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Author |
Aureli, F.; Preston, S.D.; de Waal, F.B. |
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Title |
Heart rate responses to social interactions in free-moving rhesus macaques (Macaca mulatta): a pilot study |
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Journal Article |
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Year |
1999 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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Volume |
113 |
Issue |
1 |
Pages |
59-65 |
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Keywords |
Animals; Behavior, Animal/physiology; Female; Grooming/physiology; Heart Rate/*physiology; Macaca mulatta/*physiology; Male; Movement/*physiology; Pilot Projects; *Social Behavior |
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Abstract |
Heart rate telemetry was explored as a means to access animal emotion during social interactions under naturalistic conditions. Heart rates of 2 middle-ranking adult females living in a large group of rhesus macaques (Macaca mulatta) were recorded along with their behavior. Heart rate changes during 2 types of interactions were investigated, while controlling for the effects of posture and activity. The risk of aggression associated with the approach of a dominant individual was expected to provoke anxiety in the approachee. This prediction was supported by the heart rate increase after such an approach. No increase was found when the approacher was a kin or a subordinate individual. The tension-reduction function of allogrooming was also supported. Heart rate decelerated faster during the receipt of grooming than in matched control periods. |
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Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA. aureli@rmy.emory.edu |
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0735-7036 |
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PMID:10098269 |
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Call Number |
refbase @ user @ |
Serial |
197 |
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Author |
de Waal, F.B. |
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Title |
Food transfers through mesh in brown capuchins |
Type |
Journal Article |
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Year |
1997 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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Volume |
111 |
Issue |
4 |
Pages |
370-378 |
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Keywords |
Animals; Cebus/*psychology; *Feeding Behavior; Female; Food Preferences/psychology; Male; *Motivation; Sex Factors; *Social Behavior; Social Environment |
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Abstract |
Capuchin monkeys (Cebus apella) share food even if their partner is behind a mesh restraint. Pairs of adult capuchins were moved into a test chamber in which 1 monkey received cucumber pieces for 20 min and the other received apple slices during the following 20 min. Tolerant transfers of food occurred reciprocally among females: The rate of transfer from Female B to A in the second test phase varied with the rate from Female A to B in the first test phase. Several social mechanisms may explain this reciprocity. Whereas this study does not contradict cognitively complex explanations (e.g., mental record keeping of given and received food), the results are consistent with a rather simple explanation: that food sharing reflects a combination of affiliative tendency and high tolerance. The study suggests that sharing mechanisms may be different for adult male capuchins, with males sharing food more readily and less discriminatingly than females. |
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Yerkes Primate Center, Emory University, Atlanta, Georgia 30329, USA. dewaal@emory.edu |
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0735-7036 |
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Notes |
PMID:9419882 |
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no |
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Call Number |
refbase @ user @ |
Serial |
198 |
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Author |
de Waal, F.B.; Seres, M. |
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Title |
Propagation of handclasp grooming among captive chimpanzees |
Type |
Journal Article |
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Year |
1997 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
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Volume |
43 |
Issue |
4 |
Pages |
339-346 |
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Keywords |
Animals; Family Relations; Female; *Grooming; Learning; Male; Pan troglodytes/*psychology; *Social Behavior |
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Abstract |
A grooming posture previously reported for two wild chimpanzee (Pan troglodytes) communities developed spontaneously in a captive group of the same species. This offered a unique opportunity to follow the propagation of a new social custom. The posture consists of two partners grasping hands--either both right hands or both left hands--and raising the arms in an A-frame above their heads while mutually grooming with their free hands. The propagation of this pattern was followed over a 5 year period. In the beginning, handclasps were always initiated by the same adult female. This female initiated the posture mainly with her adult female kin. In subsequent years, these relatives became frequent participants in the posture with each other as well as with nonrelatives. Over the years the posture increased in frequency and duration and spread to the majority of adults and also to a few adolescents and older juveniles. The pattern persisted after removal of the apparent originator. |
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Address |
Yerkes Primate Center, Emory University, Atlanta, GA 30329, USA. dewaal@emory.edu |
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ISSN |
0275-2565 |
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Notes |
PMID:9403098 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
202 |
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Author |
Aureli, F.; de Waal, F.B. |
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Title |
Inhibition of social behavior in chimpanzees under high-density conditions |
Type |
Journal Article |
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Year |
1997 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
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Volume |
41 |
Issue |
3 |
Pages |
213-228 |
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Keywords |
Aggression/*psychology; Animals; *Behavior, Animal; *Crowding; Female; Male; Pan troglodytes/*psychology; Population Density; *Social Environment; Stress, Psychological |
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Abstract |
This is the first study to investigate the short-term effects of high population density on captive chimpanzees (Pan troglodytes). Subjects of the study were 45 chimpanzees living in five different groups at the Yerkes Regional Primate Research Center. The groups were observed under two conditions: 1) when they had access to both the indoor and outdoor sections of their enclosures; 2) during cold days when they were locked into the indoor runs, which reduced the available space by more than half. Under the high-density condition, allogrooming and submissive greetings decreased, but juvenile play increased. Remarkably, the rate of various forms of agonistic behavior, such as aggression, bluff charge, bluff display, and hooting, occurred less frequently under the high-density condition. This general decrease in adult social activity, including agonistic behavior, can be interpreted as an inhibition strategy to reduce opportunities for conflict when interindividual distances are reduced. This strategy is probably effective only in the short run, however. Behavioral indicators of anxiety, such as rough scratching and yawning, showed elevated rates, suggesting increased social tension under the high-density condition. |
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Address |
Yerkes Regional Primate Research Center, Emory University, Atlanta, GA 30322, USA |
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English |
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ISSN |
0275-2565 |
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Notes |
PMID:9057966 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
203 |
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Author |
de Waal, F.B. |
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Title |
Macaque social culture: development and perpetuation of affiliative networks |
Type |
Journal Article |
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Year |
1996 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
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Volume |
110 |
Issue |
2 |
Pages |
147-154 |
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Keywords |
Animals; Dominance-Subordination; Female; Macaca mulatta/*psychology; Male; Maternal Behavior; *Peer Group; Sexual Behavior, Animal; *Social Behavior; Social Distance; *Social Environment |
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Abstract |
Maternal affiliative relations may be transmitted to offspring, similar to the way in which maternal rank determines offspring rank. The development of 23 captive female rhesus monkeys (Macaca mulatta) was followed from the day of birth until adulthood. A multivariate analysis compared relations among age peers with affiliative relations, kinship, and rank distance among mothers. Maternal relations were an excellent predictor of affiliative relations among daughters, explaining up to 64% of the variance. Much of this predictability was due to the effect of kinship. However, after this variable had been controlled, significant predictability persisted. For relations of female subjects with male peers, on the other hand, maternal relations had no significant predictive value beyond the effect of kinship. One possible explanation of these results is that young rhesus females copy maternal social preferences through a process of cultural learning. |
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Address |
Department of Psychology, Emory University, Atlanta, Georgia 30322, USA. dewaal@rmy.emory.edu |
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English |
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ISSN |
0735-7036 |
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Notes |
PMID:8681528 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
204 |
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Author |
de Waal, F.B.; Uno, H.; Luttrell, L.M.; Meisner, L.F.; Jeannotte, L.A. |
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Title |
Behavioral retardation in a macaque with autosomal trisomy and aging mother |
Type |
Journal Article |
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Year |
1996 |
Publication |
American journal of mental retardation : AJMR |
Abbreviated Journal |
Am J Ment Retard |
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Volume |
100 |
Issue |
4 |
Pages |
378-390 |
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Keywords |
Animals; *Behavior, Animal; Brain/physiopathology; Female; Hydrocephalus/complications; Longitudinal Studies; Macaca mulatta/*genetics; Magnetic Resonance Imaging; Male; *Maternal Age; Psychomotor Disorders/*etiology; Social Behavior; Trisomy/*genetics; X Chromosome |
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Abstract |
The social development of a female rhesus monkey (Macaca mulatta) was followed from the day of birth until her death, at age 32 months. The subject, born to an older mother, had an extra autosome (karyotype: 43, XX, +18), an affliction that came about spontaneously. MRI scans revealed that she was also hydrocephalic. Compared to 23 female monkeys growing up under identical conditions, the subject showed serious motor deficiencies, a dramatic delay in the development of social behavior, poorly established dominance relationships, and greater than usual dependency on mother and kin. The subject was well-integrated into the social group, however. |
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Address |
University of Wisconsin-Madison, USA |
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ISSN |
0895-8017 |
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Notes |
PMID:8718992 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
205 |
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Author |
de Waal, F.B. |
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Title |
Bonobo sex and society |
Type |
Journal Article |
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Year |
1995 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
272 |
Issue |
3 |
Pages |
82-88 |
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Keywords |
Animals; Evolution; Female; Hominidae; Humans; Male; Pan troglodytes/*physiology; Sexual Behavior, Animal/*physiology; Social Behavior |
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Abstract |
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Address |
Yerkes Regional Primate Research Center, Atlanta |
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0036-8733 |
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Notes |
PMID:7871411 |
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no |
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Call Number |
refbase @ user @ |
Serial |
206 |
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Author |
Judge, P.G.; de Waal, F.B. |
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Title |
Intergroup grooming relations between alpha females in a population of free-ranging rhesus macaques |
Type |
Journal Article |
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Year |
1994 |
Publication |
Folia primatologica; international journal of primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
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Volume |
63 |
Issue |
2 |
Pages |
63-70 |
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Keywords |
Animals; Animals, Wild; Female; *Grooming; Macaca mulatta/*psychology; Male; Population Density; *Social Behavior |
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Abstract |
Intergroup affiliation among female rhesus macaques, Macaca mulatta, was examined in the captive free-ranging colony of Morgan Island, S.C., USA. The provisioned colony has many social groups (35) and is maintained at a relatively high population density (21 animals/ha) with a relatively low adult male to female ratio (1:8.8). Focal and ad libitum samples were collected on 32 adults (3 males and 29 females) from two groups. Although infrequent, grooming was observed between adult females from different groups, and alpha females were the main participants in these interactions. Colony records indicated that none of the intergroup grooms was between females formerly from a common group. Relations between familiar neighboring groups may be maintained by a combination of both affiliative and aggressive behavior. |
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Address |
Yerkes Regional Primate Research Center, Lawrenceville, Ga 30243 |
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ISSN |
0015-5713 |
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Notes |
PMID:7813977 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
208 |
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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 |
Type |
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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Address |
Wisconsin Regional Primate Research Center, University of Wisconsin-Madison |
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ISSN |
0009-3920 |
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Notes |
PMID:8339702 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
209 |
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Author |
Noë, R.; de Waal, F.B.; van Hooff, J.A. |
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Title |
Types of dominance in a chimpanzee colony |
Type |
Journal Article |
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Year |
1980 |
Publication |
Folia primatologica; international journal of primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
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Volume |
34 |
Issue |
1-2 |
Pages |
90-110 |
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Keywords |
Agonistic Behavior; Animals; Animals, Zoo; *Behavior, Animal; Competitive Behavior; Factor Analysis, Statistical; Female; Hierarchy, Social; Male; *Pan troglodytes; *Social Dominance |
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Abstract |
This study examines to what extent the concept of dominance can be used to describe the social structure of a group of semi-free-living chimpanzees. 15 behavioural variables, based on agonistic, competitive and affinitive behaviour patterns, have been compared with respect to the interindividual directions in which they occurred. In this analysis use was made of indices that reflect the position an individual occupies in the relationship structure. These indices were calculated per individual for all variables and subjected to factor analysis and cluster analysis. As a result, 13 of the variables could be grouped in three categories which have been labelled: (1) agonistic dominance; (2) bluff dominance, and (3) competitive dominance. Whereas the top positions in the hierarchies based on the first two closely related types of dominance were occupied by the adult males, the hierarchy based on the third type was headed by several adult females. |
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0015-5713 |
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Notes |
PMID:7439873 |
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no |
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Call Number |
refbase @ user @ |
Serial |
212 |
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