Abstract: 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
Index

Abstract: Three methods were used simultaneously to determine the relationships between the vertical forces exerted on the hooves and the positions of the limbs and hooves at the times of peak vertical forces from 2 horses galloping on a track straightaway. Vertical forces were recorded from an instrumented shoe, fetlock joint motion was measured with an electrogoniometer and the angles of the carpus, fetlock and hoof were determined from slow-motion films. At hoof contact, the mean angles of the carpus and fetlock were 181-182 degrees and 199-206 degrees, respectively. Peak vertical forces on the heel occurred at or near maximum extension of the carpal and fetlock joints. Peak forces on the toe occurred during flexion of the fetlock joint and at mean hoof angles of 28-31 degrees from the horizontal. The mean angles of the hoof from the horizontal at the time of heel contact were 6-7 degrees. Hoof lift occurred at mean carpal angles of 173-174 degrees and mean fetlock angles of 199-200 degrees.

Abstract: This study was designed to test the hypothesis that there is no significant difference in selected temporal and linear stride variables of the extended canter in horses bred and trained for dressage or racing. Nine advanced-level dressage horses and 7 Thoroughbred racehorses were filmed at a frame rate of 200 Hz at an extended canter on a sand track. Two strides were recorded per trial, and each horse performed 6 or 7 trials. Temporal and linear data were determined from the films, and descriptive statistics (mean, SD) were calculated. Strides were selected for analysis on the basis of having a velocity in the range of 6.0-7.0 m/s, and multivariate analysis of variance was used to detect significant differences in the stride kinematics of horses trained for the two sports (p < or = 0.01). The average velocity of the dressage horses was 6.37 m/s, compared with 6.40 m/s for the racehorses. There were no significant differences between the two groups in velocity, stride duration, stride length or the distances between limb placements. The stance durations of all four limbs and the overlaps between them were longer, whereas the duration of the suspension phase was shorter in the dressage horses than in the racehorses (p < or = 0.01). The time between impacts of the diagonal limb pair was close to zero in both groups, with individual horses showing some variability in the order of placement of the diagonal limb pair. However, the sequence of footfalls was not significantly different between the two groups (p < or = 0.01).