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Author |
de Waal, F.B.; Johanowicz, D.L. |
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Title |
Modification of reconciliation behavior through social experience: an experiment with two macaque species |
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Journal Article |
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Year |
1993 |
Publication |
Child development |
Abbreviated Journal |
Child Dev |
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Volume |
64 |
Issue |
3 |
Pages |
897-908 |
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Keywords |
Aggression; Animals; *Behavior, Animal; Female; Grooming; *Macaca; *Macaca mulatta; Male; Play and Playthings; *Socialization; Vocalization, Animal |
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Abstract |
Reconciliation, defined as a friendly reunion between former opponents shortly after an aggressive encounter, is common in the stumptail macaque (Macaca arctoides) but rare in the rhesus macaque (M. mulatta). Juveniles of the two species were cohoused for 5 months, after which they were observed with conspecifics only. Control rhesus monkeys, matched in age and sex to the experimental subjects, went through the same procedure without exposure to the other species. A threefold increase in the proportion of reconciled fights was measured in the rhesus subjects. The difference emerged gradually during cohousing with the tutor species and was sustained following removal of this species. Other behavior, such as grooming and aggression, decreased over time. It is suggested that the social attitude of the subjects was affected through contact with a species characterized by a more relaxed dominance style. |
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Wisconsin Regional Primate Research Center, University of Wisconsin-Madison |
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0009-3920 |
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PMID:8339702 |
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no |
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Call Number |
refbase @ user @ |
Serial |
209 |
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Author |
de Waal, F.B.; Luttrell, L.M. |
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Title |
The similarity principle underlying social bonding among female rhesus monkeys |
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Journal Article |
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Year |
1986 |
Publication |
Folia primatologica; international journal of primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
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Volume |
46 |
Issue |
4 |
Pages |
215-234 |
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Keywords |
Aggression; Animals; Dominance-Subordination; Female; Grooming; *Group Processes; Macaca/*physiology; Macaca mulatta/*physiology; Male; *Object Attachment |
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Abstract |
Twenty adult female rhesus monkeys (Macaca mulatta) were observed over a three-year period. They lived in a mixed captive group with kinship relations known for three generations. The study's aim was to test Seyfarth's [J. theor. Biol. 65: 671-698, 1977] model of rank-related grooming and to investigate two other possible determinants of social bonding, i.e. relative age and the group's stratification into two social classes. Data on affiliation, coalitions, and social competition were collected by means of both focal observation and instantaneous time sampling. Whereas certain elements of the existing model were confirmed, its explanatory principles were not. Social competition did not result in more contact among close-ranking females (the opposite effect was found), and the relation between affiliative behavior and coalitions was more complex than predicted. Based on multivariate analyses and a comparison of theoretical models, we propose a simpler, more encompassing principle underlying interfemale attraction. According to this 'similarity principle', rhesus females establish bonds with females whom they most resemble. The similarity may concern genetical and social background, age, hierarchical position and social class. Effects of these four factors were independently demonstrated. The most successful model assumed that similarity factors influence female bonding in a cumulative fashion. |
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0015-5713 |
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PMID:3557225 |
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refbase @ user @ |
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211 |
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Author |
de Waal, F.B. |
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Title |
The organization of agonistic relations within two captive groups of Java-monkeys (Macaca fascicularis) |
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Journal Article |
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Year |
1977 |
Publication |
Zeitschrift für Tierpsychologie |
Abbreviated Journal |
Z. Tierpsychol. |
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Volume |
44 |
Issue |
3 |
Pages |
225-282 |
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Keywords |
Age Factors; Aggression; Animals; Behavior, Animal/*physiology; Competitive Behavior/*physiology; Fear; Female; Haplorhini; Humans; Macaca/*physiology; Macaca fascicularis/*physiology; Male; Sex Factors; Social Behavior; Social Dominance |
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The paper offers a detailed quantitative descripition of the distribution of agonistic activities over the members of two groups of Java-monkeys (Macaca fascicularis). These groups lived in captivity and were well-established: i.e. they had an extensive network of genealogical relationships. The study pays special attention to agonistic interactions with three or more participants. Its main purpose is an analysis of the way dyadic agonistic relations (e.g. dominance relations) are affected by third group members and the relations among these. The paper presents data on the ontogeny of 'dependent dominance', the 'control role' of the alpha-male, and the functions of different types of alliances. |
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0044-3573 |
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Notes |
PMID:412345 |
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no |
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Call Number |
refbase @ user @ |
Serial |
213 |
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Author |
Klein, E.D.; Bhatt, R.S.; Zentall, T.R. |
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Title |
Contrast and the justification of effort |
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Journal Article |
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Year |
2005 |
Publication |
Psychonomic bulletin & review |
Abbreviated Journal |
Psychon Bull Rev |
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Volume |
12 |
Issue |
2 |
Pages |
335-339 |
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Keywords |
Awareness; *Cognition; *Discrimination (Psychology); Female; Humans; Male; Questionnaires; *Visual Perception |
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Abstract |
When humans are asked to evaluate rewards or outcomes that follow unpleasant (e.g., high-effort) events, they often assign higher value to that reward. This phenomenon has been referred to as cognitive dissonance or justification of effort. There is now evidence that a similar phenomenon can be found in nonhuman animals. When demonstrated in animals, however, it has been attributed to contrast between the unpleasant high effort and the conditioned stimulus for food. In the present experiment, we asked whether an analogous effect could be found in humans under conditions similar to those found in animals. Adult humans were trained to discriminate between shapes that followed a high-effort versus a low-effort response. In test, participants were found to prefer shapes that followed the high-effort response in training. These results suggest the possibility that contrast effects of the sort extensively studied in animals may play a role in cognitive dissonance and other related phenomena in humans. |
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University of Kentucky, Lexington, KY 40506-0044, USA |
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1069-9384 |
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Notes |
PMID:16082815 |
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no |
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Call Number |
refbase @ user @ |
Serial |
223 |
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Author |
Croneya, C.C. |
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Title |
Group size and cognitive processes |
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Journal Article |
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Year |
2007 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
103 |
Issue |
3-4 |
Pages |
15-228 |
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Keywords |
Group size; Social complexity; Social learning; Cognitive processes |
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Abstract |
Animal group sizes may exert important effects on various cognitive mechanisms. Group
size is believed to exert pressures on fundamental brain structures that correlate with the
increased social demands placed on animals living in relatively large, complex and dynamic
social organizations. There is strong experimental evidence connecting social complexity,
social learning and development of other cognitive abilities in a broad range of wild and
domesticated animal species. In particular, group size seems to have significant effects on
animals? abilities to derive concrete and abstract relationships. Here, we review the literature
pertaining to cognitive processes and behaviours of various animal species relative to group
size, with emphasis on social learning. It is suggested that understanding the relationship
between group size and cognition in animals may yield practical animal management
benefits, such as housing and conservation strategies, and may also have implications for
improved animal welfare. |
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Ruth C. Newberryb |
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no |
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refbase @ user @ |
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277 |
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Author |
Heitor, F.; do Mar Oom, M.; Vicente, L. |
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Title |
Social relationships in a herd of Sorraia horses Part I. Correlates of social dominance and contexts of aggression |
Type |
Journal Article |
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Year |
2006 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
73 |
Issue |
2 |
Pages |
170-177 |
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Keywords |
Age Factors; *Aggression; Animals; Female; *Hierarchy, Social; Horses/*psychology; Male; Sex Factors; *Social Dominance; *Social Environment; Statistics, Nonparametric |
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Abstract |
Factors related to dominance rank and the functions of aggression were studied in a herd of Sorraia horses, Equus caballus, under extensive management. Subjects were 10 adult mares 5-18 years old and a stallion introduced into the group for breeding. Dominance relationships among mares were clear, irrespective of rank difference, and remained stable after introduction of the stallion. The dominance hierarchy was significantly linear and rank was positively correlated with age and total aggressiveness. Higher-ranking mares received lower frequency and intensity of agonistic interactions. Nevertheless, higher-ranking dominants were not more likely to elicit submission from their subordinates than lower-ranking dominants. Neither close-ranking mares nor mares with less clear dominance relationships were more aggressive towards each other. Agonistic interactions seemed to be used more importantly in regulation of space than to obtain access to food or to reassert dominance relationships. Contexts of aggression were related to mare rank. The results suggest that dominance relationships based on age as a conventional criterion were established to reduce aggressiveness in a herd where the costs of aggression are likely to outweigh the benefits. |
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Centro de Biologia Ambiental, Faculdade de Ciencias da Universidade de Lisboa, Campo Grande, Edificio C2, 1749-016 Lisboa, Portugal |
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0376-6357 |
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PMID:16815645 |
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no |
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refbase @ user @ |
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292 |
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Author |
Rietmann, T.R.; Stuart, A.E.A.; Bernasconi, P.; Stauffacher, M.; Auer, J.A.; Weishaupt, M.A. |
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Title |
Assessment of mental stress in warmblood horses: heart rate variability in comparison to heart rate and selected behavioural parameters |
Type |
Journal Article |
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Year |
2004 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
88 |
Issue |
1-2 |
Pages |
121-136 |
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Keywords |
Horse; Hrv; Heart rate; Mental stress; Behaviour; Autonomic nervous system |
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Abstract |
The aim of the study was to investigate whether heart rate variability (HRV) could assess alterations of the autonomic nervous system (ANS) at different levels of excitement. The behavioural and physiological responses of 20 warmblood horses to a challenging ground exercise task were studied. Prior to the experiment, the horses were evaluated at rest and during forward walking (FW). The horses were then forced to move backwards continuously during 3 min according to a standardised protocol (BW1). Subsequently, the horses were exposed to two training sessions, after which the backward walking (BW2) was re-evaluated. Heart rate (HR) and HRV-parameters such as the standard deviation of the beat-to-beat intervals (SDRR), the low (LF; sympathetic tone) and high frequency (HF) component of HRV (HF; parasympathetic tone) and their ratio (LF/HF; index representing the sympatho-vagal balance) were sampled at rest, and during FW, BW1 and BW2. Stress-related behaviour during BW1 and BW2 was determined from video recordings. The results of the different evaluations were compared to each other. Compared to rest and FW, the first backward experiment induced a significant rise in HR, LF and LF/HF and a significant decrease of HF. SDRR decreased from both FW and rest with only the latter reaching significance. In BW2 after the training sessions, HR and the parameters of the sympathetic branch of the ANS (LF, LF/HF) were decreased and the vagal tone (HF) increased compared to BW1; all changes were significant. The duration of stress indicating behavioural patterns revealed also a significant decrease of excitement after the training, when backward walking did not differ from forward walking in any parameter. Correlations between HRV-parameters and stress indicating behaviour as well as HR were found. We conclude that the HRV-parameters LF and HF are valuable measures to quantify sympatho-vagal balance, which allows a more precise assessment of the responses of HR and SDRR to mental stress during low intensity exercise. |
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refbase @ user @ |
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314 |
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Author |
Heitor, F.; do Mar Oom, M.; Vicente, L. |
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Title |
Social relationships in a herd of Sorraia horses: Part II. Factors affecting affiliative relationships and sexual behaviours |
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Journal Article |
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Year |
2006 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
73 |
Issue |
3 |
Pages |
231-239 |
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Keywords |
Horse; Equus; Affiliative relationship; Rank; Kinship; Aggressiveness |
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Abstract |
The influence of age, dominance rank, kinship and aggressiveness over affiliative relationships and sexual behaviours were analysed in a herd of Sorraia horses, Equus caballus, kept under extensive management. Subjects were 10 adult mares 5-18 years old that had known each other since birth, and a stallion introduced into the group for breeding for the first time. Kinship coefficient and dominance rank were the most important factors affecting affiliative relationships. Bonds were reciprocal and stronger among mares with higher kinship. Mares spent more time in proximity to close-ranking and lower-ranking females. Mares with stronger affiliative relationships or higher relatedness were not less aggressive towards each other. Affiliative relationships between the stallion and the mares were not reciprocal: lower-ranking mares formed stronger bonds with the stallion but he preferred the less genetically related mares for proximity. However, the stallion was involved in sexual behaviours more frequently with the mares that were more genetically related to him. These results suggest that kinship beyond close relatives may affect affiliative relationships both among familiar and among unfamiliar horses. However, the influence of kinship does not imply that horses possess a kin recognition system and alternative explanations are discussed. |
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refbase @ user @ |
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462 |
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Author |
Hausberger, M.; Muller, C. |
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A brief note on some possible factors involved in the reactions of horses to humans |
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Journal Article |
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Year |
2002 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
76 |
Issue |
4 |
Pages |
339-344 |
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Keywords |
Horses; Aggressiveness; Behavioural reactions; Human-animal relationship |
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In order to investigate relationships of adult horses to humans, we developed a simple evaluation test and scores based on observations. The first reactions of 224 adult horses to the presence of an experimenter were observed and scored. All these horses belonged to the same riding school, had the same general housing conditions and were all geldings. The evaluation was based on the horse's posture. Individual differences that could be related to some extent to the breed but also to human factors emerged clearly. French saddlebreds showed more often friendly behaviour than Angloarabs, whereas thoroughbreds were more indifferent. Clear variations occurred between groups of horses that depended on different caretakers. In this school, one caretaker is responsible for the whole daily management of a group of horses and is probably a very important factor in their well-being. The effects of this daily relation to a human seemed to be involved in the reactions to a strange person. Further studies are required to investigate what, in practice, may be determinant. |
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329 |
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Author |
Gardner, A., West, S. A. |
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Title |
Cooperation and Punishment, Especially in Humans |
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Journal Article |
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Year |
2004 |
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The American Naturalist |
Abbreviated Journal |
Americ. Natur. |
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164 |
Issue |
6 |
Pages |
753-764 |
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Keywords |
kin selection, neighbor-modulated fitness, repression of |
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Abstract |
Explaining altruistic cooperation is one of the greatest
challenges faced by sociologists, economists, and evolutionary biologists.
The problem is determining why an individual would carry
out a costly behavior that benefits another. Possible solutions to this
problem include kinship, repeated interactions, and policing. Another
solution that has recently received much attention is the threat
of punishment. However, punishing behavior is often costly for the
punisher, and so it is not immediately clear how costly punishment
could evolve. We use a direct (neighbor-modulated) fitness approach
to analyze when punishment is favored. This methodology reveals
that, contrary to previous suggestions, relatedness between interacting
individuals is not crucial to explaining cooperation through punishment.
In fact, increasing relatedness directly disfavors punishing
behavior. Instead, the crucial factor is a positive correlation between
the punishment strategy of an individual and the cooperation it
receives. This could arise in several ways, such as when facultative
adjustment of behavior leads individuals to cooperate more when
interacting with individuals who are more likely to punish. More
generally, our results provide a clear example of how the fundamental
factor driving the evolution of social traits is a correlation between
social partners and how this can arise for reasons other than genealogical
kinship. |
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University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, |
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refbase @ user @ |
Serial |
341 |
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