially could be an exaptation, not an adaptation, to social life but not that social learning abilities have been left untouched by natural selection. I discuss new empirical evidence for associative learning in social information use, explain how natural selection might facilitate the associative learning process and discuss why such studies are changing the way that we think about social learning. |
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1469-7998 |
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Equine Behaviour @ team @ |
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6015 |
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King, S.R.B.; Gurnell, J. |
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Scent-marking behaviour by stallions: an assessment of function in a reintroduced population of Przewalski horses (Equus ferus przewalskii) |
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2007 |
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Journal of Zoology |
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J Zool |
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272 |
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1 |
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30-36 |
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Abstract Scent marking is a common form of intraspecific communication in mammal species, and using faeces or urine is a cost-effective way of signalling competitive ability and resource holding power. Marking is ritually performed by male equids, and here we assess the function of male scent-marking behaviour in a recently introduced population of Przewalski horses Equus ferus przewalskii in Mongolia. Two forms of scent marking were observed: defecation on stud piles formed from repeated dunging in the same place, and overmarking of faeces and urine of mares. Stud piles were marked with dung by the harem holder and sniffed before and after dung was deposited. They were not found specifically at the periphery of harem ranges but occurred for the most part along routes used by the horses, and were more common in the core parts of harem ranges or where harem ranges overlapped. Thus, rather than being used to defend range boundaries, stud piles were placed predominantly where they would be encountered by male intruders. Mare excreta were covered with urine by the stallion, but were only sniffed before they were marked, not after. These marks appear to advertise to the mare and other, intruding stallions that the harem holder was the mare's consort and that the interloper should not risk trying to steal the mare or sneak a mating. Thus, the two forms of marking by harem holders appear to combine as first and second lines of defence of paternity rights in male intrasexual competition. |
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Equine Behaviour @ team @ King2007 |
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2315 |
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Author |
de Villiers, M.S.; Richardson, P.R.K.; van Jaarsveld, A.S. |
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Title |
Patterns of coalition formation and spatial association in a social carnivore, the African wild dog (Lycaon pictus) |
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Journal Article |
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Year |
2003 |
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Journal of Zoology |
Abbreviated Journal |
J Zool |
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Volume |
260 |
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4 |
Pages |
377-389 |
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Keywords |
coalitions; social systems; Carnivora; Lycaon pictus |
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In many social species, relationships within groups seem to be non-random but related to variables such as rank, kinship or sexual attractiveness. The endangered African wild dog Lycaon pictus is a social carnivore that lives in large, stable packs, and intra-pack associations might be expected to display similar patterns. We investigated patterns of coalition formation (support during dominance interactions, and partnership interactions) and resting associations between members of a captive pack of 19 wild dogs. The social organization of the captive pack was similar to that of free-ranging packs in many respects. Polyadic (group) incidents of coalition support were also observed in a free-ranging pack. Patterns of coalition formation in the captive pack were related to rank. Most aggressive interactions involved high-ranking individuals (particularly the alpha, beta and third-ranking males) and coalitionary support tended to reinforce the existing hierarchy. However, there was at least one example of support influencing a successful rank challenge. Support was affected by potential risks and benefits, the latter including dominance through association and revolutionary alliances. An even stronger pattern overlaid associations between pack members: coalitions and resting associations were strongest between members of the same age–sex cohort, and may have enabled the eventual dominance of younger pack members over adults. Among adults, coalitionary associations were sometimes overridden by intersexual relationships. The results from this captive pack suggest that wild dogs are sensitive to differences in competitive ability. This information, in conjunction with strong affiliative bonds between littermates, is used to manoeuvre for position in the social hierarchy. It may also be important during dispersal, in encounters with other dispersing groups of the same sex. Although most features of the social structure of the captive pack were comparable to those of free-ranging packs, aspects such as the influence of relatedness on coalition formation still need to be explored. |
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Blackwell Publishing Ltd |
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1469-7998 |
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Equine Behaviour @ team @ |
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5249 |
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Author |
Berger J, |
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Title |
Predation, sex ratios, and male competition in equids |
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Journal Article |
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Year |
1983 |
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J Zool Lond |
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201 |
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205-216 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Call Number |
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Serial |
939 |
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Author |
Mace, G.M.; Harvey, P.H.; Clutton-Brock, T.H. |
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Title |
Brain size and ecology in small mammals |
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Journal Article |
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Year |
1981 |
Publication |
Journal of Zoology |
Abbreviated Journal |
J Zool |
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Volume |
193 |
Issue |
3 |
Pages |
333-354 |
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Abstract |
Relative brain size (measured as gross brain size after body size effects are removed) differs systematically between families of rodents, insectivores and lagomorphs. The Sciuridae have the largest relative brain size, the Soricidae and Bathyergidae the smallest. These results are discussed and compared with previous analyses of relative brain sizes among primates and bats. These differences complicate comparisons between relative brain size across phylogenetically diverse species and attempts to relate differences in relative brain size to ecological variables. To overcome these problems, best fit relationships were estimated for each family, and values for each genus were expressed as deviations from the lines of best fit. We refer to these values as Comparative Brain Size (CBS). Differences in CBS are related to differences in habitat type (forest-dwelling genera have larger CBS' than grassland forms), in diet (folivores have smaller CBS' than generalists or insectivores, frugivores and granivores), in zonation (arboreal genera have larger CBS' than terrestrial ones) and in activity timing (nocturnal genera have larger CBS' than dirurnal ones). However, these ecological categories are interrelated and, when the effects of other ecological differences are taken into account using analyses of variance, only the differences associated with diet, and possibly habitat remain. |
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Blackwell Publishing Ltd |
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1469-7998 |
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Equine Behaviour @ team @ |
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5455 |
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Author |
Clutton-Brock, T.H.; Harvey, P.H. |
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Title |
Primates, brains and ecology |
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Journal Article |
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Year |
1980 |
Publication |
Journal of Zoology |
Abbreviated Journal |
J. Zool. Lond. |
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190 |
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3 |
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309-323 |
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The paper examines systematic relationships among primates between brain size (relative to body size) and differences in ecology and social system. Marked differences in relative brain size exist between families. These are correlated with inter-family differences in body size and home range size. Variation in comparative brain size within families is related to diet (folivores have comparatively smaller brains than frugivores), home range size and possibly also to breeding system. The adaptive significance of these relationships is discussed. |
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Blackwell Publishing Ltd |
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Equine Behaviour @ team @ |
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5451 |
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Author |
Alexander, R, MCN et al |
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Title |
Fast locomotion of some african ungulates |
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Journal Article |
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Year |
1977 |
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Journal of Zoology |
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J Zool |
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183 |
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3 |
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291-300 |
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ABSTRACT
Ten species of ungulate were filmed, galloping in their natural habitat. They ranged in size from Thomson's gazelle (about 20 kg) to giraffe (about 1000 kg). They were pursued to make them run as fast as possible. The films have been analysed to determine speed, stride frequency, stride and step lengths, and duty factors. The dependence of these quantities on body size is discussed.
Summary:
Fast locomotion of zebra, giraffe, warthog and seven species of Bovidae has been studied. The animals were filmed from a pursuing vehicle while galloping in their natural habitat.
Stride frequency was more closely correlated with limb length (represented by hip height) than with body mass. Mean stride frequency was proportional to (hip height)-0·51 and maximum stride frequency to (hip height) -0·63.
Maximum speed was between 10 and 14 m s -1 for all species except buffalo (7 m s -1). It was not significantly correlated with body mass.
Since the small species ran at least as fast as the large ones they attained higher Froude numbers. Relative stride length was approximately 1·8 (Froude number)0·39 for all species, irrespective of size. Relative step length was approximately 0·65 (Froude number)0·2, both for the fore feet and for the hind ones. The vertical forces exerted by the feet are proportional to (body weight)×(Froude number)0·2 so the forces at maximum speed are larger multiples of body weight for small species than for large ones. |
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from Prof. Hans Klingels Equine Reference List |
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refbase @ user @ |
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130 |
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Author |
Bard Jbl, |
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Title |
A unity underlying the different zebra stripping patterns |
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Journal Article |
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Year |
1977 |
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J Zool Lond |
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183 |
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527-539 |
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from Professor Hans Klingels Equine Reference List |
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923 |
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