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Barton, R.A.; Whiten, A. |
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Title |
Feeding competition among female olive baboons, Papio anubis |
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Journal Article |
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1993 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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46 |
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4 |
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777-789 |
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Abstract. Competition for food is thought to play a key role in the social organization of group-living female primates, leading to the prediction that individual foraging success will be partly regulated by dominance relationships. Among adult females in a group of free-ranging olive baboons, dominance rank was significantly correlated with nutrient acquisition rates (feeding rates and daily intakes), but not with dietary diversity or quality, nor with activity budgets. The mean daily food intake of the three highest-ranking females was 30% greater than that of the three lowest-ranking females, providing an explanation for relationships between female rank and fertility found in a number of other studies of group-living primates. The intensity of feeding competition, as measured by supplant rates and spatial clustering of individuals, increased during the dry season, a period of low food availability, seemingly because foods eaten then were more clumped in distribution than those eaten in the wet season. Implications for models of female social structure and maximum group size are discussed. |
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Equine Behaviour @ team @ |
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4258 |
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Author |
Barton, R.A. |
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Title |
Sociospatial mechanisms of feeding competition in female olive baboons, Papio anubis |
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Journal Article |
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1993 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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46 |
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4 |
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791-802 |
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Abstract. Social and spatial mechanisms of feeding competition among adult female olive baboons were studied in two free-ranging groups, one foraging for natural foods, and one that was being provisioned. Similar behavioural processes were found to underlie rank-related differences in food intake in the two situations. Dominance rank of females in the naturally foraging group was positively correlated with the rate at which other animals were supplanted from feeding sites, the ratio of supplants of others to supplants received, and the number of near neighbours while feeding on clumped foods. It is unlikely that the latter result was due to rank-related differences in matriline size, because no significant correlations between rank and neighbour density were found for non-feeding activities. Step-wise regression analysis indicated that both number of neighbours and the supplant ratio explained significant proportions of inter-individual variance in daily food intake, though only the supplant ratio contributed significantly to feeding rate. High-ranking females also had priority of access to feeding sites within trees, and competition was most intense for foods that were spatially clumped. Similarly, in the provisioned group, rank was correlated with the rate at which supplants were received, and with spatial indices estimating centrality and the area of unoccupied space around an individual. Over 99% of the inter-individual variance in feeding rate was explained in a step-wise regression with supplant rates and spatial indices as independent variables. It is concluded that both active supplanting and individuals' spatial positions within the group mediate rank-related differences in food intake. |
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Equine Behaviour @ team @ |
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4259 |
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Veissier, I. |
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Title |
Observational learning in cattle |
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Journal Article |
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1993 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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35 |
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3 |
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235-243 |
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Four experiments were designed to find evidence of observational learning in cattle. The experiments were run on ten experimental heifers, each observing a demonstrator mate performing a task, and on ten control heifers, each observing a non-demonstrator mate. The mates and observers were separated by wire netting in Experiments 1-3, but were in the same room in Experiment 4. The task to be learned was to push a panel to get food into a box. All naive animals were able to observe while their mate performed the task. The observers in Experiments 1 and 4 were Salers heifers that had no prior experience of the testing room; those in Experiment 2 were Salers heifers that were accustomed to the room; those in Experiment 3 were Aubrac or Limousin heifers that had already eaten in the room.
The behaviour of the observers was influenced by their mates: activity at or near the boxes was enhanced by the presence of demonstrators in Experiment 2 (box contacts: 38.0 +/- 16.2 vs. 22.1 +/- 11.9 for experimental and control heifers, respectively; P<0.05), while activity in other parts of the room in Experiment 3 was enhanced when non-demonstrator mates were present (wall sniffing: 5.4 +/- 13.9 vs. 13.9 +/- 13.7; P<0.05). Overall, 26 experimental heifers vs. 19 controls learned the task (P>0.05). The time spent eating was longer when the observer only had visual contact with a demonstrator (Experiment 1: 15.9 +/- 1.6 vs. 11.6 +/- 1.8 min), but was lower when physical contacts with the demonstrator were possible (Experiment 4: 4.6 +/- 8.8 vs. 5.4 +/- 2.2 min; P<0.05).
Ten out of the 11 Limousin heifers learned the task, compared with only three out of the nine Aubrac heifers (P<0.05). The latter spent more time near the door and sniffed the walls more often than the former (2.0 +/- 1.9 vs. 0.4 +/- 0.6 min, P<0.05, and 18.1 +/- 13.4 vs. 2.7 +/- 6.5 min, P<0.01), as though they were trying to flee the situation.
When animals observed a demonstrator, their attention was drawn to stimuli involved in the task but acquisition of knowledge was not greatly improved. |
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Equine Behaviour Team @ birgit.flauger @ |
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4325 |
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Author |
Lieberman, D. |
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1993 |
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Learning, Behaviour and Cognition, 2nd Ed. |
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Cited By (since 1996): 8; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4525 |
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Author |
Parelli, P. |
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1993 |
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Natural Horsemanship |
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Cited By (since 1996): 5; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4538 |
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Author |
Mendoza, S.P.; Mason, W. A (eds) |
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Title |
Primate Social Conflict |
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1993 |
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This book examines conflict as a normal and recurrent feature of primate social life, emphasizing that the study of aggression and social conflict is important to understanding the basic processes that contribute to social order. The authors go well beyond the usual view which tends to equate social conflict with fights over food, mates, or social supremacy, and analyze the diverse manifestations and significance of conflict in a variety of case studies. Contributors are scientists with field and laboratory experience in anthropology, behavioral endocrinology, ethology, and psychology. Utilizing the growing body of research on life-span development in primatology, the authors offer more extensive analyses of the complexity of primate social relationships.
“I like the idea of social conflict as opposed to aggression as such. Too much of the focus on conflict has been on aggressive behavior, which is probably the most striking behavior observed in the field. The fact that conflict does not lead to aggression in all cases, that conflict is generally followed by some sort of reconciliation, and the consequences for fitness and future social life are important topics with respect to non-human primate society that should have considerable relevance to thinking about human social conflict.” -- Charles T. Snowdon, University of Wisconsin, Madison
William A. Mason is Research Scientist at the California Regional Primate Research Center and Professor Emeritus of Psychology at the University of California. Sally P. Mendoza is Associate Professor of Psychology and Research Scientist at the California Regional Primate Research Center.
1. Primate Social Conflict: An Overview of Sources, Forms, and Consequences
William A. Mason and Sally P. Mendoza
2. The Nature of Social Conflict: A Psycho-Ethological Perspective
William A. Mason
3. The Evolution of Social Conflict among Female Primates
Joan B. Silk
4. Social Conflict on First Encounters
Sally P. Mendoza
5. Reconciliation among Primates: A Review of Empirical Evidence and Theoretical Issues
Frans B. M. de Waal
6. Social Conflict in Adult Male Relationships in a Free-Ranging Group of Japanese Monkeys
Naosuke Itoigawa
7. The Physiology of Dominance in Stable versus Unstable Social Hierarchies
Robert M. Sapolsky
8. Temperament and Mother-Infant Conflict in Macaques: A Transactional Analysis
William A. Mason, D.D. Long, and Sally P. Mendoza
9. Impact on Foraging Demands on Conflict within Mother-Infants Dyads
Michael W. Andrews, Gayle Sunderland, and Leonard A. Rosenblum
10. Coordination and Conflict in Callicebus Social Groups
Charles R. Menzel
11. Social Conflict in Two Monogamous New World Primates: Pairs and Rivals
Gustl Anzenberger
12. Social Conflict and Reproductive Suppression in Marmoset and Tamarin Monkeys
David H. Abbott
13. Biological Antecedents of Human Aggression
Lionel Tiger
14. Conflict as a Constructive Force in Social Life
David M. Lyons
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Mendoza, S.P.;Mason, W. A |
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978-0-7914-1241-1 |
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Equine Behaviour @ team @ |
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4874 |
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Author |
de Waal, F.B.M. |
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Title |
Animal Social Conflict |
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Miscellaneous |
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1993 |
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Equine Behaviour @ team @ |
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4894 |
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Mulder, R.A.; Langmore, N.E. |
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Dominant males punish helpers for temporary defection in superb fairy-wrens |
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1993 |
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Animal Behaviour. |
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Anim. Behav. |
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45 |
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830-833 |
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10.1006/anbe.1993.1100 |
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Equine Behaviour @ team @ |
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4922 |
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Budzinsky, M.; Soltys, L; Wawiorko, J. |
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Title |
Estimate of excitability of half bred horses |
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1993 |
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43 Annual meeting FEZ. Madrid |
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Equine Behaviour @ team @ |
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5020 |
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Fabre-Thorpe, M.; Fagot, J.; Lorincz, E.; Levesque, F.,; Vauclair, J. |
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Laterality in cats: Paw preference and performance in a visuomotor activity. |
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1993 |
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Cortex |
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Cortex |
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29 |
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15-24 |
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In a two-choice discrimination paradigm, a bottlenose dolphin discriminated relational dimensions between visual numerosity stimuli under monocular viewing conditions. After prior binocular acquisition of the task, two monocular test series with different number stimuli were conducted. In accordance with recent studies on visual lateralization in the bottlenose dolphin, our results revealed an overall advantage of the right visual field. Due to the complete decussation of the optic nerve fibers, this suggests a specialization of the left hemisphere for analysing relational features between stimuli as required in tests for numerical abilities. These processes are typically right hemisphere-based in other mammals (including humans) and birds. The present data provide further evidence for a general right visual field advantage in bottlenose dolphins for visual information processing. It is thus assumed that dolphins possess a unique functional architecture of their cerebral asymmetries. |
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Bottlenose dolphin; Hemispheric specialization; Monocular vision; Numerical ability |
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Equine Behaviour @ team @ |
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5367 |
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