| Records |
| Author |
Castley, J.G.; Knight, M.H. |
| Title |
Population status of plains zebra, Equus burchelli, in South African National Parks. |
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| Year |
1997 |
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Scientific Services, National Parks Board |
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Kimberley, South Africa. |
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Equine Behaviour @ team @ |
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2254 |
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| Author |
Chu, G.Z., et al |
| Title |
The summer habitat and population numbers of the Mongolian wild ass in the Kalamaili Mountains Wildlife Reserve, Xinjiang Uygur Autonomous Region |
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Journal Article |
| Year |
1985 |
Publication |
Acta Zoologica Sinica |
Abbreviated Journal |
Acta Zoologica Sinica |
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31 |
Issue |
2 |
Pages |
178-186 |
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Chineese |
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Equine Behaviour @ team @ |
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2258 |
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| Author |
Joubert, E.; Louw, G.N. |
| Title |
Preliminary observations on the digestive and renal efficiency of Hartmann's zebra Equus zebra hartmannae. |
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Journal Article |
| Year |
1976 |
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Madoqua |
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Madoqua |
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10 |
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119-121 |
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Equine Behaviour @ team @ |
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2306 |
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| Author |
Eisenberg, J.F.; Kleiman, D.G. |
| Title |
Olfactory Communication in Mammals |
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Journal Article |
| Year |
1972 |
Publication |
Annual Review of Ecology and Systematics |
Abbreviated Journal |
Annu Rev Ecol Systemat |
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3 |
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1 |
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1-32 |
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Equine Behaviour @ team @ Eisenberg1972 |
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2316 |
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| Author |
Kruger, K.; Gaillard, C.; Stranzinger, G.; Rieder, S. |
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Phylogenetic analysis and species allocation of individual equids using microsatellite data |
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Journal Article |
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2005 |
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Journal of Animal Breeding and Genetics |
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122 |
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s1 |
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78-86 |
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Summary The taxonomic status of all equid species is not completely unravelled. This is of practical relevance for conservation initiatives of endangered, fragmented equid populations, such as the Asiatic wild asses (in particular Equus hemionus onager and E. hemionus kulan). In this study, a marker panel consisting of 31 microsatellite loci was used to assess species demarcation and phylogeny, as well as allocation of individuals (n = 120) to specific populations of origin (n = 11). Phylogenetic analysis revealed coalescence times comparable with those previously published from fossil records and mtDNA data. Using Bayesian approaches, it was possible to distinguish between the studied equids, although individual assignment levels varied. The observed results support the maintenance of separate captive conservation herds for E. hemionus onager and E. hemionus kulan. The first molecular genetic results for E. hemionus luteus remained contradictory, as they unexpectedly indicated a closer genetic relationship between E. hemionus luteus and E. kiang holderi compared with the other hemiones. |
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Equine Behaviour @ team @ |
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2334 |
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| Author |
Maloiy, G.M.; Boarer, C.D. |
| Title |
Response of the Somali donkey to dehydration: hematological changes |
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Journal Article |
| Year |
1971 |
Publication |
Am J Physio |
Abbreviated Journal |
Am J Physiol |
| Volume |
221 |
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1 |
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37-41 |
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Equine Behaviour @ team @ |
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2344 |
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| Author |
Sigurjónsdóttir , H.; van Dierendonck, M.C.; Snorrason, S.; Thórhallsdóttir, A.G. |
| Title |
Social relationships in a group of horses without a mature stallion |
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Journal Article |
| Year |
2003 |
Publication |
Behaviour |
Abbreviated Journal |
Behaviour |
| Volume |
140 |
Issue |
6 |
Pages |
783-804 |
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1. The social relationships in a group of Icelandic horses without a mature stallion were studied. The horses were all familiar to each other. Mutual grooming and play relationships, spatial associations, dominance-subordinate relations and the effect of kinship on these relationships were analysed.TAGSTARTBRTAGEND 2. The social structure was clearly dominated by the behaviour of the adult mares. The horses preferred to form bonds within their social class (sex/age) and they kept close proximity with their friends. The group was effectively divided into two social subgroups, adult mares as one group and adult geldings and sub-adults as another group. The sub-adults and adult geldings formed associations, which were based on mutual grooming and play, while the adult mares did not play. Differences between the sexes were evident. Males played more than the females, had more playing partners and were more popular as playmates.TAGSTARTBRTAGEND 3. Aggression rates were low. The dominance hierarchy was linear. Adult mares ranked higher than adult geldings, sub-adults and the foals. Rank was significantly correlated with age. The closer the adult mares were in rank, the more they groomed with each other. Such relationships were not found amongst the other social group.TAGSTARTBRTAGEND 4. Kinship was calculated between all pairs of animals for up to 4 or 5 generations. Allogrooming and play frequencies and proximity were all positively correlated with kinship. Adult mares, which were close in the dominance hierarchy, were on average more related than those further apart.TAGSTARTBRTAGEND 5. The social relationships in the Icelandic herd were, to some extent, different from relationships reported from unmanaged and feral horse-herds with mature stallions and bachelors. Our results suggest that adult mares groom more in groups without a stallion. Furthermore, they have more preferred partners than in natural harems and their partners are other adult mares, not their weaned offspring as seems to be the case in feral herds. The sub-adults also seem to be more socially active in the absence of stallions. Interestingly, in the Icelandic group, the adult mares showed stallion like behaviours, like mounting and protecting foals. Only by studying the behaviour and the nature of the relationships of horses in groups of different compositions, can we expect to gain a comprehensive understanding about individual social strategies and cognitive capabilities of the species. Such knowledge is valuable for management and welfare of the horse. |
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Equine Behaviour @ team @ |
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2363 |
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| Author |
Mills, M.G.L.; Shenk, M.G.L. |
| Title |
Predator--Prey Relationships: The Impact of Lion Predation on Wildebeest and Zebra Populations |
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Journal Article |
| Year |
1992 |
Publication |
The Journal of Animal Ecology |
Abbreviated Journal |
T. J. Anim. Ecol. |
| Volume |
61 |
Issue |
3 |
Pages |
693-702 |
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1. The role of lion Panthera leo predation in the dynamics of blue wildebeest Connochaetes taurinus and zebra Equus burchelli populations was investigated through simulation models. The data used in the models were from intensive observations over 4 years in the south-east of the Kruger National Park. 2. Population estimates of wildebeest and zebra were made from aerial surveys, sex and age ratios from ground counts. Lion numbers were determined from observations of marked and radio-collared animals. Predation was studied by following lions for continuous periods of up to 336 h. 3. Two models were constructed. Model 1 ascertained the number of killing lions (adult females) that could be supported by each prey population while remaining stable. A single model was constructed for the sedentary wildebeest population. A summer and winter model was constructed for the semi-migratory zebra population. The sensitivity of the parameters in the model was tested by changing their value by 10%. In model 2, the kill age structure for each species was changed to determine the number of killing lions the altered prey selection parameters could support. 4. There was no difference in the vulnerability of either species to predation. Zebra foals (<1 year) were killed more frequently than expected. No selection for sex or by season could be found for either species. 5. Model 1 predicted that the wildebeest population stabilizes with 7.7 killing lions, close to the number in the study area. The winter zebra population stabilizes with 6.8 killing lions and the summer zebra population with 19.4. Manipulation of kill rate followed by adult fecundity rate had the greatest effect on population size of both species. In model 2, wildebeest predation was made selective towards calves and zebra predation was made non-selective for sex and age. With these parameters the wildebeest population stabilizes with 10.7 killing lions and the zebra population with 5.4 in winter and 15.1 in summer. 6. The models suggest that lion predation affected wildebeest more severely than zebra during the study. This was through the way in which lions selected their prey, and because of the sedentary behaviour of the wildebeest, as opposed to the semi-migratory behaviour of the zebra. |
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Equine Behaviour @ team @ |
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2376 |
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| Author |
Mohr,E.; Speed, J. G.(Designer); Goodall D.M..(Translator) (eds) |
| Title |
The Asiatic Wild Horse |
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Mohr,E.; Speed, J. G.(Designer); Goodall D.M..(Translator) |
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9780851310138 |
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Equine Behaviour @ team @ |
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2385 |
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Chapais, B.; Girard, M.; Primi, G. |
| Title |
Non-kin alliances, and the stability of matrilineal dominance relations in Japanese macaques |
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Journal Article |
| Year |
1991 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
41 |
Issue |
3 |
Pages |
481-491 |
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Alliances among kin play a major role in a female's acquisition of her mother's dominance rank in many species of cercopithecines. It is noteworthy, however, that kin rarely form coalitions to challenge females from higher-ranking matrilines, and that matrilineal hierarchies are remarkably stable. One possible reason for the rarity of destabilizing coalitions is that members of high-ranking matrilines form alliances against lower ranking ones. In this paper the patterning of aggressive support among non-kin, and its effect on the stability of rank relations are analysed in a captive group of Japanese macaques, Macaca fuscata, composed of three unrelated matrilines. Analysis of the distribution of non-kin interventions in conflicts between matrilines over a 52-month period revealed a clear pattern of preferential support between the two dominant matrilines against the third-ranking one. This pattern was confirmed experimentally. Any member of the two dominant matrilines was unable, individually, to maintain its rank above the third-ranking matriline, but was able to do so in the presence of the other dominant matriline. Non-kin alliances appear to prevent subordinate females from challenging higher ranking females through revolutionary coalitions (formed among subordinates) or through bridging coalitions (formed among individuals ranking above and below the target). Non-kin support is interpreted in terms of cooperation versus reciprocal altruism. |
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refbase @ user @ |
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2863 |
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