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| Author |
Smith-Funk, E.D.; Crowell-Davis, S.L. |
| Title |
Maternal behavior of draft mares (Equus caballus) with mule foals (Equus asinus x Equus caballus) |
Type |
Journal Article |
Year  |
1992 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
33 |
Issue |
2-3 |
Pages |
93-119 |
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| Abstract |
Draft mares and their mule foals were observed from the day of birth to Week 17 of each foal's life. The rate of nursing was recorded and the duration of nursing activity to the nearest second. The rate at which foals engaged in nursing activity varied at each age. The duration of nursing bouts varied slightly as the foals matured. Aggression was recorded during both nursing and non-nursing activity for both the mares and foals. Maternal aggression was highest during nursing activity, especially during the pre-nurse nuzzling period. Maternal aggression increased as the foals matured. Mother-directed foal aggression was primarily in response to maternal aggression. Spatial relationships between each focal dyad were recorded when the foals were upright, not nursing and when they were recumbent. Spatial relationships differed based on the foal's state. The activity in which the mare engaged while her foal was recumbent was recorded. The movements of the mares were also recorded during foal recumbency. Mares approached or maintained their distance from their recumbent foal more than they left their recumbent foal in all weeks of the study, except Week 2. |
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Equine Behaviour @ team @ |
Serial |
2272 |
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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 |
Type |
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 |
Povinelli DJ; Nelson KE; Boysen ST |
| Title |
Comprehension of role reversal in chimpanzees: evidence of empathy? |
Type |
Journal Article |
| Year |
1992 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
43 |
Issue |
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Pages |
633 |
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Equine Behaviour @ team @ |
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3031 |
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| Author |
Aureli, F.; Cossolino, R.; Cordischi, C.; Scucchi, S. |
| Title |
Kin-oriented redirection among Japanese macaques: an expression of a revenge system? |
Type |
Journal Article |
| Year |
1992 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
44 |
Issue |
2 |
Pages |
283-291 |
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The ability to recognize the close associates of other group members may permit the display of redirected aggression against the relatives of the former aggressor. However, the dominance structure and the kin-based alliance system of macaque society are expected not to favour the occurrence of this kin-oriented redirection. Nevertheless, within 1 h of being the victim of an attack, Japanese macaques, Macaca fuscata, were more likely to attack the former aggressor's kin than without such a conflict. The conditions under which the victim redirected against the former aggressor's kin were investigated. This kin-oriented redirection did not occur preferentially either after conflicts between individuals with unstable and/or uncertain dominance relationships or after conflicts with individuals that were unlikely to intervene in favour of their kin. Victims redirected against individuals that were younger than the former aggressor and often subordinate to the victim. They also redirected in an opportunistic way by joining polyadic interactions against the former aggressor's kin. The possibility that this kin-oriented redirection may have a long-term function in changing the aggressive attitude of the aggressor towards the victim is also discussed. In addition, the victim's kin also displayed a form of kin-oriented redirection. They were more likely to attack the kin of an individual after it had attacked their own kin. |
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10.1016/0003-3472(92)90034-7 |
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Equine Behaviour @ team @ |
Serial |
4867 |
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| Author |
de Waal, F. B. M. |
| Title |
Coalitions as part of reciprocal relations in the Arnhem chimpanzee colony |
Type |
Book Chapter |
| Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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Issue |
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Pages |
233-257 |
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Oxford University Press |
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Oxford |
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Harcourt, A.H.; de Waal, F.B.M. |
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Equine Behaviour @ team @ |
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4877 |
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| Author |
Manson, J.H. |
| Title |
Measuring female mate choice in Cayo Santiago rhesus macaques |
Type |
Journal Article |
| Year |
1992 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
44 |
Issue |
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Pages |
405-416 |
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Few studies of female mate choice have been carried out among free-ranging non-human primates. To qualify as female mate choice, behaviour by oestrous females must predict the occurrence or rate of potentially fertile copulations, in comparisons between heterosexual dyads. In this paper, data are presented to show three behaviour patterns that meet this criterion in free-ranging rhesus macaques, Macaca mulatta, at the island colony of Cayo Santiago: (1) selective cooperation with male sexual solicitations (hip-grasps), (2) restoration of proximity following attacks on females by intruding males, and (3) proximity maintenance (in one of two study groups). Oestrous females maintained proximity preferentially to lower ranking males, but this appeared to reflect differences in the tactics necessary to achieve copulations with males of different dominance ranks, rather than preference for lower ranking mates. Male-oestrous female dyads showed consistency over two consecutive mating seasons in which partner was responsible for proximity maintenance. Male dominance rank was positively correlated with copulatory rate with fertile females. However, in one study group, males to whom oestrous females maintained proximity more actively had higher copulatory rates with fertile females, independent of the effects of male dominance rank. |
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10.1016/0003-3472(92)90051-A |
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Equine Behaviour @ team @ |
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4889 |
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| Author |
Ehardt, C.L.; Bernstein, I.S. |
| Title |
Conflict intervention behaviour by adult male macaques: structural and functional aspects |
Type |
Book Chapter |
| Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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Issue |
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Pages |
83-111 |
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Oxford University Press |
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Oxford |
Editor |
Harcourt, A.H.; de Waal, F.B.M. |
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no |
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Equine Behaviour @ team @ |
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4926 |
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Zabel, C. J.; Glickman, S. E.; Frank, L. G.; Woodmansee, K. B.; Keppel, G. |
| Title |
Coalition formation in a colony of prepubertal spotted hyaenas |
Type |
Book Chapter |
| Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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113–135 |
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Oxford University Press |
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Oxford |
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Harcourt, A.H.; de Waal, F.B.M. |
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Equine Behaviour @ team @ |
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5232 |
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| Author |
Silk, J. B. |
| Title |
Patterns of intervention in agonistic contests among male bonnet macaques |
Type |
Book Chapter |
| Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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215-232 |
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Oxford University Press |
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Oxford |
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Harcourt, A.H., and de Waal, F.B.M. |
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Equine Behaviour @ team @ |
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5234 |
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Connor, R. C.; Smokler, R. A.; Richards, A. F. |
| Title |
Dolphin alliances and coalitions |
Type |
Book Chapter |
| Year |
1992 |
Publication |
Coalitions and Alliances in Humans and Other Animals |
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415-443 |
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Oxford University Press |
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Oxford |
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Harcourt, A.H.;de Waal, F.B.M. |
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Equine Behaviour @ team @ |
Serial |
5238 |
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